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Effects of Primary Carbide Size and Type on the sliding wear and Rolling Contact Fatigue Properties of M50 Bearing Steel

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金属学报:英文版 2023年第8期36卷 1336-1352页

作者： Liqi Yang Weihai Xue Siyang Gao Yanfei Cao Hongwei Liu Deli Duan Dianzhong Li Shu Li Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

The influences of primary carbide size and type on the sliding wear behavior and rolling contact fatigue (RCF) properties of M50 bearing steel were systematically investigated under oil lubrication condition. A major breakthrough was achieved in the influence of primary carbide on tribological behavior. The opposite effect brought by primary carbide size on the sliding wear resistance and RCF life of M50 bearing steel was determined. wear resistance increased with an increase in the studied primary carbide size, whereas RCF life decreased significantly. Compared with the 0 R and R positions with a relatively small carbide size, the wear volume of the 1/2 R position with a large carbide size was the smallest. Compared with the 0 R and R positions, the L10 life of the 1/2 R position decreased by 82.7% and 84.8%, respectively. On the basis of the statistical correlation between primary carbide size and the two tribological properties, a critical maximum carbide size of 5-10 μm was proposed to achieve optimal tribological performance. This research suggests that the equivalent diameter of the primary carbide should be controlled to be smaller than 10 μm, but further decreasing primary carbide size to less than 5 μm is unnecessary. The influence of primary carbide type in M50 bearing steel on sliding wear resistance was also discussed. Results indicate that the MC-type carbides with higher elastic modulus and microhardness exhibit better wear resistance than the M2C-type carbides.

关键词： Carbide size Carbide type sliding wear Rolling contact fatigue M50 bearing steel

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Debris effect on the surface wear and damage evolution of counterpart materials subjected to contact sliding

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Advances in Manufacturing 2022年第1期10卷 72-86页

作者： Wei Li Liang-Chi Zhang Chu-Han Wu Zhen-Xiang Cui Chao Niu Yan Wang School of Mechanical and Manufacturing Engineering The University of New South WalesSydneyNSW 2052Australia Shenzhen Key Laboratory of Cross-Scale Manufacturing Mechanics Southern University of Science and TechnologyShenzhen 518055GuangdongPeople’s Republic of China SUSTech Institute for Manufacturing Innovation Southern University of Science and TechnologyShenzhen 518055GuangdongPeople’s Republic of China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongPeople’s Republic of China Baoshan Iron&Steel Co. LtdShanghai 200941People’s Republic of China

This paper aims to explore the debris effect on surface wear and damage evolution of counterpart materials during contact sliding.A cylinder-on-flat testing configuration is used to investigate the wear behaviours of the contact pair.To explore the roles of wear debris,compressed air is applied to remove the debris in sliding zones.The comparative study demonstrates that the influence of debris removal is related to the surface properties of contact pairs.When substantial wear debris accumulates on the tool surface,debris removal can considerably alter surface damage evolution,resulting in different friction transitions,distinct surface morphology of contact pair,as well as different rates of material removal.It has been found that the surface damage evolution will not reach a stable stage unless the increase of wear particle number ceases or the average size of wear particles becomes lower than a specific threshold.However,the influence of debris removal reduces when the adhesion between the contact pair materials gets smaller.

关键词： sliding wear Debris effect Debris distribution Contact sliding Metal forming

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Effect of solidification cooling rate on microstructure and tribology characteristics of Zn-4Si alloy

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 362-373页

作者： F.Akbari M.Golkaram S.Beyrami G.Shirazi K.Mantashloo R.Taghiabadi M.Saghafi Yazdi I.Ansarian Department of Metallurgy and Material Science Imam Khomeini International University(IKIU)Qazvin ***Iran

The main objective of this work was to modify the microstructure and enhance the tribological properties of a new Zn-4Si al-loy through a high solidification cooling rate(SCR).According to the results,by increasing the SCR from 2.0 to 59.5℃/s the average size of primary Si particles and that of the grains reduced from 76.1 and 3780μm to less than about 14.6 and 460μm,respectively.Augment-ing the SCR also enhanced the microstructural homogeneity,decreased the porosity content(by 50%),and increased the matrix hardness(by 36%).These microstructural changes enhanced the tribological behavior.For instance,under the applied pressure of 0.5 MPa,an in-crease in the SCR from 2.0 to 59.5℃/s decreased the wear rate and the average friction coefficient of the alloy by 57%and 23%,respect-ively.The wear mechanism was also changed from the severe delamination,adhesion,and abrasion in the slowly-cooled alloy to the mild tribolayer delamination/abrasion in the high-cooling-rate-solidified sample.

