不同应力状态下硬面涂层材料的疲劳强度
Fatigue Strength of Hard Coating in Different Stress States
摘 要
采用弯曲疲劳和拉-压疲劳试验,比较了45钢基体上真空熔覆镍基合金/WC复合涂层试样在不同应力状态下的疲劳强度,并与45钢基体材料进行了对比.结果表明：在弯曲疲劳时,在相同寿命的条件下,正火后涂层试样比无涂层试样的承载能力提高80 MPa左右;当N<3×104时拉-压疲劳时,涂层试样的疲劳强度小于无涂层试样,而N>3×104时拉-压疲劳时,则相反;在相同寿命的条件下,涂层试样的弯曲疲劳强度比拉-压疲劳大75 MPa左右,而无涂层试样则大25 MPa左右.
镍基合金/WC复合涂层
真空熔覆
fatigue strength
Ni base alloy/WC composite coating
vacuum melting
Abstract
By means of bend fatigue tests and push-pull fatigue tests,the fatigue strength of Ni base-WC composite coating specimens was compared in different stress states.Under bend-rotation fatigue,fatigue strength of coating specimens was 80 MPa more than that of uncoated specimens in the same fatigue life.Under push-pull fatigue,in N<3×104,fatigue strength of coating specimens was higher than that of uncoated specimens,but in N>3×104,it was contrary.The bend-rotation fatigue strength of coatings and uncoated specimens was 75MPa and 25 MPa,respectively,more than the push-pull fatigue strength.
中图分类号 TG174.4
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收稿日期 2005/5/7
修改稿日期 2005/7/15
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备注林晨(1962-),男,江西南昌人,副教授,博士.
引用该论文: LIN Chen. Fatigue Strength of Hard Coating in Different Stress States[J]. Materials for mechancial engineering, 2006, 30(6): 74～76
林晨. 不同应力状态下硬面涂层材料的疲劳强度[J]. 机械工程材料, 2006, 30(6): 74～76
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参考文献
【1】林晨,黄新波,林化春,等.真空熔烧Co基合金-WC复合涂层耐磨性研究[J].机械工程材料,2003,27(6):40-42.
【2】王俊英,闫石,焦耀斌.真空熔烧镍基合金-碳化钨复合涂层抗热疲劳性能的研究[J].热加工工艺,2001,(1):14-16.
【3】Sobolev V V,Guilemany J M,Miguel J R,et al.Investigation of the development of coating structure during high velocity oxy-fuel(HVOF) spraying of WC-Ni powder particles[J].Surface and Coating technology,1996,82:114-120.
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【6】林晨,王德俊,林化春,等.镍基-碳化铬硬面涂层的疲劳强度[J].钢铁研究学报,2002,14(6):69-71.
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【9】李志超,董允.WC-Co YG13C硬质合金热处理工艺研究[J].机械工程材料,1991,25(4):43-48.
【2】王俊英,闫石,焦耀斌.真空熔烧镍基合金-碳化钨复合涂层抗热疲劳性能的研究[J].热加工工艺,2001,(1):14-16.
【3】Sobolev V V,Guilemany J M,Miguel J R,et al.Investigation of the development of coating structure during high velocity oxy-fuel(HVOF) spraying of WC-Ni powder particles[J].Surface and Coating technology,1996,82:114-120.
【4】Stewart D A,Shipway P H,McCartney D G.Abrasive wear behaviour of conventional and nanocomposite HVOF-sprayed WC-Co coatings[J].Wear,1999,225-229:789-798.
【5】林化春,丁润刚.镍基合金-碳化铬复合涂层固体界面的结合问题[J].钢铁研究学报,1996,8(1):33-36.
【6】林晨,王德俊,林化春,等.镍基-碳化铬硬面涂层的疲劳强度[J].钢铁研究学报,2002,14(6):69-71.
【7】林晨.调质对钴基碳化钨复合涂层疲劳强度的影响[J].表面技术,2004,33(5):22-23.
【8】林晨.调质对Ni基合金+WC复合涂层疲劳强度的影响[J].兵器材料科学与工程,2004,27(1):30-34.
【9】李志超,董允.WC-Co YG13C硬质合金热处理工艺研究[J].机械工程材料,1991,25(4):43-48.
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