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| temper brittlementbrittleness | |||
| temper brittleness; temper embrittlement; temper brittlement (【技】淬硬钢在一定温度区间回火或回火冷却中缓慢通过一定温度区间而引起韧性降低的现象。有两种回火脆性：①不可逆回火脆性。淬硬钢在 250 ~ 400°C 温度区间回火引起的脆性，又叫低温回火脆性，即第一类回火脆性。②可逆回火脆性。某些合金钢在 450 ~ 525°C 温度区间回火时产生的脆性，又叫高温回火脆性，即第二类回火脆性。) | |||
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回火 脆性 : 4 phrases in 2 subjects |
| Automobiles | 2 |
| Metallurgy | 2 |
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