Microstructure and Performance of Electrical-discharge Strengthened Layer on the Surface of U70MnSi and 40Cr Steels
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摘要: 采用硬质合金YG-8和焊条FW-1101作电极,在电火花表面强化器上强化了U70MnSi钢和40Cr钢的表面;用X射线衍射仪分析了强化层的结构,用滚动和滚、滑磨损试验研究了强化层的耐磨性,用阳极极化和浸泡试验研究了40Cr钢表面强化后的耐腐蚀性能.结果表明:强化层是由化合物和非晶组织组成的混合层;表面强化后试样的耐磨性明显提高;40Cr强化层的混合组织对耐腐蚀性能的影响超过了层中缺陷和残余应力的影响,使其耐腐蚀性能提高.Abstract: The surface of U70MnSi and 40Cr were strengthened by a self-made electrical discharge surface strengthening equipment.Hard alloy YG-8 was used as surface coating materials for U70MnSi steel,and FW-1101 welding electrode for 40Cr steel.Composition of strengthened layer was analyzed by XRD.The wear resistance of strengthened layer was investigated by utilization of rolling-wear and rolling-sliding wear.After surface strengthened of 40Cr,the corrosion resistance was examined by anodic polarization and immersion.The results show that strengthened layer of two steels are mixture structure which composed of compound and amorphous structure.Wear resistance of two steels are considerably improved after strengthened under rolling-wear and rolling-sliding wear conditions.Effects of surface mixture structure exceed those of defects and residual stress in strengthened layer,which make corrosion resistance of 40Cr strengthened layer increased.
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Keywords:
- electrical spark /
- U70MnSi steel /
- 40Cr steel /
- surface strengthening
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[1] 刘启跃,张波,周仲荣.铁路钢轨损伤机理研究[J].中国机械工程,2002,13(18):1596-1600. [2] 刘长恩,岳金权.双螺旋辊式新型磨浆机及其应用[J].中国造纸,2000,(6):21-23. [3] 王振民.电火花表面强化技术研究[D].沈阳:沈阳工业大学,1999. [4] 沈德久.50CrMoV钢脉冲放电涂层的激光重熔[J].复合材料学报,1997,14(4):147-150. [5] 潘国顺,曲敬信,邵荷生.电火花表面强化工艺对涂层组织性能的影响[J].机械工程材料,2000,24(3):24-27. [6] 王振民,黄石生.电火花表面强化技术发展概论[J].工具技术,2000,34(5):3-5. [7] 李建忱,马丽杰,于燕.Al-Mn非晶合金镀层[J].中国有色金属学报,1997,7(1):172-175. [8] 王建升,王华昆,钟毅,等.H13钢电火花沉积层组织结构的研究[J].中国表面工程,2003,6(63):27-30. [9] 乔生儒,韩栋,李玫.钢铁表面电火花淬火超细组织化及机理[J].机械工程材料,2004,28(8):7-9. [10] 王引真,孙永兴,宋玉强,等.等离子喷涂Al2O3涂层腐蚀失效机制[J].腐蚀科学与防护技术,2002,14(4):227-231.
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