检索结果-南通市图书馆

中国激光 1991年第6期18卷 466-470页

作者：张思玉郑克全兰州大学物理系兰州730001

本文叙述了用一台高功率二氧化碳激光器在60号钢表面所作的碳钨合金包覆实验。实验结果表明在低质钢材表面包覆一层碳钨合金层大大地提高了工件表面的耐磨性能;包层厚度与激光扫描速度的平方成反比。

关键词：钢表面强化激光包覆激光处理

激光包覆的功能梯度Ti—Al／TiB2复合材料

在线全文

学校读者我要写书评

暂无评论

钒钛 1995年第1期 53-56页

作者：黄金昌

作为生产以工业纯钛为基体的功能梯度材料的一种手段，研究了Ｔｉ－Ａｌ／ＴｉＢ２复合材料的激光表面包覆，其中包括单层和双层。基本工艺参九是：激光功率为１．７ｋＷ，光束直径为３ｍｍ通过速度为３－２２ｍｍ／ｓ，粉末流动速度为... 详细信息

作为生产以工业纯钛为基体的功能梯度材料的一种手段，研究了Ｔｉ－Ａｌ／ＴｉＢ２复合材料的激光表面包覆，其中包括单层和双层。基本工艺参九是：激光功率为１．７ｋＷ，光束直径为３ｍｍ通过速度为３－２２ｍｍ／ｓ，粉末流动速度为２．２－６．２ｇ／ｍｉｎ。在厚度为２ｍｍ的功能梯度Ｔｉ－Ａｌ／ＴｉＢ２系统中，铝含量逐渐地从０％增加到３５ｗｔ％（５０ａｔ％）。

关键词：功能梯度材料钛铝涂覆二硼四钛激光包覆

Microstructure Evolution and Cracking Control of 316L Stainless Steel Manufactured by Multi-layer Laser Cladding

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5B期25卷 1013-1016页

作者： SONGJian-li DENGQi-lin HUDe-jin SUNKang-kai ZHOUGuang-cai SchoolofMechanicalandPowerEngineering ShanghaiJiaotongUniversityShanghaiChina SchoolofMechanicalandPowerEngineering ShanghaiJiaotongUniversityShanghaiChina／／SchoolofMaterialScienceandEngineeringTaiyuanHeavyMachineryInstituteTaiyuanChina

Multi-layer laser cladding manufacturing is a newly developed rapid manufacturing technology. It is a powerful tool for direct fabrication of three-dimensional fully dense metal components and part repairing. In this paper, the microstructure evolution and properties of 316L stainless steel deposited with this technology was investigated, compact components with properties similar to the as-cast and wrought annealed material was obtained. Cracking was eliminated by introducing of supersonic vibration and application of parameter adjustment technologies.

关键词：激光包覆显微结构 316L不锈钢裂纹控制

Microstructure and Tribological Properties of In-situ Synthesized TiB_2- TiC /Ni Based Composite Coating by Laser Cladding

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5B期25卷 1000-1003页

作者： SUNRong-lu TANGYing YANGXian-jin LaserTechnologyInstituteofTianjinPolytechnicUniversity TianjinChina MaterialsScienceandEngineeringSchoolofTianjinUniversity TianjinChina LaserTechnologyInstituteofTianjinPolytechnicUniversity TianjinChina／／MaterialsScienceandEngineeringSchoolofTianjinUniversityTianjinChina

A TiB2 and TiC particles reinforced Ni based composites coating was prepared on TC4 alloy surface by chemical reaction among Ti, B and C elements using laser cladding technique. Microstructural analysis showed that the sizes of in-situ synthesized TiB2 and TiC particles ranged within 5~10um and l^2um, respectively, while both the two kinds of particles were uniformly distributed in the clad layer. The measurement of microhardness and wear and friction properties indicated that the microhardness of laser clad layer was HV900-1100, being three times of that of the TC4 alloy; the friction coefficient of the laser clad layer in air and in vacuum (10~5 Pa) ranged within 0.2-0.3 and 0.3-0.5, respectively; the wear rate in terms of mass loss was considerably lower than that of the TC4 alloy both in air and in vacuum environment.

关键词：激光包覆显微结构复合涂层磨损性能 TiB2-TiC/Ni

Laser Cladding of an Al-11.7Wt%Si Alloy on ZM5 Magnesium Alloy to Enhance the Corrosion Resistance

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5B期25卷 992-995页

作者： CHENChang-jun WANGMao-cai WANGDong-sheng StateKeyLabatoryforCorrosionandProtection InstituteofMetalResearchChineseAcademyofSciencesShenyangP.R.China110016

Magnesium alloy is an important engineering materials, but the wider application is restricted by poor corrosion resistance. An attempt was made to enhance the corrosion resistance and microhardness of a Mg-Al base ZM5 alloy by laser cladding of Al-11.7Wt%Si alloy powder with thickness *** and 1.7mm. The microstructure, phase and corrosion properties were analyzed by scanning electron micrographic (SEM), electron probe microanalysis(EPMA), vicker hardness tester and corrosion measurement system, respectively. Microhardness of the cladding layer was enhanced to 150-375Hv as compared to 60-99Hv of the substrate. The corrosion potential (Ecorr) of the cladding sample was 80mv higher than the substrate, while the corrosion current (Icorr) was lower than the substrate.

