不同保温时间对AT13涂层摩擦学性能的影响
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摘要
采用等离子喷涂技术在20钢表面制备Al_2O_3-Ti O_2涂层,对所制备的涂层进行500℃保温1 h、3 h、5 h热处理。利用QG-700型摩擦磨损试验机对涂层进行摩擦磨损性能试验。利用显微硬度计、扫描电镜(SEM)和X射线衍射仪(XRD)对涂层的组织性能、力学性能及摩擦磨损性能进行表征。研究结果表明:原始粉末中主要为Al_2O_3和Al_2Ti O_5相,喷涂后生成Ti O新相。热处理后涂层无新相生成,显微硬度有所降低,摩擦因数有所提高,达到稳定磨损阶段的时间缩短,涂层的磨痕宽度较未热处理时变窄、变浅。热处理降低了涂层的磨损率,随着保温时间的延长,磨损率降低幅度减小。热处理前后涂层均存在磨屑和剥落坑,主要磨损机制为剥落。在本试验条件下,保温时间为5 h时,涂层的耐磨性最好。
Plasma spraying technology was utilized to deposit Al_2 O_3-Ti O_2 coatings on 20 steel samples. The prepared coating was heat-treated at 500 ℃ for 1 h,3 h and 5 h. The friction and wear performance of coatings were tested by QG-700 friction and wear tester. The microstructures,microhardness and phase compositions of the coatings were investigated by scanning electron microscopy,microhardness tester and X-ray diffraction,respectively. The results indicate that the original powders are mainly Al_2 O_3 and Al_2 Ti O_5 phases. Ti O is a new phase formed after spraying. The heat treatment does not change the phase composition of the coating. After heat treatment the microhardness of the coating decreases and the friction factor increases. The time for the coating to reach a stable wear stage after heat treatment is shortened. The wear marks of the coatings after heat treatment become lighter than those of the non-heat treated coatings. Heat treatment can reduce the wear rate of the coatings. The untreated and heat-treated coatings have wear debris and exfoliation pits. The main wear mechanism of the coating is exfoliation. Under the experimental conditions,the wear resistance of the coating is the best when the holding time is 5 h.
Plasma spraying technology was utilized to deposit Al_2 O_3-Ti O_2 coatings on 20 steel samples. The prepared coating was heat-treated at 500 ℃ for 1 h,3 h and 5 h. The friction and wear performance of coatings were tested by QG-700 friction and wear tester. The microstructures,microhardness and phase compositions of the coatings were investigated by scanning electron microscopy,microhardness tester and X-ray diffraction,respectively. The results indicate that the original powders are mainly Al_2 O_3 and Al_2 Ti O_5 phases. Ti O is a new phase formed after spraying. The heat treatment does not change the phase composition of the coating. After heat treatment the microhardness of the coating decreases and the friction factor increases. The time for the coating to reach a stable wear stage after heat treatment is shortened. The wear marks of the coatings after heat treatment become lighter than those of the non-heat treated coatings. Heat treatment can reduce the wear rate of the coatings. The untreated and heat-treated coatings have wear debris and exfoliation pits. The main wear mechanism of the coating is exfoliation. Under the experimental conditions,the wear resistance of the coating is the best when the holding time is 5 h.
引文
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[19]王召煜,李国禄,王海斗,等.超音速等离子喷涂Fe Cr BSi涂层组织和残余应力分析[J].材料热处理学报,2012,33(1):146-149.
[20]孙渊,张栋,午丽娟,等.材料残余应力对硬度测试影响程度的分析[J].华东理工大学学报(自然科学版),2012,38(5):652-656.
[21]肖志超,陈青华,金志浩,等.热处理温度对碳纤维增强碳复合材料摩擦学性能的影响[J].硅酸盐学报,2008,36(8):1153-1158.
[22]安家财,杜三明,肖宏滨,等.等离子喷涂Zr O2/Al2O3陶瓷涂层的摩擦磨损性能[J].中国表面工程,2011,24(1):20-24,88.
[23]石晓轩.T10表面不同喷涂层微观组织及耐磨性研究[D].秦皇岛:燕山大学,2016.
