热处理温度对含钼铁素体不锈钢0Cr17Mo2S组织及性能的影响

Effect of Heat Treatment Temperature on Microstructure and Properties of Molybdenum Bearing Freeite Stainless Steel 0Cr17Mo2S

不锈钢中添加钼元素可显著改善其耐点蚀能力,但中高铬铁素体不锈钢中添加钼元素后会促进组织中形成富铬、富钼类析出相,会在一定程度上降低材料耐点蚀性能;故制定合理的热处理工艺是生产含钼类铁素体不锈钢时的重要环节。以OCr17Mo2S钢种为例,研究了热处理温度750~1 050℃对材料内组织、力学性能及析出相的影响。

The addition of molybdenum in stainless steel can greatly improve its pitting resistance.However,the addition of molybdenum in medium-high chromium ferritic stainless steel promotes the formation of chromium-rich or molybdenum-rich pre cipitates in the structure,which can reduce the pitting resistance of the material to a certain extent.So the development of a suitable heat treatment process is an important part of the production of molybdenum-containing ferritic stainless steel.This paper takes the 0 Cr17Mo2S as an example,the effects of different heat treatment temperature 750~1 050℃ on the microstructure,mechanical properties and precipitates of the material.