The paper presents our researches on the HSS T_1, M_2, M_1 (AISI) si S 3.3.2. (SEW320), classically and cryogenically treated (-94deg F, -184deg F, -320deg F). The increased durabilities for the cryogenic variants of thermal treatment can be attributed to some profound changes of residual austenite to the forming of some uniformly-distributed fine precipitates as well as to the increase of the martensite alloying degree.
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机译：本文介绍了我们对HSS T_1，M_2，M_1（AISI）si S 3.3.2的研究。 （SEW320），经过经典和低温处理（-94°F，-184°F，-320°F）。热处理的低温变体的耐用性增加归因于残余奥氏体的一些深刻变化，这归因于一些均匀分布的细小析出物的形成以及马氏体合金化程度的提高。
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