99热这里-欧亚av-色先锋av-国产草逼视频-91在线亚洲-成人性生活免费视频-午夜影院污-樱桃香蕉视频-精品久久久一区-男人天堂亚洲天堂-国产美女视频一区-欧美一级性片-av在线色-99r在线视频-一区二区的视频

全國熱線服務:

News 當前位置:首頁 > News > News >

A brief discussion on what points should be paid attention to when selecting materials for high-precision cold drawn pipes

   The following points should be noted when selecting materials:
       1. When selecting materials, materials with low hardness and good plasticity are generally selected when strength is guaranteed;
       2、High precision cold drawn tubeThe specifications should be selected based on the specifications of the finished product to ensure that the elongation is within a specific range; if the elongation is too small, the strength of the surface of the finished product cannot be guaranteed; if the elongation is too large, it will be difficult to draw;
       3. There should be no serious defects such as pits, cracks, cracks, folds, scars, ovals, etc. on the surface of the material;
       4. It is better to choose products that have been left for 0.5~2a after hot rolling. The time is too short, and the surface corrosion of high-precision cold-drawn pipes is shallow. The time is too long, and the surface corrosion is too deep. These will lead to insufficient surface pretreatment, thus affecting the surface quality of the finished product.

上一篇:If the pipeline installation does not meet the requirements, oil leakage will occur if the rolled pipe is

下一篇:Let’s talk specifically about the characteristics of the surface heat treatment process of honing tubes.