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| iron nitride (Special alloy steels containing aluminium and other elements are heated in ammonia to about 500°C；the gas decomposes to a certain extent into hydrogen and nitrogen； the latter combines with the iron, forming particles of iron nitride which impart great hardness to the surface of the steel. 将含有铝和其他元素的特种合金钢在氨气中加热到500° C 左右，部分氨气分解成氢和氮，氮和铁结合生成的氮化铁微粒会大幅度提高钢的表面硬度。) | |||
| nitrided iron | |||
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氮 化铁 : 11 phrases in 4 subjects |
| Aviation | 1 |
| General | 2 |
| Metallurgy | 6 |
| Technology | 2 |
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