Welding materials for welding in the course of the study, we found that simply meet the user's performance requirements for surfacing layer has enough material in the course of the environmental issues become increasingly important.
In the first stage of research and production, because of financial and time reasons, we will focus more on the use of welding materials, design, performance, less emphasis on material properties of the welding process, that: as long as the wear resistance of materials , corrosion resistance to meet customer needs, even worse some of the welding process, but the effective use of materials, the ideal cost-effective, would have a market, as the process of welding fumes are not so big, serious or not splash, weld slag off other good a series of problems are not taken seriously enough.
So, in a very long period of time, we can see many domestic Welding Electrode Supplier materials, welding clouds after the surface pores, inclusions serious, poor weld surface roughness, adhesion lot of flying particles, the appearance of poor quality, to a certain extent, affect the results, but because fewer varieties of domestic hardfacing material, users do not have much choice.
With increasing competition in the market, we will study in depth the material related to environmental protection issues have been referred to the agenda. As the market matures, with foreign brands in the domestic market, promote, so just be satisfied with the user's needs, regardless of the operability of welding materials, even if performance no matter how good, may also end because of environmental reasons, without on-site welding welcome, and ultimately lose existing market share.
Second, there is surfacing welding with welding material environmental problems 1 and anti-pore problem of smoke
As the alloy content of surfacing materials are more general, smoke more, especially for on-site station less space, airflow environment, the welding can not be too long, will be smoke-filled.
(1) electrode resistance to moisture problems in hydropower plants to promote cavitation wear resistance welding found that on-site repair of turbine blades are mostly carried out in the machine pit, as in the ground, machine pit environment is very humid, due to an overhaul period usually half a month to about 3 ~ 4t welding electrodes, a considerable amount of work with no time to bake before now, which requires moisture resistance welding performance is very good, even if used in damp situations, not surfacing layer there will be holes (pores surfacing event, must be promptly cleaned up, otherwise there will be a source of cavitation).
In addition, the welding space is very small, poor air circulation, in welding, welding rod should be as small amount of dust, or when workers are continuously welded air quality is very poor, very harmful to the health of workers. Therefore, the requirements for special conditions, we conducted a performance of the electrode continuous improvement, the electrode performance anti-wet-site requirements have been met. Sometimes even after the rod accidentally fell into the water, then pulled out no problem.
For welding fumes problem, on the one hand, we actively and users to communicate, it is recommended to enhance ventilation in welder position; the other hand we have the ratio of the alloy from the electrode itself and reduce Brazing Alloys slag to adjust the amount of dust, made some effect, but remains to be further studied in depth.
However, with the welding industry paid more attention on environmental issues, continuous improvement, we believe that more people devote their energies to engage in research in this area, the domestic brands will eventually do well.
2. Spatter and slag removal problems
In the repair of large parts of the site found that slag off a serious problem affecting the welding efficiency. Before welding is generally large, depending on the situation will be warm, continuous welding, welding rod or wire if the thick residue, the residue will be very difficult to clear, but also easily affect the weld, resulting in a mixture of the welding surface flaw detection over can not pass, or cause welding surface roughness is not good, need more than a certain thickness of the margin weld to solve the problem, increasing repair costs. For this problem, we maximize the use of non-slag welding slag or less of the system, wire-based metal powder, so that the process of welding slag is basically no problem, reduce labor intensity.
No residue to bring the biggest drawback is the type of welding spatter large, especially in the new pre-protection welding, the welding process if a large splash, splash surface of the product there will be many points, it is not allowed by the new, welding clean-up work after the splash is very annoying, have been the workpiece after welding, a half-day off the work should be completed, but sometimes because of Splash o'clock, post clean-up may take an additional day; while flying a large amount of material also affects the effective utilization. To address this problem, we adjust the product in a timely manner, adding the appropriate elements of detailed droplet, so that large particles significantly reduced spatter, and easier to clean up small particles of spatter from splashing get total control.
Third, strengthen the research and production of environmental issues, it helps the healthy development of welding materials, green way
With the welding material research continues to deepen, more and more aware of environmental counterparts the importance of the industry. While building a people-oriented harmonious society, but also we need to focus more on reducing environmental pollution welding on.
With the influx of foreign brands abroad a lot, so we have also seen compared to the gap. Previously, our product design, product manufacturing, product packaging and product transport, very little concern for environmental issues. At this stage, if required to do all aspects of our perfect, does not quite real thing. However, if we start from now, a fundamental importance to this issue, environmental awareness, we will put this concept into the different areas to go, and gradually improve the quality of our production system, and ultimately the State Department's " Green remanufacturing engineering "so that the healthy development of welding materials, green path.
Flux by flux instructions first before using the provisions of baking, this drying process specification is based on testing and test control obtained, quality assurance of accurate data, which is a corporate standard, different companies have different requirements of the specification, followed by according to JB4709-2000 <<steel pressure vessel Welding Wires Manufacturers procedures>> recommended drying temperature and hold time flux. General flux drying, stacking height of not more than 5cm., Brazing Alloys libraries often number in a dry small to multi-generation, on the thickness of the stacked thin to thick-generation, which should be strictly managed to ensure the flux of drying quality. Avoid stacking thickness is too thick, by extending the drying time to ensure that flux through baking.