激光与光电子学进展, 2015, 52 (1): 011408, 网络出版: 2014-12-29   

表面激光相变硬化45 钢的冲击韧性及其断裂机理

Impact Toughness and Fracture Mechanism of the Surface Laser Hardened Components of 45 Steel
作者单位
安徽建筑大学机械与电气工程学院, 安徽合肥230022
摘要
用激光相变硬化技术制备45 钢冲击试样(V 型槽口),并对试样进行冲击试验,研究了激光功率对45 钢激光表面硬化冲击试样冲击韧性值的影响。通过光学显微镜和扫描电镜(SEM)观察了试样表面显微组织和断口的形貌特征。对常规热处理试样和激光表面硬化试样断口进行对比分析。结果表明,常规热处理试样断裂后断裂表面均表现出韧性断裂后的韧窝特征,激光硬化层起裂区呈现脆性断裂特征。经激光硬化后钢件的断裂机制发生改变,导致激光硬化试样冲击韧性值的下降。45 钢激光表面硬化冲击试样冲击韧性值随着激光功率增加而逐渐减少。
Abstract
In this study, the impact of laser quenching on 45 steel (V-shaped notch) is researched and the effect of laser power on the fracture toughness is investigated. The specimens surface and fracture morphology are examined by optical microscope and scanning electronic microscope (SEM). Dimple characteristics are observed on the fracture surface of original specimens. As comparison, there are brittle fracture characteristics in the crack initiation zone of laser hardened specimens. Our results indicate that the fracture toughness of laser hardened specimen is reduced. Moreover, the surface fracture toughness decreases with increasing of the laser power.
参考文献

[1] 程义远, 王勇, 韩彬, 等. 35CrMoAL 钢激光淬火-渗氮复合处理微观组织与性能[J]. 中国激光, 2010, 37(1):250-255.

    Cheng Yiyuan, Wang Yong, Han Bin. et al.. Microstructure and properties of 35CrMoAL steel in laser quenchingnitridng[J]. Chinese J Lasers, 2010, 37(1): 250-255.

[2] 任旭东, 张田, 张永康, 等. 激光冲击处理提高00Cr12 合金的疲劳性能[J]. 中国激光, 2010, 37(8): 2111-2114.

    Ren Xudong, Zhang Tian, Zhang Yongkang, et al.. Improving fatigue properties of 00Cr12 alloy by laser shock processing [J]. Chinese J Lasers, 2010, 37(8): 2111-2114.

[3] R Komanduri, Z B Hou. Thermal analysis of the laser surface transformation hardening process [J]. International Journal of Heat and Mass Transfer, 2001, 44(15) : 2845-2862.

[4] 邱星武, 李刚, 陈华, 等. 激光相变硬化技术发展现状及展望[J]. 热处理技术与装备, 2009, 30(1): 4-6.

    Qiu Xingwu, Li Gang, Chen Hua. Development status and prospects of laser phase transformation hardening [J]. Heat Treatment Technology and Equipment, 2009, 30(1): 4-6.

[5] 雷声, 刘全坤, 缪宪文, 等. 激光硬化层对GCr15 钢弯曲性能的影响[J]. 材料热处理学报, 2010, 31(5): 132-135.

    Lei Sheng, Liu Quankun, Miao Xianwen, et al.. Influence of the laser transformation hardened layers on the flexural properties of GCr15 steel components [J]. Transactions of Materials and Heat Treatment, 2010, 31(5): 132-135.

[6] T Miokovic′, V Schulze, O V hringer, et al.. Influence of cyclic temperature changes on the microstructure of AISI 4140 after laser surface hardening [J]. Acta Materialia, 2007, 55(2): 589-599.

[7] Q B Liu. Experimental study of the laser quenching of 40CrNiMoA steel [J]. Journal of Materials Processing Technology, 1999, 88(1-3): 77-82.

[8] Henrikki Pantsar.Relationship between processing parameters of alloy atom diffusion distance and surface hardness in laser hardening of tool steel [J]. Journal of Materials Processing Technology, 2007, 189: 435-440.

[9] Komanduri R, Hou Z B. Thermal analysis of the laser surface transformation hardening process [J]. International Journal of Heat and Mass Transfer, 2001, 44(15): 2845-2862.

[10] T Reti, G Bagyinszki, I Felde, et al.. Prediction of as- quenched hardness after rapid austenitization and cooling of surface hardened steels [J]. Computational Materials Science,1999, 15(1): 101-112.

[11] 孔凡涛, 陈玉勇, 吴俊, 等. 双相区热处理对A508-3 钢的冲击性能及断口形貌的影响[J]. 金属热处理, 2011, 36(11): 54-58.

    Kong Fantao, Chen Yuyong, Wu Jun, et al.. Effect of double-phase area heat treatment on impact property and impact section of A508-3 steel [J]. Heat Treatment of Metals, 2011, 36(11): 54-58.

[12] 余金水, 邱长军, 周炬, 等. 激光快速成形304 不锈钢试件组织与拉伸断口特性分析[J]. 激光与光电子学进展, 2012, 49(1):011402.

    Yu Jinshui, Qiu Changjun, Zhou Ju, et al.. Analysis on microstructure and tensile fracture characteristic of 304 stainless steel specimens made by laser rapid forming [J]. Laser & Optoelecs Progress, 2012, 49(1): 011402.

雷声, 任静明, 石超, 朱绍锋, 刘牛, 陈香. 表面激光相变硬化45 钢的冲击韧性及其断裂机理[J]. 激光与光电子学进展, 2015, 52(1): 011408. Lei Sheng, Ren Jingming, Shi Chao, Zhu Shaofeng, Liu Niu, Cheng Xiang. Impact Toughness and Fracture Mechanism of the Surface Laser Hardened Components of 45 Steel[J]. Laser & Optoelectronics Progress, 2015, 52(1): 011408.

本文已被 1 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!