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the high temperature creep resistance of the alloy with the addition of Zn. Key words: Mg-Y-Sm-Zr alloy; zinc; microstructure; mechanical properties; creep behavior 1 Introduction Magnesium alloys... properties of the alloys [2,3]. A number of binary and ternary Mg-RE alloys have been developed in recent decade [4-6]. For instance, Mg-Y-Sm-Zr alloy has considerable precipitation hardening......
for the Mg-4Y-4Sm-0.5Zr alloy. Key words: Mg-Y-Sm-Zr alloy; extrusion; heat treatment; ageing; mechanical properties  ... is extruded at higher temperature, more Y and Sm elements are present in solid solution in the extruded alloy. Therefore, it is reasonable to assume that the precipitation hardening effect......
(x=0, 2, 4, 6)合金的组织和力学性能.结果表明:铸态Mg-5Y-3Sm-0.5Zr合金主要由α-Mg和大部分位于晶界的Mg24Y5和Mg41Sm5第二相组成.添加Ho后,在晶界处出现了Mg24Ho5新相,Ho的含量高低对合金相组成没有影响.随着Ho含量的不断提高,析出的第二相逐渐增多,晶粒尺寸逐渐减小.当Ho含量为4%时,该铸态合金的综合力学性能最好,抗拉强度,屈服强度,硬度和伸长率分别为193 MPa,170 MPa,72.8 HBW和4.15%.关键词:Mg-Y-Sm-Zr合金;Ho;显微组织;力学性能;......
洛氏硬度测量不确定度的评定王帅,范语萱,侯琳中航飞机股份有限公司摘 要:本文在规定环境条件下,选用HRA,HRB和HRC标尺对硬度块(包括82.0HRA,65.9HRA,100.9HRB,87.3HRB,53.7HRB,59.8HRC,45.6HRC,28.1HRC,以下简称HRA高,HRA中,HRB低,HRB中,HRB高,HRC高,HRC中,HRC低)进行硬度试验,测得HRA,HRB和HRC值,进行不确定度的评定.关键词:金属材料;不确定度;硬度试验;......
The Strengthening of Cu-15Ni-8Sn Alloy WANG Ming-Pu1,WANG Yan-hui1,HONG Bin1 (1.School of Material Science and Engineering, Central South University, Changsha China) 摘要:The microstructure, property and relation between them of Cu-15Ni-8Sn alloy are studied by means of TEM and the measurement of hardness. The results show that γ '' metastable phase strengthens alloy because of its ordering......
The Technological Improvements of Aluminum Alloy Coloring by Electrolysis LI Nai-jun1 (1.Teachers College, Shenyang University, Shenyang 110015, P. R. China) 摘要:The technological process of coloring golden-tawny on aluminum alloy by electrolysis was improved in this paper. The optimum composition of electrolyte was found, the conditions of deposition and anodic oxidation by electrolysis were......
Microstructure and Performances of Nanocrystalline Zinc-nickel Alloy Coatings LI Guang-yu1,NIU Li-yuan1,JIANG Zhong-hao1,LIAN Jian-she1 (1.The Key Lab of Automobile Materials, Ministry of Education, China, College of Materials Science and Engineering, Jilin University, Nanling Campus, Changchun, 130025, China) 摘要:Nanocrystalline zinc-nickel alloy coatings were deposited from an alkaline......
适合溪洛渡地层条件的金刚石钻头的研制 袁学武1,楼日新2 (1.成都理工大学,四川,成都,610059;2.四川准达岩土工程公司,四川,成都,610072) 摘要: 1 概述孕镶金刚石钻头的研制在中国已走过近40年的历程.世界上普遍采用的热压,冷压,电阻式,中频式等工艺技术和设备也已突破.在经过前30年的实践和总结并达到相当高水平的基础上,人们已把研究转移到更高的层次. 关键词:溪洛渡; 孕镶金刚石钻头; 胎体硬度; Cu基合金; 烧结温度; [全文内容正在添加中] ......
黔北洛龙铝土矿地质特征及成因浅析宋卫华,杨光龙贵州省地质矿产勘查开发局一0六地质大队摘 要:黔北洛龙地区铝土矿呈似层状,透镜状产于上石炭统大竹园组,其形态受古基底地形起伏的控制.矿石品质以高铝,低硫,中铁,中高铝硅比为特征.成因类型属含硬水铝石的沉积型铝土矿矿床.关键词:铝土矿;地质特征;成因;洛龙矿区;黔北;......
喀麦隆洛比铁矿床地质特征及储量估算探讨林斌1,温小亚2,赵福平21. 中钢矿业开发有限公司2. 中钢集团工程设计研究院有限公司石家庄设计院摘 要:通过分析喀麦隆洛比铁矿区成矿地质背景及矿区地质,研究该矿床地质特征,建立了矿床三维地质模型,估算了矿区资源储量.其结果与传统方法估算的误差小于1%,矿区储量估算准确性较高,可以作为矿山开采,设计的依据.关键词:喀麦隆;矿床地质特征;三维矿体模型;储量估算;......