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何晓波,等:回火温度对两相区淬火态40CrNiMo钢组织和力学性能的影响
断析出,并沿α铁素体晶界聚集粗化,针状α铁素体 [6] 谢波 . 34CrNiMo6 钢高承载曲轴热处理工艺研
的再结晶程度增大,原马氏体板条位向特征减弱。 究[D]. 太原:太原理工大学,2022.
(2)两相区淬火+回火后,随着回火温度由 XIE B. Study on heat treatment process of
34CrNiMo6 steel high load crankshaft[D]. Taiyuan:
570 ℃升高至 630 ℃, 试验钢的硬度由 203 HV降
Taiyuan University of Technology,2022.
低至194 HV,并且硬度低于完全淬火+回火的试
[7] 潘乐,王玲奇. 回火温度对40CrNiMo钢显微组织和力
验钢。
学性能的影响[J]. 热处理,2020,35(4):26-28.
(3) 回火温度的变化未对试验钢的低温冲击韧 PAN L,WANG L Q. Effect of tempering temperature
性产生显著影响, −20 ℃冲击吸收能量变化幅度在 on microstructue and mechanical property of 40CrNiMo
4~5 J;两相区淬火再回火试验钢的−20 ℃冲击吸 steel[J]. Heat Treatment,2020,35(4):26-28.
收能量高于完全淬火再回火试验钢。两相区淬火+ [8] 陈俊丹,莫文林,王培,等. 回火温度对42CrMo钢冲击
570~630 ℃回火后试验钢的冲击断口呈明显的韧性 韧性的影响[J]. 金属学报,2012,48(10):1186-1193.
断裂特征,断口上孔洞相比于完全淬火再回火试验 CHEN J D,MO W L,WANG P,et al. Effects of
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(4)两相区淬火态试验钢的最佳回火温度为
1186-1193.
630 ℃, 此时试验钢的冲击吸收能量为33 J,满足工
[9] 支龙,陈红斌,袁满,等 . 回火温度对淬火态
程应用要求,同时又具有较高的硬度(194 HV)。 40CrNiMoA钢组织与力学性能的影响[J]. 热加工工
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