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1.引言淬火钢中除马氏体外,由于淬透性的不同,尚可形成贝茵体、珠光体、铁素体等组织,在回火后,性能也不一致;因此由于钢的淬透性不同,热处理后内部组织也不同,而钢的性能也不一致,所以这三者是互相联系的。在已有顶端淬火试验方法中,联系淬透性与组织性能的方法尚不多,本文叙述一种新的顶端淬火法,可以测定淬透性和相应的钢的性能。2.新顶端淬火法通用的标准顶端淬火试样,由于用硬度测定淬透深度,不能指示淬透深度与回火后机械性能的关系,因为淬火后硬度相近,但组织并不一致的,例如有时含马氏体80%与50%的钢中,硬度相差仅HRC=2。此两种不同组织,回火后性能是不同的,含马氏体多的
1. Introduction Quenched steel in addition to martensite, due to the different hardenability, can still form bainite, pearlite, ferrite and other organizations, after tempering, the performance is not consistent; therefore, due to the hardenability of steel Different, heat treatment after the internal organization is different, and the performance of steel is not the same, so the three are interrelated. In the existing top quenching test method, the method of contacting hardenability and microstructure properties is still scarce. This paper describes a new top quenching method that can measure the hardenability and the corresponding properties of steel. 2. The new top quenching method commonly used standard top quenching sample, as measured by the hardness through the depth, can not indicate the relationship between the depth of penetration and mechanical properties after tempering, because the hardness after quenching similar, but the organization is not consistent, for example, sometimes With martensite 80% and 50% of the steel, the hardness difference of only HRC = 2. The two different organizations, after tempering the performance is different, with more martensite