Special steel in the last 10 years, is stepping up response to the internationalization of the market and environmental protection issues such as the dramatic changes. The current financial crisis has led to the world economic downturn, Japanese domestic special steel manufacturers are cutting production. In this context, the situation on the field of special steel welding has also undergone great changes, there has been a fierce cost competition and enables companies to continue to survive and the pursuit of personalized welding materials and welding technology. In this paper, specific examples of an overview of the Welding Material, welding bonding technology development trends.

Due to the slow development of construction steel, automobile, shipbuilding, construction machinery, industrial machinery and other industries in the country and the rapid development in foreign countries, so that the production and sale of Welding Material in the past 10 years has been strong growth.

Production of statistics in Japan under the Japan electrode Industry Association four major welding materials varieties. Of which approximately 14% (about 50 000 t) for export. Tubular wire production has been stagnant in 2003, but recently due to the recovery of the shipbuilding industry, the production began to increase, close to the solid wire production levels. In addition, the applicator welding production fell slightly increasing trend of solid welding wire and submerged arc welding material.

The international market, since 2003, imports of Japanese solid wire showing a growth trend. Imports about 50 000 t in 2007, and welding materials exports fairly. From South Korea's largest volume of imports, accounting for about 70%, most of the rest from Taiwan and mainland China.

Welding materials research themes are: the welding of high-quality and high performance, high efficiency welding and, more recently, in particular the introduction of important welding environment improvement ".

The study not only the solid wire to wire itself, more of a welding wire and shielding gas, welding power combined study. Will pulse active gas arc welding and Tatung Co. developed 490MPa class high strength steel in mild steel using pulsed reactive gas shielded arc welding wire combine to inhibit the welding spatter. The reason is that due to the increased rate of decline of the pulse peak current, the increase in pulse frequency (skin effect enhanced current is concentrated in the wire surface, so the electromagnetic contractility increased, the droplet move smoothly) and will mainly contain the alkali metal grease coating on the wire surface inhibit the splash effect. The use of this wire can also improve the environment of the welding operation.

During the vehicle production line, automatic welding of thin steel plate requirements in addition to reducing the above-mentioned welding spatter, also calls for a reduction to welding fumes, welding Ministry of burn and welding line intermittent welding defects. Therefore, the wire in the future to continue efforts to develop an important work.

In the automotive industry, due to worldwide stricter exhaust regulations and improve fuel efficiency requirements, the requirements of the automotive lightweight growing in the exhaust system components, corrosion resistance, heat resistance and excellent parts .

Automotive exhaust systems, exhaust manifold has been changed by the casting greater use of sheet metal welded structure, therefore, to promote research and development of ferritic wire.

Tatung to develop both high temperature strength and corrosion resistance, but also has good welding operability of the ferritic wire, which, on the wire surface plating of Cu in the WSR series wire has been commercialized, applicable in many parts of the welding. Table 1 lists the brand and chemical composition of the newly developed wire. The WSR series wire WSR42K basic wire and high temperature performance WSR42KM improve the corrosion resistance of WSR35K weld metal grain refinement of anti-welding and good crack resistance WSR42KF formed series products.

The WSR series is a high-volume manufacturing of the Tatung unique ferritic stainless steel coating wire production equipment. The device automatically wire the power to lift scales, coating, finishing wire drawing, coiling operation. Bus electrolytic pickling by H2SO4 to remove the oxide scale, in order to improve the adhesion of the plated Cu layer, the implementation of the impact of the electroless Ni processing, and then, followed by side-plated Cu side of the light the whole Roberts and take advantage of volume spool coiling.