成人啪啪一区二区三区_欧美日韩一道本_手机av在线不卡_午夜免费成人_最新激情网站_精品国产肉丝袜久久首页_午夜高清国产拍精品_97播播_午夜性无码专区_国产精品999视频_天天干,狠狠干_奇米网久久_亚洲最新在线观看_国产艹b视频_h无码精品3d动漫在线观看_一级黄色片在线播放_丝袜熟女国偷自产中文字幕亚洲_久久丫精品久久丫_热re91久久精品国99热蜜臀_欧美久久黄

Visit：2446 Date：2022-06-08

① Cold processing  
Cold processing refers to a processing process that causes plastic deformation to cause plastic deformation at lower crystallization temperature. Such as cold rolling, cold stroke, cold squeeze, stamping, cutting processing, etc.  
Cold processing refers to the ability to meet these processing processes.  
② castability  
Steel castability means that steel can use casting to obtain the performance of qualified castings.  
The castability mainly includes steel liquidity, solidification, contraction and bias.  
Liquidity refers to the ability of steel water to be filled with molding. The contraction refers to the degree of volume shrinkage when steel liquid solidification. Poor analysis means that during the cooling solidification process, the chemical composition and tissue's unevenness of the metal internal chemical and tissue are caused by the difference in crystals. Essence The smaller the two -phase area, the better the castability.  
③ Forgetisability  
Forgedness means that metal materials can change the shape without cracking performance during pressure processing. It includes processing such as hammer forging, rolling, stretching, squeezing and other processing in thermal or cold. The forgedness is mainly related to the chemical composition of metal materials.  
④ welding  
It means that metal materials can obtain the performance of high -quality welding joints under certain process conditions.