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Vol.22 No.3 赵国别等:化学镀-P合金的化学腐蚀磨损机理 -233 (4)理论探讨.由实验结果可以看出,化学镀 N-P合金的磨粒呈长而薄的磨粒微片剥层,表 现出疲劳磨损特征,可应用NP,Sh的剥层磨损 理论进行简单探讨.NP.Suh的磨损方程为: K-H△LAC+△C P (3) 式中,K为磨损因数,H为材料硬度,△L为表 面接触长度,d为裂纹深度,△C,△C.为裂纹两 端在N次循环中的平均裂纹扩展率,P为法向载 图5化学镀NP合金癌粒的双光图请(空气中, 荷,入为徽凸体间距,:为裂纹间距,结合实验 0.98N,60rmln) 数据,可计算出G105钢及化学镀Ni-P合金的 Fig5 Double lights photomicrograph of unlbricated.wear K值分别为:Kos=42×103,KN=9.6×10-,理 debris of Ni-P alloy in air(0.98 N,60 r/min) 论计算结果与实验测定值比较吻合,这也表明, 化学镀Ni-P合金主要为剥层磨损机理, 3结论 (I)无润滑磨损下,化学镀N-P合金不宜作 为G105钢抗化学腐蚀磨损的功能性镀层. (2)化学镀Ni-P合金在无润滑磨损下的磨 损主要为剥层磨损,并伴随少量磨粒磨损, 参考文献 图6化学缓N1P合金量散的双光图请(空气中985N, 1刘家谀,材料磨损原理及其耐磨性,北京:清华大学出 60r/main) 版社,1993.198 Fig.6 Double lights photomicrograph of unlubricated. 2 Mallory G O,Hajdo J B.Electroless Plating,Fundamental wear debris of Ni-P alloy in alr(9.85 N,60 r/min) and Applications.Orlando:ARSF,1990.6 3赵国刷,曹卫文,吴荫顺,等.一种新型腐蚀磨损试验 (3)X射线衍射分析,结果表明,无润滑条 装置的研制及应用.见:中国腐蚀与防护学会编.中 件下,磨粒已转变为NP,型的金属间化合物, 国腐烛与防护学会成立15周年论文集.北京,1994.11 主要包括NiP,NiP和Ni-P.这些金属间化合物 4赵国鹏.G105铜及其化学艘N1-P合金的腐蚀磨损行 的形成,表明摩擦表面温度在573K以上网.没有 为与机理:[学位论文].北京:北京科技大学,199 发现氧化物形成,说明化学镀Ni-P合金在空气 5李建明.磨损金属学,北京:冶金工业出版杜,1990.123 6 Peterson M B.Winer W O.Wear Control Handbook.New 中耐氧化的能力是较强的,同时也表明在空气 York:ASME,1980.501 无润滑状态下,化学镀N-P合金基本不发生氧 7罗守福,陈金品,王军.化学镀镍障镀层的X射线研 化磨损 究.见:全国首届化学镶会议论文集.南京.1992.92 Chemical Corrosive Wear Mechanism of Electroless Ni-P Coating ZHAO Guopeng",WU Yinshun".GU Zhengqiu.ZHU Rizhang 1)Anshan Institute of ron&Steel Techaology,Anshan114002,China 2)Material Sciencc and Engineering School,UST Beijing Beijing100083,China ABSTRACT The chemical corrosive wear mechanism of electroless Ni-P coating under unlubricated wear was studied by test and theory and the possibility of as an anti-chemical corrosive wear coating on drill pipe was probed into.The results showed that electroless Ni-P coating appear mainly delaminate wear and lightly abrasive wear under unlubricated wear.At the condition of unlubricated wear,it is not suited to eletroless Ni-P alloy as a protective coating on drill pipe. KEY WORDS eletroless plating;Ni-P alloy;unlubricated wear;delaminate wear
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