奥氏体不锈钢
austenitic stainless steel
①固熔处理：加热到固熔温度（1050〜1100℃),让所有碳化物及冷加工形成的马氏体全部熔人和转变成奥氏体，然后快冷，这种热处理可以得到最软且塑性最高的效果。
① Solid melting treatment: heat to the solid melting temperature (1050 ~ 1100 ℃), melt and transform all carbides and martensite formed by cold working into austenite, and then cool quickly. This heat treatment can obtain the softest and most plastic effect.
②应力松弛处理：消除内应力（275〜450℃，0.5〜2h),力学性能可以得到改善。
② Stress relaxation treatment: eliminate the internal stress (275 ~ 450 ℃, 0.5 ~ 2H), and the mechanical properties can be improved.
③稳定化处理：加热至900℃，使大部分碳化铬熔解，使碳化铬不再在晶间析出。
③ Stabilization treatment: heat it to 900 ℃ to melt most of chromium carbide, so that chromium carbide will no longer precipitate between crystals.
④消除σ-相的处理：在高铬奥氏体不锈钢含镍不足的情况下， 不锈钢锻件热处理时可能会产生σ-相，使钢的冲击韧性值下降。所以，热处理时应可避开σ-相的形成温度（500〜970℃)。
④ Eliminate σ- Phase treatment: when the nickel content of high chromium austenitic stainless steel is insufficient, it may occur during heat treatment of stainless steel forgings σ- The impact toughness of the steel decreases. Therefore, it should be avoided during heat treatment σ- Phase formation temperature (500 ~ 970 ℃).