钢铁知识大全

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第-节.钢材机械性能介绍.................................................................................4
- .屈服点（σ s ）......................................................................................4
二 .屈服强度（σ 0.2）...............................................................................4
三 .抗拉强度（σ b）..................................................................................4
四 .伸长率（δs ）.......................................................................................4
五 .屈强比（σ s/ σ b）.................................................................................4
六 .硬度......................................................................................................4
1. 布氏硬度（HB）.............................................................................4
2. 洛氏硬度（HR）.............................................................................5
3. 维氏硬度（HV）.............................................................................5
七 .强度......................................................................................................5
八 .刚度......................................................................................................5
第二节.钢的分类...................................................................................................6
- .黑色金属和有色金属..........................................................................6
1. .黑色金属..........................................................................................6
2. .有色金属..........................................................................................6
二 .钢的分类..............................................................................................6
1. 按品质分类.......................................................................................6
2. 按化学成份分类...............................................................................6
3. 按成形方法分类：...........................................................................6
4. 按金相组织分类...............................................................................7
5. 按用途分类.......................................................................................7
6. 综合分类...........................................................................................7
7. 按冶炼方法分类...............................................................................7
第三节.我国钢号表示方法...................................................................................8