·1350 工程科学学报.第42卷,第10期 3.5 3.5 ()R=0.545m Depth/um (6R=1.763m Depth/um 3.0 3.6 3.0 3.0 35 6 2.5 2.0 1.0 2.0 0 1.5 1.0 -1.0 1.0 0.5 -2.0 0.5 0 3.1 0 00.51.01.52.02.53.03.54.04.5 00.51.01.52.02.53.03.54.04.5 x/mm x/mm 3.5 (c)R=1.041m Depth/um (d) Depth/um 3.0》%》 5.0 ■6.634 5 4.0 30 3.0 2.0 1.5 116 1.0 1.0 0 2.32 0.5 -1.0 x/mm 3.47 0 -2.3 -4.265 00.51.01.52.02.53.03.54.04.5 x/mm 4.63 图9三种试样切削20min后表面宏观形貌.(a)回火马氏体:(b)粒状贝氏体:(c)下贝氏体:(d)粒状贝氏体3D形貌 Fig.9 Milling surface of three specimens for 20 min at the cutting speed of 145 m'min:(a)tempered martensite;(b)grain bainite;(c)low bainite; (d)3D morphology of grain bainite 组织比切削回火马氏体组织的刀具使用寿命高 microstructure and mechanical properties on the machinability of 30%~40%.当切削速度高于165mmin时,回火 martensitic and bainitic prehardened mould steels.IntJ Mater Res, 马氏体组织比贝氏体组织更易切削 2013,104(8):748 [6]Zhang S H.Study on 1CrMn2MoVTiB Non-Quenched and (2)马氏体组织具有最佳的切削表面粗糙度 Tempered Plastic Mould Steel[Dissertation].Shenyang: 粒状贝氏体组织切削加工表面由于严重的刀具黏 Northeastern University,2010 附现象而出现背脊纹路,影响了粗糙度 (章顺虎.1CrM2 MoVTiB非调质塑料模具钢使用性能的研究 (3)综合考虑之下,三种组织的综合切削性能 [学位论文],沈阳:东北大学,2010) 从高到低排序为:下贝氏体组织、马氏体组织、粒 [7] Hoseiny H,Hogman B,Klement U,et al.Machinability evaluation 状贝氏体组织.采用300℃等温淬火工艺可以有 of pre-hardened plastic mould steels.Int J Machin Machinab 效提升718塑料模具钢的综合切削性能 Ma1er,2012,11(4):327 [8] Huang W M,Zhao J,Niu J T,et al.Comparison in surface 参考文献 integrity and fatigue performance for hardened steel ball-end milled with different milling speeds.Procedia C/RP,2018,71: [1]Min Y A,Yang Y P,Zhang Z,et al.Study on machinability of pre- 267 hardened plastic mould steel.Adv Mater Res,2013,690-693:2501 [9] Xavior M A,Manohar M,Madhukar P M,et al.Experimenta [2] Hoseiny H,Caballero F G,Hogman B,et al.The effect of the investigation of work hardening,residual stress and microstructure martensitic packet size on the machinability of modified AISI P20 during machining Inconel 718.J Mech Sci Technol,2017.31(10): prehardened mold steel.J Mater Sci,2012,47(8):3613 4789 [3]Cao Y J.Sun J Q,Ma F,et al.Effect of the microstructure and [10]Garcia-Mateo C,Peet M,Caballero F G,et al.Tempering of hard residual stress on tribological behavior of induction hardened mixture of bainitic ferrite and austenite.Mater Sci Technol,2004. GCr15 steel.Tribol Int,2017,115:108 20(7):814 [4]Nomani J.Pramanik A.Hilditch T,et al.Chip formation [11]Zhang Z,Wu X C,Zhou Q,et al.Effect of microstructure on the mechanism and machinability of wrought duplex stainless steel impact toughness of a bainitic steel bloom for large plastic molds. alloys.Int J Ady Manuf Technol,2015,80:1127 Int J Miner Metall Mater,2015,22(8):842 [5]Hoseiny H,HoGman B,Andren H,et al.The influence of [12]Fujita N,Ishikawa N,Roters F,et al.Experimental-numerical组织比切削回火马氏体组织的刀具使用寿命高 30%~40%. 当切削速度高于 165 m·min–1 时,回火 马氏体组织比贝氏体组织更易切削. (2)马氏体组织具有最佳的切削表面粗糙度. 