干喷工艺对高速钢M42-弹簧钢D6A双金属带锯条性能的影响
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摘要
通过二元影像测量仪观察锯条干喷处理后的表面压应力、覆盖率、齿尖状况,不磨合锯切GCr15棒材的齿尖崩刃情况和锯切45~#钢和空转疲劳寿命试验研究表面处理干喷砂工艺参数(压缩空气压力0.1~0.4 MPa,运行速度4~1 m/min)对M42(/%:1.08C,1.5W,9.4Mo,3.8Cr,1.2V,8.0Co)-D6A(/%:0.48C,1.0Mo,1.1Cr,0.1V,0.6Ni)双金属带锯条性能的影响。结果表明,锯条经合适的参数-压缩空气压力0.3 MPa和运行速度3m/min,背部表面覆盖率达到100%,干喷后,齿尖形成稳定的圆角,承受切割和振动的冲击力,以提高锯条齿尖的耐磨性,齿部的平均使用寿命提高66%,背部疲劳试验寿命提高45%~70%。
The influence of parameters of shot peening process for surface treatment(compressed air pressure 0. 1~0.4 MPa, running speed 4~1 m/min) on performance of M42(/%: 1.08 C,1.5 W,9. 4 Mo,3. 8 Cr,1.2 V,8. OCo)-D6 A(/% : 0. 48 C, 1.0 Mo, 1. 1 Cr, 0. 1 V, 0. 6 Ni) bi-metal band-saw blade has been studied by binary image measuring instrument to observe surface compression stress, blade back shot peening coverage rate and tooth tip condition, and tooth tip fracture condition as non-fitting cutting steel GCr15 bar products and fatigue life of blade back with cutting steel 0. 45 C and idling fatigue test after shot peening treatment of blade. The results show that with suitable shot peening process-compressed air pressure 0. 3 MPa, running speed 3 mm/min and blade back shot peening coverage rate reach 100%, after shot peening the stable rounded comer of tooth tip is formed to bear the impact force produced by cutting and vibrating and improve the wear resistance of band-saw blade tooth tip, the average service life of teeth increases by 66% and the tested fatigue life of band-saw blade back increases by 45%~70%.
The influence of parameters of shot peening process for surface treatment(compressed air pressure 0. 1~0.4 MPa, running speed 4~1 m/min) on performance of M42(/%: 1.08 C,1.5 W,9. 4 Mo,3. 8 Cr,1.2 V,8. OCo)-D6 A(/% : 0. 48 C, 1.0 Mo, 1. 1 Cr, 0. 1 V, 0. 6 Ni) bi-metal band-saw blade has been studied by binary image measuring instrument to observe surface compression stress, blade back shot peening coverage rate and tooth tip condition, and tooth tip fracture condition as non-fitting cutting steel GCr15 bar products and fatigue life of blade back with cutting steel 0. 45 C and idling fatigue test after shot peening treatment of blade. The results show that with suitable shot peening process-compressed air pressure 0. 3 MPa, running speed 3 mm/min and blade back shot peening coverage rate reach 100%, after shot peening the stable rounded comer of tooth tip is formed to bear the impact force produced by cutting and vibrating and improve the wear resistance of band-saw blade tooth tip, the average service life of teeth increases by 66% and the tested fatigue life of band-saw blade back increases by 45%~70%.
引文
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[3]Nawaz K F,Sarwar M and Persson M.Cutting Energy and Wear in Bandsawing Operation When Cutting Ti-6Al-4V Alloy[C]//International Conference on Flexible Automation and Intelligent Manufacturing.Newcastle:Northumbria University,2009:865-872.
[4]Sarwar M,Persson M and Hellbergh,et al.Measurement of Specific Cutting Energy for Evaluating the Efficiency of Bandsawing Different Workpiece Materials[J].International Journal of Machine Tools and Manufacture,2009,49(12):958-965.
[5]Sarwar M,Persson M and Hellbergh H.Wear and Failure Modes in the Bandsawing Operation When Cutting Ball-Bearing Steel[J].Wear,2005,259(7):1144-1150.
[6]Sarwar M,Persson M and Hellbergh H.Wear of the Cutting Edge in the Bandsawing Operation When Cutting Austenitic 17-7 Stainless Steel[J].Wear,2007,263(7):1438-1441.
[7]Anderson R A.Mathod of Making Band Saw Blade:US,3315548[P].1967-04-25.
[8]陈刚,杨全毅,周明哲,等.M42/X32异种金属CO_2激光焊接接头组织和性能的研究[J].湖南大学学报(自然科学版),2013,40(11):89-95.
[9]杨全毅,王娟,刘发安,等.异种钢焊接接头退火工艺研究-焊缝性能与保温时间[J].电焊机,2015,45(8):26-31.
[10]Sarwar M and Haider J.Aspects of Burr Formation in Bandsaw Teeth Manufactured by Milling Operation[J].Robotics and Computer-Integrated Manufacturing,2010,26(6):596-601.
[11]韩季初,李辉,李栋梁,等.双金属锯带的单炉多次循环回火热处理方法:中国,200810031785.3[P].2009-11-18.
[12]卢斌,易丹青,刘沙,等.超高强度钢TRm80的深冷处理[J].钢铁研究学报,2000,12(4):31-35.
[13]陈刚,王琼霜,韩季初,等.深冷及回火处理对高速钢M42组织和力学性能影响[J].湖南大学学报(自然科学版),2012,39(4):53-58.
[14]Haydenr C.Saw Blade:US,5603252[P].1997-02-18.
[15]Cranna M T.Structural Saw Blade:US,US6601495B2[P].2003-08-05.
[16]Tsujimoto S.Band Saw Blade:US,US D438549S[P].2001-03-06.