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1.绪言锻造淬火就是在稳定的奥氏体区域锻造后,利用余热进行淬火的技术。是把加工和热处理合并在一起的形变热处理之一。锻造淬火具有显著改善淬透性的优点,可使碳钢提高到与低合金钢相同的水平,以取代低合金钢,因此这种淬火方法多用于中碳钢,主要用于制造汽车、建筑机械零件。在普通的再加热淬火中,加入不同极微量B和Cr、Mo等就可以明显的提高淬透性。可是,锻造淬火法是加热到奥氏体高温区,锻造后直接淬火,B对提高淬透性并不明显。因此本试验为了探讨B钢锻造淬火是否适用,特别研究了锻造条件(温度、变形程度)对B钢淬透性的影响,并和非硼钢作了比较。
1. Introduction Forging Quenching is the use of residual heat for quenching after it has been forged in a stable austenitic region. It is one of the thermomechanical treatments that combine processing and heat treatment. Forging Quenching has the advantage of significantly improving hardenability, allowing carbon steels to be raised to the same level as low alloy steels to replace low alloy steels, so this quenching method is mostly used in medium carbon steels and is mainly used in the manufacture of automotive, construction machinery Components. In ordinary reheat quenching, adding a trace amount of B and Cr, Mo, etc. can significantly improve the hardenability. However, the forging quenching method is heated to high temperature austenite, direct quenching after forging, B to improve hardenability is not obvious. Therefore, in order to investigate whether B steel forging quenching is suitable for this test, the influence of forging conditions (temperature, degree of deformation) on hardenability of B steel was studied in detail and compared with that of non-boron steel.