The influence of quenching and tempering temperature on the microstructure and mechanical properties of ER5 steel was studied. The experimental results show that improve quenching temperature can obviously increase the ER5 steel second sclerosis ability, but can lead to toughness becomes poor. Relative to ER5 steel production in common use in the actual "high quenching high tempering " technology, using quenching at 1090℃ and tempering at 500℃~530℃ such a "low quenching low tempering" technology, also can obtain good comprehensive mechanical properties.研究了淬火、回火温度对ER5钢组织和力学性能的影响。结果表明，提高淬火温度能明显增加ER5钢的二次硬化能力，但会导致韧性变差。相对于ER5钢生产实际中常用的“高淬高回”工艺，采用1090℃淬火，500℃~530℃回火的“低淬低回”工艺，也能取得良好的综合力学性能。- -！我是学金属热处理的，这是我小论文部分的摘要，望采纳
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