蜜臀av人妻国产精品建身房,日韩成人精品一区二区,亚洲成人精品一区二区三区

色哟哟入口国产精品丨免费日韩视频丨xnxx女第一次丨亚洲阿v天堂网2019无码丨日本一级中文字幕久久久久久丨日韩成人短视频丨日韩毛片子丨在线观看精品视频网站丨国产欧美日韩综合视频专区丨久久www成人_看片免费不卡丨国产精品熟妇一区二区三区四区丨国产成人牲交在线观看视频丨国产普通话对白刺激丨国产午夜成人无码免费丨另类αv欧美另类aⅴ丨欧美色狠丨韩国午夜理伦三级在线观看丨新国产精品视频福利免费丨jizz在线观看视频丨成人久久免费网站

Service Hotline

086-577-86923687

Generate a magnetic stainless steel head cold causes and solutions

Release Time:2011-09-16 Views :

Stainless Steel head case more data is austenitic stainless steel as material, cold forming processing methods. After the cold worked austenitic stainless steel generally produce strong or weak magnetic, especially for stainless steel head, elbow, deep drawing parts, such as processing a large extent the product.

Cold worked stainless steel head causes magnetism:

First, when the metastable austenitic stainless steel cold forming, a portion of the austenite martensite transformation, and keep the original austenite coherent in shear mode in the absence of diffusion occurs very short phase transition, students called induced martensitic transformation or deformation induced martensitic transformation;

Second, the martensitic stainless steel generally α 'Markov Hugh and dense hexagonal structure ε martensite two kinds of forms, including α' body-centered cubic structure having a magnetic martensite, ε martensite non-magnetic, but only higher nickel-chromium content, it produced ε martensite.

So commonly used in the stainless steel parts of the organization by the austenite into martensite, it will generate a magnetic. Austenite stability by its chemical composition determines, work-induced martensite and is also related to the intensity of processing.

If you want to avoid generating magnetic stainless steel head method it can only be based on a material change or for solution treatment.