10Cr14Ni6Mn4不锈钢的马氏体转变

Martensite Transformation in 10Cr14Ni6Mn4 steel

用光学显微镜、透射电子显微镜和Ｘ射线衍射仪研究了经１０５０℃×０．５ｈ固溶处理和６９．１％冷变形，再快速加热到８００℃～１１００℃水冷后，放入液氮中冷处理的１０Ｃｒ１４Ｎｉ６Ｍｎ４钢的马氏体转变。试验结果表明，试验用钢存在γ→ε、γ→ε→α和γ→α３种形式的马氏体转变。ε马氏体的形态为细片状，ε马氏体和奥氏体的位向关系为（１１１）γ∥（０００１）ε、［１１２］γ∥［１２１０］ε。α马氏体有两种形态：板条状马氏体和细颗粒状马氏体。α马氏体和奥氏体的位向关系符合Ｋ－Ｓ关系。

The martensite transformation of the 10Cr14Ni6Mn4 stainless steel has been investigated by means of optical and transmission electron microscopy and X ray diffraction The 9 mm diameter rod of 10Cr14Ni6Mn4 steel is cold drawed into 5 mm diameter wire after 1050℃×0 5h solution treating The deformation is 69 1%.The specimens of 5 mm diameter wire are rapidly heated up to 800℃～1100℃ and followed by water cooling,and then,immersed in liquid nitrogen The results are as follows:There are three types of martensite transformations in the present steel,γ→ε、γ→ε→αand γ→α The HCP εmartensite morphology is of fine plate The orientation relationship between εand γ is given as:(11 1 ) γ∥(0001) ε、 γ∥[1 2 10] ε.There are two different morphologies of the BCC αmartensite in the present steel, lath and fine grained shapes The orientation relationship between α and γ agrees with that of K S