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2019大学慕课答案 有机化学A(天津大学) 最新大学MOOC满分章节测试答案
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本课程起止时间为:2020-09-04到2021-01-15
本篇答案更新状态:已完结
【作业】Heat treatment of steel 作业
1、 问题:1. We can alter the characteristics of steel in various ways.翻译2. Secondly, we can heat the steel above a certain critical temperature, and then allow it to cool at different rates.翻译3. We heat the steel above the critical temperature and permit it to cool very slowly.翻译4. Metal which we cause to cool rapidly contracts more rapidly on the outside than on the inside. 翻译5. We therefore heat it again to a temperature below the critical temperature, and cool it slowly. 翻译
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