热处理制度对新型高强度不锈钢组织与性能的影响

Effect of the heat treatment on microstructure and mechanical properties of the new high strength stainless steel

新型高强度不锈钢属于马氏体时效硬化不锈钢,该钢采用二次硬化机理设计成分,添加多种强碳化物形成元素,添加高量Co细化M2X相,在合适的温度回火下,不仅具有高强度、高硬度,而且还有高的塑性与韧性,在航天航空领域有着广泛的应用前景。主要研究了热处理制度对新型高强度不锈钢组织与性能的影响,摸索出适合的热处理制度,保证钢获得强度与韧性的良好配合,为今后进一步研究和使用该钢提供试验依据。

The new high strength stainless steel belongs to martensite age-hardening stainless steel.As the secondary hardening mechanism was used to design its composition and a variety of strong carbide elements and a lot of Co-refining M2X phase were added to it,the steel had high strength,high hardness,high plasticity and high toughness when it was tempered at an appropriate temperature.It also has found a wide application prospect in the aerospace area.This paper aims to study the effect of the heat treatment regime on the microstructure and properties of the new high strength stainless steel and tries to find out an appropriate heat treatment regime to make the steel possess a good match between its strength and toughness.It will provide experimental foundations for the further research and application of the steel.