关键词：镁合金激光包覆显微结构 ZM5 耐蚀性

Metallographic Analyses of Laser Gladded WC-Ni and WC-Co Hard-facing Metals

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5B期25卷 996-999页

作者： HK Chikwanda M Chiremba C Van Rooyen Department of Chemical &Metallurgical Engineering Tshwane University of Technology Pretoria South Africa.Department of Chemical &Metallurgical Engineering Tshwane University of Technology Pretoria South Africa.National Laser Centre CSIR Pretoria South Africa

Laser cladding is performed to improve the surface properties of metallic machine components. Extensive work is being conducted to investigate the relationships among the cladding parameters, clad powder characteristics and the quality of the clad layer. This work presents some of the metallographic analyses results of WC -Ni and WC-Co clad layers. The clad layers are characterised with non-uniform carbide particles, mostly WC imbedded in a more ductile matrix. The transition from the clad layer to the substrate metal had a distinct dilution zone. The ratio of this zone to the clad height was in the range of 10 -12% and this still needs to be refined.

关键词：激光包覆衬底合金包覆高度包覆深度 WC-Ni WC-Co

Effects of Heat Treatment on Microstructure and Hardness of Laser Clad NiWCRE Alloy Layer

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5B期25卷 1017-1020页

作者： LIUSu-qin HUANGJin-liang WANGShun-xing DONGQi-ming He＇nanUniversityofScience＆-Technology LuoyangHe＇nan-China

The effects of heat treatment on tnicrostructure and hardness of laser surface-clad Ni2 !+20%WC+0.5%CeO2 on the heat-resistant cast iron were investigated by means of X-ray diffraction(XRD), transmission electron microscope(TEM) and microhardness test. The experimental results showed that heat-treating at 500’C has no effect on microstructure and hardness of the layers. Although the phase composition of the layers heat-treated at 700°C and 800°C remain unchanged, more Ni3B and N14B3 phases are precipitated on the matrix of the cladding layer, the metastable phase—M7C3 is transformed into steady phase—M23C6, and the precipitated phases coarsened.

关键词：热处理激光包覆硬度显微结构 NiWCRE合金

Study on Cracking Tendency and Mechanism of Gray Cast Iron Laser Cladding

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5B期25卷 1021-1024页

作者： YEHong YANZhong-lin HUANGQi YANGHui SchoolofMaterialsScienceandEngineering ChongqingInstituteofTechnologyChongqingChina EngineeringTrainingCenter ChongqingInstituteofTechnologyChongqingChina

In this paper, NiCrSiB and CoWC35 powder has been used in laser cladding of gray cast iron. The cracking tendency has also been discussed. The cracks have been observed with a scan electron microscopy to analyze the cracking mechanism. The results show that cracks have not appeared in NiCrSiB cladding. Nevertheless, the cracking tendency of CoWC35 cladding is extremely high and there are both cold cracks and hot cracks in the cladding. The cracking tendency of laser cladding depends on physical properties of the cladding material and plasticity and roughness of the cladding.

关键词：激光包覆裂纹铸铁 NiCrSiB CoWC35

在线全文

学校读者我要写书评

暂无评论

激光金属表面改性技术

世界产品与技术 1996年第5期 10-11页

作者：荣烈润

本文介绍了当今世界各国利用激光技术进行金属表面改性处理的成就。

关键词：激光技术金属表面改性表面合金化激光包覆

Microstructure of laser clad Ti+Al+SiO_2+C powders on Ti6Al4V alloy

在线全文

学校读者我要写书评

暂无评论

材料与冶金学报 2006年第4期5卷 300-303页

作者：母久方胡芳友回丽东北大学海军航空工程学院青岛分院沈阳航空工业学院

Laser cladding experiment of Ti+Al+SiO2+C was carried out on Ti6Al4V alloy substrate, then the microstructure of the clad layer was analyzed with SEM and its Anti-oxidation function was discussed. Analyses microstructure show that the clad coating can be divided into three zones along the depth direction: clad, binding and heat-affected zones. Ti5Si3 in the clad zone exists in the form of fine dendrites, TiAl matrix filling among Ti5Si3 dendrites plays a role of connecting the Ti5Si3 with the TiAl3 and transferring load, so the clad coating has been strengthened obviously.

关键词： Ti5Si3 钛合金激光包覆微观结构