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[Dalian Furong Machinery]: Professional precision welding and dissolution control technology to give your products excellent connection reliability

In the field of high-end manufacturing, welding is no longer just about “connecting”, but is the core guarantee of product performance, life and safety. [Your Company Name] is deeply committed to the field of precision welding, turning the micro-science of dissolution control into the macro-value we create for our customers.

Core welding techniques we specialise in
High-energy beam welding (laser welding/electron beam welding)

Technical features: Extremely high energy density and precisely controlled heat input enable perfect welds with large depth-to-width ratios and minimal distortion.

Dissolution control: Extremely fast cooling inhibits the growth of brittle phases and is particularly suitable for joining dissimilar metals (e.g. copper to aluminium, steel to titanium).

Application Scenarios: Medical devices, aerospace precision components, power battery cell connections.

Vacuum brazing and shielded atmosphere brazing

Technical features: Carried out in an oxygen-free environment, no flux is required, resulting in absolutely clean, oxidation-free, high-strength welds.

Dissolution control: By precisely controlling the furnace temperature profile and holding time, we ensure optimum dissolution and diffusion of the brazing material into the base material, avoiding excessive erosion and resulting in extremely dense joints.

Application Scenarios: Tungsten carbide tools, aerospace hot end components, semiconductor manufacturing equipment cavities.

Automated and Intelligent Welding Systems

Technical features: Integrated robotics, vision sensing and real-time quality monitoring ensure consistency and traceability of each weld.

Dissolution Control: The system monitors current, voltage and temperature in real time to ensure that the heat input is always within the process window, eliminating poor dissolution due to fluctuating parameters at the source.

Professional challenges we have overcome
Perfect joining of dissimilar materials: Challenges due to coefficient of thermal expansion and metallurgical compatibility are solved by precise interlayer design and process control.

Non-destructive welding of ultra-thin-walled parts: With precise control of heat input, welding of thin pieces of 0.1 mm or less is possible without distortion or burn-through.

Stable welding of highly reflective materials: For example, for the laser welding of copper and aluminium, we have a proven process package that ensures a stable process.

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See how we’ve solved core component connectivity challenges for industry leaders in our success story.

solderedDefect analysis: How to avoid weld failures due to “dissolution” problems?

When a welded joint fails, often the problem is not in the material itself, but in the microscopic “dissolution” process. Understanding and controlling dissolution is the key to eliminating common welding defects and improving product yields. This article will act as your weld diagnostician, taking you to troubleshoot typical problems caused by improper dissolution.

Common defects I: excessive dissolution
Phenomenon: Welding seam edges appear notch (bite edge), the base material is “gouged”; serious cases even burn through the sheet.

Causal analysis:

Excessive heat input: too high current, too slow welding speed.

Excessive soldering time: In brazing, too much heating time leads to excessive dissolution of the base metal in the brazing material.

Solder/base material mismatch: The selected solder is too aggressive to the base material.

Solution:

Optimisation of welding parameters and use of pulse welding to reduce heat input.

Precise control of brazing holding time.

Re-select the solder with lower activity or more compatible operating temperature.

Common defect II: insufficient dissolution
Phenomenon: The solder can not be spread when brazing, just gathered into a ball; low strength of the weld, easy to peel.

Causal analysis:

Insufficient temperature: Failure to reach the temperature required for the solder to actually melt and dissolve with the base metal.

Poor surface cleanliness: Oxide film, oil and grease prevent the solder from contacting the base metal.

Flux failure: Insufficiently active or deteriorated flux to effectively dissolve the oxide film.

Solution:

Calibrate heating equipment to ensure accurate temperatures.

Strictly enforce pre-weld cleaning procedures (e.g. pickling, mechanical grinding).

Select a high quality, activity-matched flux and pay attention to its effective protection range.

Common defect III: Brittle phase generation
Phenomenon: weldAppearance is good, but brittle fracture occurs when subjected to force.

Causal analysis: When there is excessive dissolution and diffusion between the solder and the base material, hard and brittle intermetallic compounds may be formed at the bonding interface.

Solution:

Strictly control the welding temperature and holding time.

An intermediate layer is added between the base metal and the solder to block the direct interaction of harmful elements.

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Dissolving and welding: Uncovering the science and key processes of weld formation

In the wonderful world of welding, “dissolution” is a crucial physico-chemical process that directly determines the strength and reliability of the weld head. Many people mistakenly think that welding is simply a matter of “melting and bonding”, but behind the scenes is a sophisticated process of “dissolution” and “diffusion” at work. This article takes a closer look at the science of dissolving and welding.

I. What is “dissolution” in welding?
In the context of welding, “dissolution” usually means:

Mutual dissolution of base material and solder: In brazing and fusion welding, the molten solder (or filler metal) interacts with the solid base material surface, with atoms of the base material dissolving into the liquid solder, while atoms of the solder diffuse into the base material to form a transition layer with a gradual change in composition.

