当材料被冲压成形时，会变硬，不同的钢材，变硬的程度不同。一般高强度低合金钢只略有20MPa增加，不到10%。注意：双相钢的屈服强度有140MPa增加，增加了40%多！金属在成形过程中，会变得完全不同，完全不像冲压加工开始之前。

When the material is formed by stamping, it will harden, different steel, different degree of hardening. Generally high strength low alloy steel only slightly increased 20MPa, less than 10%. Note: the yield strength of 140MPa steel increases with the increase of more than 40%! In the process of forming, the metal will be completely different.

这些钢材在受力后，屈服强度增加很多。材料较高的屈服应力加上加工硬化，等于流动应力的大大增加。因此，开裂、回弹、起皱、工件尺寸、模具磨损、微焊接磨损等成为了高强钢成型过

The yield strength of these steels increases with the stress. The higher yield stress of the material plus the work hardening is equal to the increase of the flow stress. Therefore, the cracking, rebound, wrinkling, workpiece size, die wear, micro welding wear and so on

经过前一段时间的快速反弹，上周国内钢材市场涨幅明显放缓，继续上涨动力减弱;在成交不畅的情况下，市场疲态渐现，加上期钢市场的持弱偏弱震荡，进一步加重商家观望心态，因此上周钢价窄幅震荡回落，供需双方均有一定的观望心态，因需求基本面受到南方雨水影响及商家在月底资金压力再现影响，预计短期内国内钢价还将继续震荡偏弱运行为主。程中的问题焦点。

After a quick rebound for a period of time before the last week, the domestic steel market price increase is slowing down, continue to rise in power weakened; poor turnover situation, the market weakness gradually, plus the steel market to weak weak shocks, further aggravating the business mentality, so last week, steel price shocks narrow down, both supply and demand a wait-and-see attitude, and influence by rain in the south of businesses in the end of the month due to financial pressure reproduction demand fundamentals, expected short-term domestic steel prices will continue to run the main weak shock. The focus of the problem.

济南永亚钢铁贸易有限公司的,济钢一级代理提供技术支持，更多精彩内容请进入：http://www.jnyygt.com，我们会倾情为您解答。

Ji'nan YONGYA steel trade Co. Ltd., to provide technical support to Jinan level agents, more exciting content, please enter: http://www.jnyygt.com, we will love to answer your questions.