超高强度钢高速铣削表面完整性实验研究
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摘要
为了研究超高强度钢高速铣削过程中铣削参数对表面完整性的影响,本文基于正交实验法,采用涂层硬质合金刀片对16Co14Ni10Cr2Mo超高强度钢进行了高速铣削实验。分析了铣削速度、每齿进给量和铣削深度对三维表面粗糙度、表面残余应力和表面显微硬度的影响规律,并对铣削参数进行了优化。结果表明:三维表面粗糙度随铣削速度和每齿进给量增大而增大,随铣削深度的增大,呈现出先增大后降低的趋势;两个方向表面残余应力随铣削速度和铣削深度的增大而升高,垂直进给方向残余应力σ_y随每齿进给量的增大而升高,而沿进给方向残余应力σ_x呈现出先增大后降低的趋势;表面显微硬度随铣削速度υ_c的增大变化不大,随每齿进给量f_z和铣削深度a_p增大而降低;每齿进给量f_z对表面完整性影响最大;兼顾表面完整性和加工效率,最优铣削参数组合为:υ_c为150.7 m/min,f_z为0.02 mm/z,ap为1.0 mm。
In order to study the influence of milling parameters on surface integrity during the high-speed milling of ultra-high strength steel, high-speed milling experiments were carried out on ultra-high strength steel 16Co14Ni10Cr2Mo with coated carbide inserts based on orthogonal experimental method. The effects of milling speed,feed per tooth and milling depth on three-dimensional surface roughness,surface residual stress and surface microhardness were analyzed,and the milling parameters were optimized. The experimental results show that the three-dimensional surface roughness increases with the milling speed and the feed per tooth. As the milling depth increases,there is a trend of increasing first and then decreasing. The surface residual stress in both directions depends on the milling speed and milling depth. The increase of residual stress vertical to the feed direction σ_y increases with the increase of feed per tooth,while residual stress along the feed direction σ_x tends to increase first and then decrease; the surface microhardness does not change much with the increase of milling speed υ_c,but decreases with the increase of feed per tooth f_z and milling depth a_p; the feed per tooth f_z has the greatest influence on the surface integrity; with the surface integrity and machining efficiency considered,the optimal milling parameter combination is: υ_c is 150.7 m/min,f_z is 0.02 mm/z,and a_p is 1.0 mm.
In order to study the influence of milling parameters on surface integrity during the high-speed milling of ultra-high strength steel, high-speed milling experiments were carried out on ultra-high strength steel 16Co14Ni10Cr2Mo with coated carbide inserts based on orthogonal experimental method. The effects of milling speed,feed per tooth and milling depth on three-dimensional surface roughness,surface residual stress and surface microhardness were analyzed,and the milling parameters were optimized. The experimental results show that the three-dimensional surface roughness increases with the milling speed and the feed per tooth. As the milling depth increases,there is a trend of increasing first and then decreasing. The surface residual stress in both directions depends on the milling speed and milling depth. The increase of residual stress vertical to the feed direction σ_y increases with the increase of feed per tooth,while residual stress along the feed direction σ_x tends to increase first and then decrease; the surface microhardness does not change much with the increase of milling speed υ_c,but decreases with the increase of feed per tooth f_z and milling depth a_p; the feed per tooth f_z has the greatest influence on the surface integrity; with the surface integrity and machining efficiency considered,the optimal milling parameter combination is: υ_c is 150.7 m/min,f_z is 0.02 mm/z,and a_p is 1.0 mm.
引文
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[2]胡春东,孟利,董瀚.超高强度钢的研究进展[J].材料热处理学报,2016,37(11):178-183Hu C D,Meng L,Dong H. Research and development of ultra-high strength steels[J]. Transactions of Materials and Heat Treatment,2016,37(11):178-183(in Chinese)
[3]赵博,许广兴,贺飞,等.飞机起落架用超高强度钢应用现状及展望[J].航空材料学报,2017,37(6):1-6Zhao B,Xu G X,He F,et al. Present status and prospect of ultra high strength steel applied to aircraft landing gear[J]. Journal of Aeronautical Materials,2017,37(6):1-6(in Chinese)
[4] Remes H,Korhonen E,Lehto P,et al. Influence of surface integrity on the fatigue strength of high-strength steels[J]. Journal of Constructional Steel Research,2013,89:21-29
[5] Gerin B,Pessard E,Morel F,et al. Influence of surface integrity on the fatigue behaviour of a hot-forged and shotpeened C70 steel component[J]. Materials Science and Engineering:A,2017,686:121-133
[6]岳彩旭,刘献礼.高强度钢已加工表面完整性的研究进展[J].哈尔滨理工大学学报,2011,16(6):5-10Yue C X,Liu X L. Research progress of machined surface integrity for high stress steel cutting process[J].Journal of Harbin University of Science and Technology,2011,16(6):5-10(in Chinese)
[7] Liu G L,Huang C Z,Zou B,et al. Surface integrity and fatigue performance of 17-4PH stainless steel after cutting operations[J]. Surface and Coatings Technology,2016,307:182-189
[8] 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[J].Procedia CIRP,2018,71:267-271
[9]王欣,滕佰秋,曾惠元,等.表面完整性对C250型超高强度钢高周疲劳性能的影响[J].中国表面工程,2014,27(2):69-74Wang X,Teng B Q,Zeng H Y,et al. Effect of surface integrity on the high cycle fatigue property of C250 ultra-high strength steel[J]. China Surface Engineering,2014,27(2):69-74(in Chinese)
[10]王欣,胡云辉,曾惠元,等.结构应力集中和表面完整性对17-4PH钢轴向疲劳性能的影响[J].中国表面工程,2016,29(2):111-116Wang X, Hu Y H, Zeng H Y, et al. Effects of structural stress concentration and surface integrity on axial fatigue property of 17-4PH steel[J]. China Surface Engineering, 2016,29(2):111-116(in Chinese)
[11]李瑞鸿,刘道新,张炜,等.喷丸强化与表面完整性对300M钢疲劳性能的影响[J].机械科学与技术,2011,30(9):1418-1423Li R H,Liu D X,Zhang W,et al. Influence of shot peening and surface integrity on the fatigue properties of300M steel[J]. Mechanical Science and Technology for Aerospace Engineering,2011,30(9):1418-1423(in Chinese)
[12]罗智文,焦黎,赵文祥,等.58SiMn高强度钢车削表面完整性的试验研究[J].表面技术,2017,46(1):234-240Luo Z W,Jiao L,Zhao W X,et al. Experimental investigation of surface integrity in turning of high strength steel 58SiMn[J]. Surface Technology,2017,46(1):234-240(in Chinese)
[13] Yao C F,Tan L,Ren J X,et al. Surface integrity and fatigue behavior for high-Speed milling Ti-10V-2Fe-3Al titanium alloy[J]. Journal of Failure Analysis and Prevention,2014,14(1):102-112
[14] Javidi A,Rieger U,Eichlseder W. The effect of machining on the surface integrity and fatigue life[J]. International Journal of Fatigue,2008,30(10-11):2050-2055
[15]刘彦臣,庞思勤,王西彬,等.表面完整性对高强度钢疲劳寿命影响的试验研究[J].兵工学报,2013,34(6):759-764Liu Y C,Pang S Q,Wang X B,et al. Experimental study on effect of surface integrity on high-strength steel fatigue life[J]. Acta Armamentarii,2013,34(6):759-764(in Chinese)