【摘要】 研究了Ｃｒ－Ｗ－Ｖ和Ｃｒ－Ｍｏ－Ｖ堆焊金属在热疲劳试验过程中组织的变化行为以及化学成分和组织对耐热疲劳性能和耐磨性能的影响，并制定了合理可行的夹送辊和助卷辊的堆焊工艺。研究结果表明，起弥散强化作用的钨的碳化物在热疲劳试验过程中易于聚集长大，从而降低热疲劳强度；在Ｃｒ－Ｍｏ－Ｖ堆焊金属中加入小于１％的镍，会提高热疲劳性能，但加入过多的镍则显著降低相变温度（Ａｃ１），并对耐磨性不利；基体组织为均一、稳定的板条马氏体，且在其上分布着弥散、稳定的钒的碳化物，有利于抗热疲劳和抗磨损更多还原

【Abstract】 In the paper,the change of microstructure of CrWV & CrMoV building up metals during thermal fatigue test has been investigated,and the effects of chemical composition and microstructure on the resistance to thermal fatigue and wear have been analyzed.It is shown that tungsten carbides which are contributor of dispersed phase hardening are easy to gather and grow up and the resistance to thermal fatigue is reduced consequently,the thremal fatigue resistance will be raised by adding Ni less than 1 % in surfacing metals,excessive Ni will reduce the transformation temperature (Ac1)evidently and also do harm to wear resistance.The structure of homogeneous and stable lath martensite as matrix with stable fine vanadium carbides on is of advantage to resist thermal fatigue and wear.更多还原