[2]王泽.等离子喷涂Ni Cr BSi涂层磨损/疲劳竞争失效机理与规律研究[D].天津:河北工业大学,2015.
[3]路学成.等离子喷涂纳米氧化铝基陶瓷涂层制备及性能研究[D].天津:河北工业大学,2015.
[4]张建新.等离子喷涂纳米结构Al2O3-13wt.%Ti O2涂层组织及性能研究[D].天津:河北工业大学,2007.
[5]袁建辉,祝迎春,雷强,等.等离子喷涂制备WC-Co-Cu-BaF2/Ca F2自润滑耐磨涂层及其高温摩擦性能[J].中国表面工程,2012,25(2):31-36.
[6]SINGH P V,SIL A,JAYAGANTHAN R.A study on sliding and erosive wear behaviour of atmospheric plasma sprayed conventional and nanostructured alumina coatings[J].Materials&design,2011,32(2):584-591.
[7]YAO S H.Comparative study on wear performance of traditional and nanos tructured Al2O3-13 wt.%Ti O2air plasma spray coatings[J].Ceramics silikaty,2015,59(1):59-63.
[8]DHAKAR B,CHATTERJEE S,SABIRUDDIN K.Linear reciprocating wear behaviour of plasma-sprayed Al2O3-Cr2O3,coatings at different loading and sliding conditions[J].Sādhanā,2017,42(10):1763-1772.
[9]成志芳,马壮,卢林,等.等离子喷涂Al2O3-13wt.%Ti O2涂层微观组织形貌分析[J].表面技术,2012,41(3):9-11.
[10]LI C,WANG Y,GUO L,et al.Laser remelting of plasma-sprayed conventional and nanostructured Al2O3-13wt.%Ti O2coatings on titanium alloy[J].Journal of alloys&compounds,2010,506(1):356-363.
[11]WANG Y,LI C,GUO L,et al.Laser remelting of plasma sprayed nanostructured Al2O3-Ti O2,coatings at different laser power[J].Surface&coatings technology,2010,204(21/22):3559-3566.
[12]赵小健,周青.热处理对等离子喷涂Al2O3/Ti O2涂层断裂韧性的影响[J].热加工工艺,2015,44(8):133-136,139.
[13]LIU L,XU H,XIAO J,et al.Effect of heat treatment on structure and property evolutions of atmospheric plasma sprayed Ni Cr BSi coatings[J].Surface&coatings technology,2017,325:548-554.
[14]刘正林.摩擦学原理[M].北京:高等教育出版社,2012:108-110.
[15]田宗军,王东生,沈理达,等.等离子喷涂纳米Al2O3-13TiO2陶瓷涂层研究[J].稀有金属材料与工程,2009,38(10):1740-1744.
[16]LI C G,YU Z S,ZHANG Y F,et al.Microstructure evolution of laser remelted Al2O3-13wt.%Ti O2,coatings[J].Journal of alloys and compounds,2013,576(21):187-194.
[17]赵亚永,张彦敏,宋克兴.Al2O3/Cu弥散强化铜合金应力松弛行为[J].河南科技大学学报(自然科学版),2017,38(1):6-9.
[18]袁鸿志,冯晓宇.去应力退火工艺参数的研究[J].热处理技术与装备,2014,35(2):48-50.
[19]王召煜,李国禄,王海斗,等.超音速等离子喷涂Fe Cr BSi涂层组织和残余应力分析[J].材料热处理学报,2012,33(1):146-149.
[20]孙渊,张栋,午丽娟,等.材料残余应力对硬度测试影响程度的分析[J].华东理工大学学报(自然科学版),2012,38(5):652-656.
[21]肖志超,陈青华,金志浩,等.热处理温度对碳纤维增强碳复合材料摩擦学性能的影响[J].硅酸盐学报,2008,36(8):1153-1158.
[22]安家财,杜三明,肖宏滨,等.等离子喷涂Zr O2/Al2O3陶瓷涂层的摩擦磨损性能[J].中国表面工程,2011,24(1):20-24,88.
[23]石晓轩.T10表面不同喷涂层微观组织及耐磨性研究[D].秦皇岛:燕山大学,2016.