Dissolution and removal of oxide film: In aluminium or stainless steel welding, the key role of the flux is to dissolve and remove the oxide film on the surface of the base material, so that the pure metal surface is exposed and a good fusion can be achieved.

II. Core welding process based on the “dissolution” principle
Fusion Welding – Thorough dissolution and re-solidification

Process: The weld area (base material and filler material) is heated until it melts, forming a common melt pool. In this molten pool, the different metal elements are fully dissolved and mixed, and when cooled, a new, uniform weld metal crystal is formed.

Applications: MIG/MAG welding, TIG welding, laser welding. Suitable for joining high strength structural parts.

Brazing – precise capillary soluble joints

Process: The base material is not melted, but only brazing materials with lower melting points (e.g. copper- and silver-based brazing materials) are heated and melted. The molten brazing material fills the gap by capillary action and forms a strong metallurgical bond by slight dissolution and diffusion with the surface of the base material.

Applications: Air conditioning ducts, circuit boards, carbide cutting tools, jewellery. Suitable for precision, dissimilar material connections.

III. Why is it important to control “dissolution”?
Improper dissolution can lead to serious welding defects:

Excessive dissolution: Leads to edge biting, burn-through of the base material, or the formation of brittle intermetallic compounds, which reduces the strength of the joint.

Insufficient dissolution: The solder is not firmly bonded to the base material, but only mechanically attached, and is prone to peeling.

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Rivet Welding and Dissolution Technology Shape Manufacturing Future Together
The next chapter in manufacturing is being written in a double play of material connections and separations

Manufacturing stands at a turning point. Traditional process boundaries are blurring, replaced by the deep integration of multiple technologies. In the midst of this transformation, the combination of rivet welding and dissolution technologies is quietly shaping the future picture of manufacturing. This article looks at how this convergence trend is redefining the manufacturing process and how organisations can prepare for this future.

Technology convergence: paradigm shift from singularity to synergy
Traditionally, in the classification of manufacturing processes, riveting and welding and dissolution technology are in different fields – the former focuses on joining materials, the latter on separating them. However, this boundary is breaking down. The synergistic effect of the two technologies is creating the value of one plus one over two.

In the automotive industry, press riveting (SPR) has been widely used as a mechanically cold-formed joint for aluminium-aluminium and aluminium-steel connections.8 At the same time, an understanding of the inter-material solubility behaviour has become crucial for optimising the joining parameters and improving the reliability of the joints.7 This intersection of knowledge from different technological fields is typical of the future development of the manufacturing industry.

Intelligent transformation: data-driven process optimisation
With the in-depth application of Industry 4.0 technology, the rivet welding and dissolution process is rapidly developing in the direction of digitalisation and intelligence. Taking the research of aluminium alloy unilateral self-punching friction rivet welding process in Shanghai Jiaotong University as an example, the two-stage process is optimized through orthogonal experimental design, and the trend of the test indexes with the change of factors is analysed, so that the optimal process parameters-3 are finally selected.

A similar approach applies to dissolution process optimisation. For example, an efficient dissolution process in the Bohai Oilfield significantly improved dissolution efficiency by finely controlling the three phases of dissolution-4. This data-driven approach to process optimisation will become standard practice for manufacturing companies in the future.

Sustainability: the dual contribution of green manufacturing
The combination of rivet welding and dissolution technology offers unique value when it comes to green manufacturing and sustainability:

1. Material efficiency gains

Advanced rivet welding technologies, such as single-sided self-pierce friction rivet welding, reduce material use through optimised joint design-3, while dissolution technologies, such as the polystyrene recycling process, support the circular economy model by converting waste plastics into reusable pellets through solvent dissolution-9.

2. Optimisation of energy consumption

Solid-state joining techniques in rivet welding, such as friction elements, typically consume less energy than conventional fusion welding. And efficient dissolution processes, such as polymer dissolution applied in the Bohai Oilfield, improve energy efficiency by optimising process parameters-4.

Future Application Scenarios
1. Manufacture of multi-material structures

Future product structures will be more multi-material design to fully utilise the performance advantages of each material. In this context, the combination of rivet welding and dissolution technology will provide more solutions for joining dissimilar materials. For example, intermediate layers or transition structures prepared by dissolution technology can optimise the performance of rivet-welded joints.

2. Adjustable connection technology

Based on a deeper understanding of the solubility behaviour of materials, the future may see the emergence of tunable joining technologies – joins that remain strong under certain conditions and can be easily separated under another. Such controllable connections are important for product recycling and reuse.

3. Distributed manufacturing model

Efficient dissolution technologies make the geographically distributed recycling and reuse of materials more feasible-9 while advanced rivet welding soldering technologies support the localised manufacturing model. The combination of these two technologies provides technical support for a distributed manufacturing model.

