三级片a片无码_蜜乳AV成人电影_丝袜足交视频在线_日韩精品中文字幕亚洲专区腿精_安徽搡BBBB槡BBBB_欧美日B操B_非洲AV成人无码久久精品_av尤物_www.亚洲黄_WWWWWW美国黄片_蜜乳av影视_久久久亚洲成人AV无码电影_A片免费看在线不卡_国产无码8区_日屄福利视频

Successful Trial Rolling of 16MnCr5 in Steel Mill of Xingtai Steel
  Updatetime:2019-04-03 Hits:

  Recently, the steel mill of Xingtai Steel successfully rolled steel 16MnCr5 and has produced two furnaces as planned.

  Because this kind of steel is customized and it is only used to produce valve tappet, the production process should be stricter and the quality standard should be higher. To ensure the first production run smoothly, the steel mill did a lot of preparation, from the material to personnel training. At the same time, the factory and technicians made a lot of communication and reached an agreement. During the production process, technicians conducted all the time. The chemical composition of molten steel and its production process were controlled stably, and all the control requirements reached the expectation.

  This Successful Trial Rolling of 16MnCr5 accumulated rich experience for producing high-end automotive steel and laid a foundation for the continuous improvement of high-end product quality.