题目内容

High-speed steel is also___________________(know) as self-hardening steel.

查看答案

搜索结果不匹配？点我反馈

更多问题

The more carbon the steel contains and the (quick) cooling is, the __(hard) it becomes.

High carbon steel may be ____________________(harden) by heating it to a certain temperature and then quickly cooling in water.

Heat-resistant steel is made by ________________(add) some tungsten and molybdenum.

————（heat） it to a certain temperature and then quickly cooling in water may harden high carbon steel.