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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。
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                 (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
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              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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                                                                     1186-1193.
              630 ℃, 此时试验钢的冲击吸收能量为33 J,满足工
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              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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