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为便于热处理专业人员开展标准化管理工作和了解近期编制的有关热处理标准的情况,减少查找标准文本的时间,本文对有关热处理方面的标准做一般性的介绍,以供参考。 1.25MnTiBXt钢碳氮共渗齿轮金相检验标准JB 4154—85 本标准适用于25MaTiBXt钢拖拉机碳氮共渗齿轮。标准中对碳氮共渗表面层的碳氮浓度和氮化物、马氏体和残留奥氏体评级、表面和过渡区域黑
In order to facilitate the standardization of heat treatment professionals to carry out management work and to understand the recent preparation of the heat treatment standards, to reduce the time to find the standard text, the paper on the heat treatment standards for a general introduction for reference. 1.25MnTiBXt steel carbonitriding gear metallographic inspection standards JB 4154-85 This standard applies to 25MaTiBXt steel tractor carbonitriding gear. Standard on carbonitrided surface carbonitride concentration and nitride, martensite and retained austenite rating, the surface and the transition zone black