Corporate Response Strategies
In the face of the trend towards the integration of rivet welding and dissolution technologies, manufacturing companies can consider the following strategies:

Cultivation of interdisciplinary talents: Breaking down the boundaries of traditional specialisations to cultivate complex talents who master both material joining and separation technologies.

Focus of R&D investment: Increased R&D investment in cross-cutting technology areas, especially in cross-innovation of material interface behaviour and processes

Building a co-operative ecosystem: establishing co-operation with universities and research institutes to track the latest technological developments, such as the innovative process of unilateral self-punching friction riveting welding and other innovative processes-3

Digital tool application: introduction of advanced simulation and data analysis tools to optimise process parameters and improve product quality and productivity

concluding remarks
The integration of rivet welding and dissolution technology is much more than a simple superposition of two manufacturing processes. It represents a new paradigm in the development of manufacturing – from isolated process optimisation to systematic material handling solutions, and from single technology breakthroughs to cross-field collaborative innovation. For manufacturing enterprises, grasping this trend and actively laying out cross technology fields will be the key to taking the lead in future market competition. With the continuous progress of materials science and process technology, this cross-border integration will open up more new possibilities for the manufacturing industry and redefine the way we manufacture products.

Application of Dissolution Technology in Rivet Welding: Principles, Processes and Case Studies
The process boundaries of manufacturing are being redefined when dissolution ceases to be a separation and becomes a bridge to connectivity

In the field of rivet welding and soldering, dissolution is much more than a simple material separation process. From the formation of the solder alloy to the quality control of the joints, an in-depth understanding of the dissolution behaviour has become a key factor in optimising the joining process. In this paper, we will discuss the application principles, specific processes and practical examples of dissolution technology in rivet welding.

Solubility: a basis for material dialogue in rivet welding soldering
Solubility is essentially the ability of one substance to dissolve into another substance-7. In rivet welding welding, this definition is reflected on two levels:

Alloy Manufacturing Stage: The various elements that make up the solder alloy must dissolve into each other to form an alloy of the correct composition. If they do not mix/diffuse well, precipitates of individual metals are obtained in the solidified product-7.

Stage of the soldering process: Solubility depends on the ability of the alloy to diffuse in the metallisation. The solubility/diffusion rate in the substrate is different for different solder alloys-7.

Understanding this is essential for the optimisation of the rivet welding process. For example, in the unilateral self-punching friction rivet welding process, the friction between the rivet and the material produces heat to soften the plate to be joined, and the mutual diffusion behaviour of the materials in this thermodynamic coupling process directly affects the quality of the joint-3.

Heat-dissolution coupling effects in rivet welding soldering
In advanced rivet welding welding process, there is a close coupling between heat input and dissolution behaviour. Taking the aluminium alloy unilateral self-punching friction rivet welding process researched by Shanghai Jiaotong University as an example, its process principle is to use high-speed rotating semi-hollow rivets to rivet into the plate to be connected, and the friction between the rivet and the material produces heat to soften the plate to be connected-3.

In this process, the heat input changes the dissolution properties of the materials, and the mutual dissolution of the materials affects the heat transfer and joint formation. It has been shown that under some parameters, the material between the upper and lower plates of the joint forms a metallurgical connection under the action of heat-3, which is similar to the mutual dissolution of metals in conventional welding.

Application of the dissolution process in connection pre-treatment
Dissolution technology also plays an important role in the pre-treatment stage of joining. Taking the efficient polymer dissolution process applied in the Bohai Oilfield as an example, the process controls the polymer dry powder dissolution time to about 40 minutes by optimising the three stages of the dissolution process-4, which greatly improves the efficiency of the subsequent joining process.

A similar principle is used in metal joining pre-treatment. By means of specific dissolution techniques, oxidised layers or contaminants can be removed from the metal surface, creating more favourable surface conditions for subsequent rivet welding.

Practical Example: Dissolution Technology Optimised Riveting Welding
Case 1: Automotive Lightweight Connectivity

In automotive lightweight manufacturing, press riveting (SPR) has been widely used for aluminium-aluminium joining and aluminium-steel joining-8 In this process, the understanding of the dissolution behaviour of the coated metal directly influences the selection of joining parameters. For example, the joining of galvanised steel sheets to aluminium alloys requires full consideration of the mutual dissolution characteristics of zinc and aluminium at elevated temperatures in order to avoid the formation of brittle phases.

Case 2: Plastic-metal composite structural connections

Dissolution technologies have shown unique value in the joining of plastic-metal composite structures. For example, the polystyrene dissolution process uses solvent dissolution to dissolve polystyrene waste plastic and recycle polystyrene pellets by heating, degassing, extruding and pelletising.9 This type of process can be used to prepare an intermediate layer for plastics-metal joining to optimise the joining properties of dissimilar materials.

