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某一中载齿轮决定用45钢制造,其最终热处理采用下列哪种方案为宜(    )

单选题
2022-04-01 17:12
A、淬火+低温回火
B、渗碳后淬火+低温回火
C、调质后表面淬火
D、正火
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正确答案
C

试题解析

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