There occours needle - type or M - type martensite precipitation within retained austenite.

残余奥氏体内有针状或“M”型马氏体析出.

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The decomposition and transformation of the retained austenite in bainite differ from that in martensite.

贝氏体中的残余奥氏体分解和转变的行为与马氏体中的不同.

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Therein, both retained austenite decomposition and carbides precipitation were the key factors in the cryo - treating process.

其中残余奥氏体的分解和微细碳化物的析出是关键因素.

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