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Laser surface hardening of 42CrMo cast steel for obtaining a wide and uniform hardened layer by shaped beams
Sun PP(孙培培); Li SX(李少霞); Yu G(虞钢); He XL(何秀丽); Zheng CY(郑彩云); Ning WJ(宁伟健); Sun, PP (reprint author), Basic Technol Res Ctr, AVIC Engine Estab, Beijing 100028, Peoples R China.
Source PublicationINTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
2014-02
Volume70Issue:5-8Pages:787-796
ISSN0268-3768
AbstractFor laser surface hardening (LSH) of large-sized workpieces, a wide and uniform hardened layer of a single track is pursued. In this study, two kinds of shaped laser beams were used in LSH of 42CrMo cast steel to obtain the required hardened layer. One is a stripy spot with uniform-intensity array spots and the other a stripy spot with intensity blowup in the edge of the whole array spots. As a comparison, a Gaussian laser beam was also adopted. A three-dimensional finite element model was used to simulate the thermal history of specific points by the latter shaped beam and the Gaussian laser beam. The surface morphology, microstructure, microhardness, and uniformity of hardened layers were studied. The results showed that a wider and more uniform hardened layer could be obtained using the latter shaped beam at relative higher scanning velocities and laser power. The thermal history of a material has an important effect on the microstructure and microhardness finally formed. Due to the high peak temperature and heating rate caused by the latter shaped beam, a higher value of microhardness in the transformation hardened zone was found.
KeywordLaser Surface Hardening (Lsh) 42crmo Cast Steel Laser Beam Shaping Strip Array Spots
Subject AreaAutomation & Control Systems ; Engineering
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000330841500003
Funding OrganizationThis work was supported by the National Natural Science Foundation of China under grant no. 10832011.
DepartmentMAM激光智能制造工艺力学
Classification二类/Q2
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/48798
Collection先进制造工艺力学重点实验室
Corresponding AuthorSun, PP (reprint author), Basic Technol Res Ctr, AVIC Engine Estab, Beijing 100028, Peoples R China.
Recommended Citation
GB/T 7714
Sun PP,Li SX,Yu G,et al. Laser surface hardening of 42CrMo cast steel for obtaining a wide and uniform hardened layer by shaped beams[J]. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,2014,70(5-8):787-796.
APA Sun PP.,Li SX.,Yu G.,He XL.,Zheng CY.,...&Sun, PP .(2014).Laser surface hardening of 42CrMo cast steel for obtaining a wide and uniform hardened layer by shaped beams.INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,70(5-8),787-796.
MLA Sun PP,et al."Laser surface hardening of 42CrMo cast steel for obtaining a wide and uniform hardened layer by shaped beams".INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 70.5-8(2014):787-796.
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