关键词： zinc-silicon alloy primary silicon solidification cooling rate tribology sliding wear

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sliding wear Mechanism of Metallic Rubbing Pairs and Effect of Solid Lubrication

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Progress in Natural Science:Materials International 1993年第3期3卷 201-210页

作者：刘家浚朱宝亮张贤华赵永武 Academia Sinica Beijin 100084 Institute of Chemical Physics Lanzhou 73000 PRC Solid Lubrication Lab Tribology Research Institute Tsinghua University

IntroductionNumerous rubbing pairs of mechanical equipment,such as the bearings,gears,camsand tappets,cylinder liners and piston-rings,slideways,oil pumps,sliding seals,often fail dueto the sliding wear.Especially as the working conditions of equipment are increasingly se-vere with the progress of science and technology,this problem becomes more and moreconspicuous:therefore researches into sliding wear mechanism and measures for reducing fric-tion and wear of materials possess an important theoretical and economicalsignificance.

关键词： sliding wear solid lubrication friction and wear

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Evolution Behaviors of Oxides in Severely Plastic Deformed Region of AISI 52100 Steel during Dry sliding wear

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Journal of Materials Science & Technology 2017年第4期33卷 330-337页

作者： Yuanxia Lao Hao Du Tianying Xiong Yuan Wang Key Laboratory of Radiation Physics and Technology Ministry of EducationInstitute of Nuclear Science and TechnologySichuan University Division of Surface Engineering of Materials Institute of Metal ResearchChinese Academy of Sciences

Under dry sliding wear, the evolution of oxides in severely plastic deformed（SPD） regions of metals has a great impact on the wear behaviors. To study the evolution behaviors of oxides in the SPD region, an SPD region was prefabricated on the surface of AISI 52100 steel by supersonic fine particle bombarding（SFPB） treatment. Dry sliding wear tests were carried out on both of the SFPB-treated and original samples.wear volume loss of the SPBF-treated samples were compared with those of the original samples at different loads. Microstructure, element composition and oxides distribution in the SPD region were characterized by scanning electron microscopy（SEM）, transmission electron microscopy（TEM） and an electron probe microanalysis（EPMA）. The results show that the evolution behaviors of the oxides in the SPD region change significantly with the load. Under low loads, oxides are usually formed on the contact surface. It inhibits adhesive wear on the steel. However, under high loads, oxides are apt to distribute along the cracks in the subsurface layer. The internal oxidation along the cracks can accelerate the cracks propagation, resulting in severe delamination wear on the steel.

关键词： sliding wear Plastic deformation Oxides Defects Steel

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Microstructure and sliding wear behavior of pseudo-alloy PS45/CuAl8 composite coating sprayed by HVAA technique

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Rare Metals 2012年第2期31卷 204-208页

作者： WU Yaosha a , ZENG Dechang a , LIU Zhongwu a , QIU Wanqi a , YU Hongya a , ZHONG Xichun a , LI Shangzhou a , and MA Yuexin b a School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China b Optoelectronic Engineering Department, Zhongshan Torch Polytechnic, Zhongshan 528436, China School of Materials Science & Engineering South China University of Technology Guangzhou China Optoelectronic Engineering Department Zhongshan Torch Polytechnic Zhongshan China

A pseudo-alloy PS45/CuAl8 composite coating was sprayed on steel substrate by high-velocity activated arc spraying (HVAA) process. Its sliding wear behavior at room temperature was evaluated by M-2000 wear tester. For comparison, a single CuAl8 coating was also prepared and tested under the same conditions. It is found that the pseudo-alloy composite coating consists of α-Cu and γ-Ni metallic matrix phases together with homogenously distributed minor Al 2 O 3 , Cr 2 O 3 oxide phases. Moreover, pseudo-alloy coating possesses much better sliding wear resistance than CuAl8 coating due to the enhanced hardness and microstructural homogenization. Fatigue wear and abrasive wear are responsible for the wear-down mechanism of the pseudo-alloy coating.

关键词： surface science HVAA pseudo-alloy composite coating PS45/CuAl8 sliding wear microstructure

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HEAT TREATING OF SINTERED Fe-1.5Mo-0.7C STEELS AND THEIR sliding wear BEHAVIOR

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Acta Metallurgica Sinica(English Letters) 2003年第1期16卷 51-59页

作者： J.A.Wang Y.He et al State Key Laboratory of Mechanical Transmission Chongqing University Chongqing400044China School of Materials Science and Engineering Shanghai UniversityShanghai200072China

The influence of heat treating on mechanical properties as well as on the sliding wear behavior of sintered Fe-1.5Mo-0.7C steels was experimentally studied. The microstruc-tures of sintered steels change from upper bainite to martensite, tempered martensite, pearlite and lower bainite depending on the heat treating conditions. Heat treating increases the hardness of sintered steels but high tempering temperature, i.e. 700℃, causes the hardness to be even lower than that of the as-sintered ones. The impact energy of sintered steels increases with increasing tempering temperature and arrives the highest at 700℃, while the steels tempered at 200℃ have the highest transverse rupture strength. Austempering results in fair good overall properties, such as hardness, impact energy, and transverse rupture strength. When the sintered steels were austempered, oil-quenched or tempered below 400? after quenched, the wear coefficient becomes considerably lower. Fair high hardness, such as HV30 > 380, and structures of martensite, tempered martensite or lower bainite are beneficial to lowering the wear coefficient. Under the wear test conditions given, delamination and oxidational wear are the main wear regimes for sintered Fe-1.5Mo-0.7C steels. Fe3O4 in the wear debris is beneficial to lowering wear coefficient.

