[1]赵利民*,王树凤. 硝酸镧浓度对齿轮钢表面锰系复合磷化膜性能的影响 [J].电镀与精饰,2022,(10):1-8.[doi:10.3969/j.issn.1001-3849.2022.10.001]
　ZHAO Limin*,WANG Shufeng.Effect of Lanthanum Nitrate Concentration on Properties of Manganese Composite Phosphating Films on Surface of Gear Steel[J].Plating & Finishing,2022,(10):1-8.[doi:10.3969/j.issn.1001-3849.2022.10.001]
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硝酸镧浓度对齿轮钢表面锰系复合磷化膜性能的影响

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《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2022年10
页码:
1-8
栏目:
出版日期:
2022-10-17

文章信息/Info

Title:
Effect of Lanthanum Nitrate Concentration on Properties of Manganese Composite Phosphating Films on Surface of Gear Steel
作者:
（1.扬州工业职业技术学院，江苏 扬州 225017； 2.扬州力创机床有限公司，江苏 扬州 225017）
Author(s):
（1.Yangzhou Polytechnic Institute， Yangzhou 225017， China； 2.Yangzhou Super Machine Tool Co.， Ltd.， Yangzhou 225017， China）
关键词:
锰系复合磷化膜; 硝酸镧浓度; 硬度; 耐磨性能; 耐腐蚀性能
Keywords:
manganese composite phosphating film ;  lanthanum nitrate concentration ;  hardness ;  wear resistance ;  corrosion resistance
分类号:
TB43
DOI:
10.3969/j.issn.1001-3849.2022.10.001
文献标志码:
A
摘要:
为进一步改善锰系复合磷化膜的耐磨性能和耐腐蚀性能，从而为齿轮钢提供更好的抗磨损和腐蚀防护作用，选用硝酸镧作为促进剂添加到磷化液中，在齿轮钢表面制备锰系复合磷化膜。研究了硝酸镧浓度对锰系复合磷化膜的微观形貌、聚四氟乙烯（ PTFE ）颗粒质量分数、厚度、硬度、耐磨性能和耐腐蚀性能的影响。结果表明：硝酸镧浓度为 60 mg/L 时制备的锰系复合磷化膜晶粒细化，致密性较好， PTFE 颗粒质量分数、厚度和硬度分别达到 6.2 % 、 11.8 μ m 、 310.4 HV ，表现出优良的耐磨性能和耐腐蚀性能。该锰系复合磷化膜的摩擦系数和磨损失重相比于齿轮钢都降低了 30 % ，腐蚀电流密度相比于齿轮钢降低了近两个数量级，可以为齿轮钢提供更好的抗磨损和腐蚀防护作用。在一定范围内硝酸镧浓度增加促使锰系复合磷化膜的晶粒细化，致密性逐步改善，同时促进 PTFE 颗粒伴随着磷化膜沉积起到自润滑减摩作用，有效地改善锰系复合磷化膜的耐磨性能。另外， PTFE 颗粒伴随着磷化膜沉积较好地填充晶粒间空隙，使锰系复合磷化膜发生电化学腐蚀反应的难度增加，腐蚀倾向减弱。
Abstract:
： In order to further improve the wear resistance and corrosion resistance of manganese composite phosphating film ， so as to provide better anti-wear and corrosion protection for gear steel ， the manganese composite phosphating film on the surface of gear steel was prepared by adding lanthanum nitrate as accelerator into the phosphating solution. The effects of lanthanum nitrate concentration on the microstructure ， mass fraction of polytetrafluoroethylene （ PTFE ） particles ， thickness ， hardness ， wear resistance and corrosion resistance of manganese composite phosphating films were studied. The results showed that when the lanthanum nitrate concentration was 60 mg/L ， the obtained manganese composite phosphating film had finer grains and better compactness. And the mass fraction of PTFE particles ， thickness and hardness reached 6.2 % ， 11.8 μ m and 310.4 HV ， respectively ， showing excellent wear resistance and corrosion resistance. The films can provide better wear and corrosion protection for gear steel ， the friction coefficient and wear loss were reduced by 30 % compared with that of gear steel ， and the corrosion current density was reduced by nearly two orders of magnitude compared with that of gear steel. The increase of lanthanum nitrate concentration in a certain range can promote the grain refinement of the manganese composite phosphating film ， and the compactness was gradually improved. Moreover ， lanthanum nitrate promoted PTFE particles to fill the intergranular gaps accompanied by phosphating film deposition ， which can effectively hinder the corrosion ， reduce the corrosion tendency and improve the wear resistance of manganese phosphating film.

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备注/Memo

备注/Memo:
收稿日期： 2022-06-22 修回日期： 2022-07-10 作者简介： 赵利民（ 1971 —），男，硕士，副教授， email ： zhao_225017@163.com 基金项目： 国家高等职业教育创新发展行动计划机械设计与制造骨干专业建设项目（ SM1 ）
更新日期/Last Update: 2022-11-10