Study On Iron Based High Temperature Wear Resistance Surfacing Electrode And Welding Process

Now in our country the wear resistant surfacing material studied , utilized and made is Fe-Cr-C , Fe-Cr-B and high chromium cast iron alloy system and powder Cobalt and Nickel-based alloys used in plasma arc. At the same time, abroad wear resistant surfacing materials used at the high temperature are mainly Stellite NO.12 based on Cobalt and . they all have extraordinary virtues in the corrosion resistance , wear resistance, heat stability etc. But in fact there are difficulties because Cobalt and Nickel are rare and expensive, so it is indispensable to investigate the high temperature wear resistant surfacing material with low price. In allusion to the using condition of high temperature grind particle wear, stainless steel core wire is used in the electrode, the alloy elements are transferred into the surfacing layer through coating, and many kinds of hard phases are synthesized, which obtain many elements compounded strengthening. A new type of iron-based high temperature wear resistant surfacing electrode was invented and its wear resistant mechanism was investigated.This paper integrated orthogonal regression design into experiment, optimized electrode alloy system. According to the characteristic of high temperature wear resistance surfacing, the initial prescription of the electrode was determined through series of experiments and calculation. Corresponding to the weightless of high temperature abrasion, the prescription was designed through one time orthogonal regression, the regression equation between the weightless of abrasion and alloy composition in coating was established. At the same time, corresponding to the analysis of structure of surfacing layer and distributing of hard phase, its effect regular was found and finally favorable performance of surfacing layer was formed.In the end, welding procedure of the electrode was studied by experiment to find the most suitable procedure. Furthermore, a kind of electrode computer aided design system was developed. Scientific approach was used to design experiment, construct mathematical modeland optimize welding material component. Thus quantitative design of welding material was realized.Research achievement in this paper not only apply in practice and has favorable social and economic benefit but also it is of great direct importance to study on high temperature wear resistance.