关键词： heat treating sintered Fe-1.5Mo-0.7C steel sliding wear

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Influence Factors of Fractal Characterization of Reciprocating sliding wear Surfaces

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Tsinghua Science and Technology 2004年第3期9卷 312-316页

作者：周新聪冯伟严新平萧汉梁 Reliability Engineering Institute Wuhan University of Technology Wuhan 430063 ChinaReliability Engineering Institute Wuhan University of Technology Wuhan 430063 ChinaReliability Engineering Institute Wuhan University of Technology Wuhan 430063 ChinaReliability Engineering Institute Wuhan University of Technology Wuhan 430063 China

The principal purpose of this paper is to investigate influence factors of fractal characterization of reciprocating sliding wear surfaces. The wear testing was completed to simulate the real running condition of the diesel engine 8NVD48A-2U. The test results of wear surface morphology dimension characterization show that wear surface profiles have statistical self-affine fractal characteristics. In general, there are no effects of the profilometer sampling spacing and sampling length and evaluation length on the fractal dimen-sions of the surfaces. However, if the evaluation length is too short, the structure function logarithm of the surface profile is scattered. The sampling length acting as a filter is an important part of the fractal dimen-sion measurement. If the sampling length is too short, the evaluation of the fractal dimension will have a larger standard deviation. The continuous wavelet transform can be used to improve surface profile dimension characterization.

关键词： fractal dimension wear surface sliding wear wavelet transform

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Dry sliding wear Behavior of Silver Containing Ni-Based Composite-Steel Tribo-Pair

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Journal of Shanghai Jiaotong university(Science) 2012年第4期17卷 470-474页

作者： RAJNESH Tyagi 熊党生李建亮戴基卉 Department of Materials Science and Engineering Nanjing University of Science and Technology Department of Mechanical Engineering Institute of TechnologyBanaras Hindu University

Ni-based self lubricating composites containing four different amounts of silver were prepared by powder metallurgy(PM) route.The room temperature friction and wear behavior was investigated by carrying out dry sliding experiments against bearing steel using a ring-on-disk configuration.Tests were conducted at a constant load of 100 N and different sliding speeds of 0.5,1.0 and 1.5 m/s to analyze the effect of both the speed and the silver content on the wear behavior of the tribo-pair.The friction coefficient and the wear rate of the composites were found to decrease with increasing both the sliding speed and the silver content.The wear rate of the counterface was observed to be a little higher when it was siding against the composite having silver in comparison to that without any silver.However,the overall wear rate of the tribo-pair was found to decrease with increasing sliding speed and silver content.

关键词： Ni-based composites solid lubricants silver lubrication sliding wear self lubrication non-ferrous materials

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wear Behavior and Mechanism of a sliding Pair of 0.1C-3Cr-2W-V Nitrided Steel Rubbing against an Aluminum Bronze Alloy

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Journal of Iron and Steel Research(International) 2016年第3期23卷 281-288页

作者： Guang-hong WANG Sheng-guan QU Zhi-hua XIONG Fu-qiang LAI Xiao-qiang LI Mao-sheng YANG School of Mechanical and Automotive Engineering South China University of Technology Institute of Special Steel Central Iron and Steel Research Institute

wear behavior and mechanism of plasma nitrided steel oscillating against a heat-treated and an untreated aluminum bronze alloy were investigated using an Optimol SRV tribometer.The influence of heat treatment on the mechanical properties of the alloy was evaluated.Furthermore,the wear debris was also examined to understand the wear mechanisms.The results show that a 220-230μm nitrided layer,which was harder than the substrate,was obtained on the steel surface.The tensile strength and hardness of the alloy are found to be significantly improved by the heat treatment associated with low impact toughness.The heat treatment of the alloy did not obviously decrease the friction coefficient of the nitrided steel-bronze couple.However,the wear loss of the nitrided steel increased when it mated with the treated bronze by a severe three-body abrasion.The nitrided steel was mainly damaged by fatigue spalling.Under plane contact conditions,the wear debris was mainly generated from the bronze part and can escape from the interface before being oxidized,leading to the phase structure of all the debris being copper rather than copper oxides.

关键词： steel plasma nitriding aluminum bronze sliding wear three-body abrasion

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