檢視先共析铁素体的原始碼

[[File:先共析铁素体.jpg|缩略图|[https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%85%88%E5%85%B1%E6%9E%90%E9%93%81%E7%B4%A0%E4%BD%93&step_word=&hs=0&pn=0&spn=0&di=10670&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=3474404105%2C3234068903&os=4195760231%2C1471727732&simid=0%2C0&adpicid=0&lpn=0&ln=242&fr=&fmq=1624313846991_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fwww.wendangwang.com%2Fpic%2F45953fe9a2b793e8131d4c42%2F10-810-jpg_6-1080-0-0-1080.jpg%26refer%3Dhttp%3A%2F%2Fwww.wendangwang.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1626905879%26t%3De6a7d2e380e0cef7a7fac8b1f8203fd0&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bojg1wg2owg2_z%26e3Bv54AzdH3F15vAzdH3F9clcnujlwdk0lnjb8n819v9dAzdH3F8a&gsm=1&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined 原图链接][https://www.wendangwang.com/doc/45953fe9a2b793e8131d4c42/10 来自文档网]]]
'''先共析铁素体''' （proeutectoid ferrite）本意是低于共析成分的奥氏体，从高温慢冷下来之际，在发生共析相变（[[共析转变]]）之前析出的铁素体。由奥氏体晶界首先析出（转变温度约为770℃~680℃）。一般情况下，呈细条状分布在奥氏体晶界，有时也呈块状。非共析钢在珠光体转变之前析出先共析相的转变称为先共析转变。