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模具钢激光表面改性技术的研究进展 总被引:2,自引:0,他引:2
介绍了激光表面淬火、激光熔覆及激光表面合金化在模具钢表面改性技术方面的应用特点和研究现状,提出了实际应用中存在的问题及今后需深入研究的方向,为激光表面处理技术应用于模具钢的表面处理提供参考。 相似文献
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于家斗 《稀有金属材料与工程》1992,21(6):1-7
概述了利用高能束流进行材料表面改性的技术及其对钛合金表面改性的应用。这些技术包括激光固态相变强化处理,激光表面熔凝处理、激光表面合金化、离子注入、离子束混合和离子束辅助气相沉积。钛合金经高能束流表面改性处理可以提高其表面硬度、耐磨性和耐腐蚀性能。 相似文献
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锆合金表面改性研究进展 总被引:2,自引:0,他引:2
综述了目前锆合金表面改性方面研究的进展状况。主要对表面预膜、离子注入和激光表面处理等3种方法进行总结。其中表面预膜主要简介了高压釜预膜、表面镀膜和阳极氧化等3种方法的研究现状:离子注入方面介绍了Y,La,Nb等离子注入对锆合金的改性效果及其原理;激光表面处理方面介绍了激光表面熔覆和激光表面合金化2种方法在锆合金表面改性方面的研究进展。 相似文献
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轧辊是轧钢生产中的重要工具。为了解决轧辊的易磨损、易断裂、热裂纹和剥落问题,我公司采用了激光技术对轧辊表面进行改性处理,以达到在原轧辊韧性不变的状态下,大幅度提高其表面硬度,提高其耐磨损能力,以满足轧钢生产对轧辊的要求。经实验室试验、中试实验和工业生产实践证明,该研究获得了成功。1实验室试验1.1实验方案为观察经激光改性处理后的轧辊表面硬度及金相组织的变化,从70Mn2铸钢、低NiCrMo铸铁成品轧辊表面取3cmx5cmx12cm试料。将部份试样用激光技术进行改性处理,部分不做改性处理,二者进行… 相似文献
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激光表面处理技术的现状及发展 总被引:5,自引:4,他引:5
简述了激光表面改性的研究和发展现状,特别是激光表面淬火、激光熔敷、激光表面合金化和激光熔覆等4种技术,对各项技术的原理、特点和国内外研究现状分别加以描述。最后,还指出了激光表面改性技术存在的问题和发展前景。 相似文献
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The low wear resistance of titanium and its alloys limits their use in machine building. Methods for the surface hardening of titanium and its alloys, which tend to enhance their antifriction properties. are of significant interest in this respect. Laser alloying is one of the most promising methods of improving the strength of the surface. In this study. we investigated the characteristic features of the structural formation of the surface layers of titanium alloy VT3-1 during laser alloying from dross coatings containing a mixture of boron carbide B4C and chromium.Perm State Technical University. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 14–15, January, 1994. 相似文献
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Laser cladding is a new surface modification technology,and is widely used for fabricating wear and corrosion resistant composites coatings. Self-fluxing alloys have many advantages,such as excellent properties of deoxidizing and slagging,high wear resistance,low melting point and easy cladding,and are often used in laser cladding to improve wear and corrosion resistance of titanium and its alloys. In this paper,the recent development of Ni-based and Co-based self-fluxing alloy coatings which includes the influence of rare earth and ceramic particles in coatings are summarized. Besides,the effects of processing parameters,such as laser power and scanning speed,on coatings are reviewed. Finally,the trend of development in the future is forecasted. 相似文献
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钛及其合金由于质轻、耐腐蚀性能好、强度高、弹性模量低、生物相容性佳和骨整合性优异,已成为应用最广泛的航空航天与生物医学金属材料之一。然而,较低的塑性、低硬度、和耐磨损性能限制了其发展和应用。激光表面处理(LST)技术在不改变材料体积的情况下增强表面性能,成为钛合金表面改性的一种有利手段。综述了利用LST技术对钛及其合金材料进行表面改性的研究进展和应用现状。分析了激光相变硬化、激光表面重熔、激光冲击喷丸、激光表面合金化、激光熔覆和复合LST的机理、工艺参数、表面特性和微观结构。总结了LST在航空航天、医学等领域的应用,介绍了现有的局限性,提出了未来的研究方向,并对LST在钛及其合金材料上的发展趋势进行了展望,以推进LST创新,为钛合金在多领域中的应用开辟新途径。 相似文献
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B. Yan N. L. Loh Y. Fu C. Q. Sun P. Hing 《Journal of Materials Engineering and Performance》1999,8(6):653-660
Titanium alloys are characterized by poor tribological properties, and the traditional use of titanium alloys has been restricted
to nontribological applications. The deposition of a well adherent diamond coating is a promising way to solve this problem.
In this study, the tribological properties of diamond-coated titanium were studied using a pin-on-disk tribometer, and the
results were compared with those of pure titanium and plasma nitrided titanium. The tribological behavior of pure titanium
was characterized by high coefficient of friction and rapid wear of materials. Plasma nitriding improved the wear resistance
only under low normal load; however, this hardened layer was not efficient in improving the wear resistance and the friction
properties under high normal load. Diamond coating on pure titanium improved the wear resistance of titanium significantly.
Surface profilometry measurement indicated that little or no wear of the diamond coating occurred under the test conditions
loads. The roughness of the diamond coating was critical because it controlled the amount of abrasive damage on the counterface.
Reducing the surface roughness by polishing led to the reductions in both the friction and wear of the counterface. 相似文献