摘要
马氏体具有四方的结构,其四方性随含碳量的增加而增大,点阵发生扭曲,当含碳量比较高时,原来α-铁晶体的晶面如(110)、(200)、(211)、(220)等的衍射线条分解成为双重线(101-110、002-200、112-211、202-220)。当含碳量降低时,双重线非常靠近,形成了一条宽的线带,使得马氏体晶格参量的测量十分困难。本文利用每对双重线中的多重性因素的变化特点(如101为8,110为4,002为2,200为4,112为8,211为16等)提出了低碳马氏体晶格参量的测量方法。
Martensite has a tetragonal structure, the tetragonality can enhance and its lat- tice become distortable with content of carbon increasing. When the content of carbon is large, diffraction lines of crystal plane （110）, （200）, （211）, （220） at α-Ferrite would turn to doublets（101- 110,002 - 200,112 - 211,202- 220）. Whereas the content of carbon is reduced, these doublets are very close with each other and assemble a wide line finally, which lead to measurement on crystal lattice of martensite more difficultly. Using chan- ging feature of multiplicity factor on per doublets（101 is 8, 110 is 4, 022 is 2, 200 is 4, 112 is 8, 211 is 16, etc）, a new measuring method on crystal lattice parameters of low-car- bon martensite was established in this paper.
出处
《光散射学报》
北大核心
2013年第4期398-402,共5页
The Journal of Light Scattering
基金
浙江省公益技术研究工业项目基金(2012c21111)
关键词
马氏体
衍射
晶格参量
测量
Martensite
Diffraction
Crystal lattice
Measurement
