black nail wire是什么意思

用法例句

The reason of failure of GCr15 nail die is analyzed in detail by means of failure analysis and the study on mechanism of embrittlement.

通过失效分析和脆断机理研究,对制钉模的失效原因进行了深入分析,在此基础上对复合处理工艺进行了改进;改进后复合处理的GCr15钢制钉模具有较高的强度和韧性,基本上避免了早期脆性断裂。

The results of the fracture torpor logy analysis and microstructure investigation show that the brittle fracture of nail die belongs to tempered brittleness, and the brittleness will be increased when the retained astatine is transformed into martensite .

采用扫描电镜、透射电镜及X射线衍射等方法 ,对复合强韧化处理CrWMn制钉模的组织形貌及断口特征进行了观测分析 ,由此对其脆性断裂机理进行了研究 。

The consist and principle of PLC control system of automatic nail_making machine are presented.

介绍了自动制钉机PLC控制系统的组成及工作原理 ,分析并研究了系统的软硬件结构 ,分别给出了硬件电路结构图和软件程序框