Process optimisation: parameter selection based on dissolution behaviour
Parameter optimisation based on material dissolution behaviour is crucial in the development of rivet welding welding process. Taking the research of unilateral self-punching friction rivet welding process in Shanghai Jiao Tong University as an example, the two-stage process was optimised by orthogonal experimental design, and the joint geometric evaluation index and mechanical properties were used as the experimental indexes, respectively, and the optimal two-stage process parameters were selected in the end-3.

A similar approach applies to other forms of rivet welding soldering. By analysing the dissolution behaviour of the material in the coupled heat-force field, the process window can be determined more precisely, improving the quality of the joint and process stability.

concluding remarks
The convergence of dissolution technology with rivet welding and soldering represents a shift in manufacturing away from traditional process classification towards interdisciplinary integration based on materials science. An in-depth understanding of dissolution behaviour not only helps us to optimise existing joining processes, but also provides a scientific basis for the development of next-generation joining technologies. For manufacturing companies committed to technological innovation and process optimisation, capitalising on this convergence of technologies will be a key strategy to stay ahead of the competition.

Rivet Welding Welding and Dissolving Technology: The Invisible Ally of Modern Manufacturing
Behind the seemingly indestructible metal connection is a delicate dance between materials science and fluid dynamics.

When we talk about joining technologies in manufacturing, riveting and welding are often seen as two distinct processes. However, in today’s state-of-the-art manufacturing, they are forming an unexpected synergy with a seemingly unrelated technology: dissolution. This cross-border combination is redefining the way we approach joining and separating materials.

Rivet Welding: The Perfect Balance of Non-Detachable and Detachable
Rivet-weld welding, as a composite joining process, skilfully combines the strength of welding with the flexibility of riveting. In practice, it retains the advantages of high strength and air tightness of welded joints-1, while dispersing stress concentrations through riveted elements and improving the fatigue life of the joint-6.

In aluminium alloy joining, the unilateral self-pierce friction riveting process demonstrates the advantages of this synergistic effect. The process utilises high-speed rotating semi-hollow rivets riveted into the plates to be joined, with friction heat generation softening the material to form a mechanical-solid phase composite joint-3. This thermally coupled process not only reduces plate deformation during joining, but also, in some parameters, allows the material between the upper and lower plates to form a metallurgical joint under the action of heat-3.

Dissolution technology: an unexpected bridge from separation to connection
The application of dissolution technology in manufacturing goes far beyond traditional materials separation or recycling. In welding, an understanding of the solubility of metals in welding is critical – it determines whether two metals can form an alloy of the correct composition-7.

There are two ways of thinking about the solubility of solder alloys: either the two elements must dissolve into each other when the alloy is made in order to form an alloy of the correct composition, or during the soldering process, where solubility depends on the ability of the alloy to diffuse into the metallisation-7. For example, indium (In) diffuses at a different rate than tin (Sn) into copper (Cu), and some alloys such as BiPb do not diffuse into the copper metallisation at all-7. 7.

Synergistic application of rivet welding and dissolving
1. Polymer-metal composite connections

Dissolution technologies show unique value when it comes to joining plastics to metals. For example, polystyrene dissolution technology uses solvents to dissolve waste plastics and recovers polystyrene pellets by heating, degassing, extruding and pelletising.9 The low reaction temperature of this type of dissolution process ensures that the quality of the recovered polymer material does not deteriorate.9

2. Application of high-efficiency dissolution processes to joining pre-treatment

The efficient dissolution process developed in the Bohai Oilfield controls the polymer dissolution time to around 40 minutes, setting the stage for the subsequent joining process-4. This process optimises the three phases of dissolution and significantly reduces the amount of platform space occupied by the dissolution system-4.

Future outlook: the technological frontier of cross-border integration
With the advancement of material science, the combination of rivet welding and dissolution technology will become closer. Especially in the field of multi-material structures (e.g. aluminium-steel hybrid joints) and heterogeneous material joints, a deeper understanding of the solubility behaviour between materials will directly determine the success of the joining process.

Stamped riveting (SPR) has been widely used as a mechanical cold-formed joint for aluminium-aluminium and aluminium-steel joints in automotive lightweighting design.8 Understanding the solubility characteristics of different metals during the welding process is essential for avoiding joining defects and improving the reliability of the joints-7.

concluding remarks
The combination of riveting welding and dissolution technology represents a modern manufacturing industry that is moving from traditional process boundaries to multi-dimensional integration. This cross-border synergy not only solves the technical challenges that are difficult to deal with by a traditional single process, but also opens up new possibilities for joining and separating materials. For manufacturing companies committed to technological innovation and process optimisation, an in-depth understanding of the interaction of these two technologies will be a key strategy to maintain a leading position in the highly competitive market.