粒状贝氏体组织切削加工表面由于严重的刀具黏 附现象而出现背脊纹路,影响了粗糙度. (3)综合考虑之下,三种组织的综合切削性能 从高到低排序为:下贝氏体组织、马氏体组织、粒 状贝氏体组织. 采用 300 ℃ 等温淬火工艺可以有 效提升 718 塑料模具钢的综合切削性能. 参 考 文 献 Min Y A, Yang Y P, Zhang Z, et al. Study on machinability of prehardened plastic mould steel. Adv Mater Res, 2013, 690-693: 2501 [1] Hoseiny H, Caballero F G, Hogman B, et al. The effect of the martensitic packet size on the machinability of modified AISI P20 prehardened mold steel. J Mater Sci, 2012, 47(8): 3613 [2] Cao Y J, Sun J Q, Ma F, et al. Effect of the microstructure and residual stress on tribological behavior of induction hardened GCr15 steel. Tribol Int, 2017, 115: 108 [3] Nomani J, Pramanik A, Hilditch T, et al. Chip formation mechanism and machinability of wrought duplex stainless steel alloys. Int J Adv Manuf Technol, 2015, 80: 1127 [4] [5] Hoseiny H, HoGman B, Andrén H, et al. The influence of microstructure and mechanical properties on the machinability of martensitic and bainitic prehardened mould steels. Int J Mater Res, 2013, 104(8): 748 Zhang S H. Study on 1CrMn2MoVTiB Non-Quenched and Tempered Plastic Mould Steel[Dissertation]. Shenyang: Northeastern University, 2010 (章顺虎. 1CrMn2MoVTiB非调质塑料模具钢使用性能的研究 [学位论文]. 沈阳: 东北大学, 2010) [6] Hoseiny H, Högman B, Klement U, et al. Machinability evaluation of pre-hardened plastic mould steels. Int J Machin Machinab Mater, 2012, 11(4): 327 [7] Huang W M, Zhao J, Niu J T, et al. Comparison in surface integrity and fatigue performance for hardened steel ball-end milled with different milling speeds. Procedia CIRP, 2018, 71: 267 [8] Xavior M A, Manohar M, Madhukar P M, et al. Experimental investigation of work hardening, residual stress and microstructure during machining Inconel 718. J Mech Sci Technol, 2017, 31(10): 4789 [9] Garcia-Mateo C, Peet M, Caballero F G, et al. Tempering of hard mixture of bainitic ferrite and austenite. Mater Sci Technol, 2004, 20(7): 814 [10] Zhang Z, Wu X C, Zhou Q, et al. Effect of microstructure on the impact toughness of a bainitic steel bloom for large plastic molds. Int J Miner Metall Mater, 2015, 22(8): 842 [11] [12] Fujita N, Ishikawa N, Roters F, et al. Experimental –numerical 0 0.5 1.0 1.5 2.0 2.5 x/mm (a) Ra=0.545 μm y/mm 3.0 3.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Depth/μm 3.6 3.0 2.0 1.0 0 −1.0 −2.0 −3.1 0 0.5 1.0 1.5 2.0 2.5 x/mm (c) Ra=1.041 μm y/mm 3.0 3.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Depth/μm 5.0 4.0 3.0 2.0 1.0 0 −1.0 −2.3 0 0.5 1.0 1.5 2.0 2.5 x/mm (b) Ra=1.763 μm y/mm 3.0 3.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Depth/μm 7 6 4 2 0 −2 −4 (d) 1.16 2.32 3.47 4.63 Depth/μm 6.634 −4.265 x/mm 图 9 三种试样切削 20 min 后表面宏观形貌. (a)回火马氏体;(b)粒状贝氏体;(c)下贝氏体;(d)粒状贝氏体 3D 形貌 Fig.9 Milling surface of three specimens for 20 min at the cutting speed of 145 m·min–1: (a) tempered martensite; (b) grain bainite; (c) low bainite; (d) 3D morphology of grain bainite · 1350 · 工程科学学报,第 42 卷,第 10 期