Cr与Mo对堆焊金属耐磨料磨损性能的影响

Effect of Cr and Mo on abrasion resistance in weld deposit

对在中碳的Mn-Si系堆焊金属中加入Cr、Mo后形成的Mn-Si-Cr系、Mn-Si-Cr-Mo系堆焊金属进行了常规的化学分析、扫描电镜及能谱分析、X射线光谱分析,旨在明确Cr、Mo在堆焊金属中是以何种形式影响耐磨性能,并建立Cr、Mo与耐磨性之间的关系,最终寻找最经济的具有优良耐磨性的合金含量范围。结果表明,对于中碳的Mn-Si-or系及Mn-Si-Cr-Mo系,在所试验含量范围(Cr≤5.0%.Mo≤2.0%)内,Cr、Mo并不是以第二相的形式,而主要是以固溶态形式存在于基体中,同时在带冲击的磨料磨损条件下Cr对耐磨性作用明显,但有最佳含量范围,而Mo对耐磨性作用不明显。

Chemical analysis, SEM, EDX analysis and X-ray analysis have been applied to the Mn-Si-Cr and Mn-Si-Cr-Mo system weld deposit which was formed by adding Cr and Mo into the Mn-Si System overlay metal. The purpose of this paper is to study in which way chromium and molybdenum can affect the abrasion resistance of weld deposit, establish the relation between the contents of chromium and molybdenum and the abrasion resistance and finally seek the optimum range of the alloying element constituent which makes the weld metal most economic and good for abrasion resistant. It is approved that chromium and molybdenum ar(?) solid-soluted in the matrix of Mn-Si-Cr and Mn-Si-Cr-Mo system medium carbon weld deposit for the range studied (Cr≤5.0%, Mo≤2.0%), and that the appropriate contents of chromium in weld deposit improve abrasion resistance while the contents of molybdenum do not improve the abrasion resistance efficiently.