Development of High Hardness and Endurance Stack Welding Rod
In order to develop the manual electrode with high hardness and excellent wear resistance,the formula of electrode medicine skin is designed by adding wide sources,cheap and economical high carbon iron chromium and boron carbide and a small amount of iron vanadium,iron molybdenum,iron niobium and other alloy powder.Multi-layer surwelding technology is used to observe the Fe-Cr-B-C and discuss the tissue pattern and distribution of Fe-Cr-B-C in the weld.The microstructure and phase of the stacking layer were studied by an optical microscope(OM)and X-ray diffraction(XRD).The results show that the welding rod developed this time has good welding performance,no internal cracks after welding,and the slag removal performance is good.The organization of the weld alloy is mainly needle martensite+Fe and(Fe,Cr)3(B,C),and the average Rockwell hardness of the weld layer can reach 61.8 HRC,which has good wear resistance.
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