Standard specification for pressure vessel plates , alloy steel , quenched - and - tempered , chromium - molybdenum , and chromium - molybdenum - vanadium 压力容器用经回火和淬火的铬钼铬钼钒及铬钼钒钛硼合金钢板的标准规范
Sintered ferrous materials , carburized or carbonitrided - determination and verification of case - hardening depth by a micro - hardness test 烧结铁类材料.渗碳或碳氮共渗.用微型硬度测试法测定和验证外层淬火的深度
In chapter four , in our experiments , we selected four representative mould steels as samples . after laser heat treatment , the hardness of samples was measured by special instrument , microstructure was also photographed to be analyzed carefully . through these experiments , we also debated on the theories which explain the new phenomenon occurring in laser overlapping treatment 第二章：介绍了工业中的各种激光加工技术和激光加工系统，详细说明了本实验所使用的高功率激光加工系统；第三章：详细叙述了激光淬火的机理和热传导数学模型；第四章：通过实验，分析激光淬火后的模具钢的硬化带的硬度分布及金相组织特性，同时对激光交叠热处理的特点及形成机理都作了深入的探讨。
The research results on laser hardening of the fibre - cutting roller showed that using laser surface hardening process instead of thermal spraying to strengthen the surface of fibre - cutting roller of 4crl 3 stainless steel is practicable . not only this technique overcame the disadvantage of larger heat distortion by using thermal spraying but also possessed the advantages that the operation is simply and that expense is easy 过丝辊激光表面淬火的研究表明，选取恰当的工艺参数对过丝辊表面采用激光淬火替代传统的热喷涂是切实可行的，该方法不但能够克服热喷涂方法中工件变形大的不足，而且工艺简便、成本低廉，实用性强，具有明显的经济效益和推广应用价值。
