深冷处理对钴铬钼高熔铸造合金拉伸力学性能的影响

华西口腔医学杂志

深冷处理对钴铬钼高熔铸造合金拉伸力学性能的影响

陈孟诗1,朱智敏2,李　宁3

1.四川大学建筑与环境学院　力学系,四川　成都610065; 2.四川大学华西口腔医院　修复科,四川　成都610041;3.四川大学制造与工程学院,四川　成都610065

收稿日期:2004-06-25 修回日期:2004-06-25 出版日期:2004-06-20 发布日期:2004-06-20
通讯作者: 朱智敏,Tel:028-85502141
作者简介:陈孟诗(1947-),男,湖北人,副教授,学士
基金资助:
四川省科学基金资助项目(02sy029-130)

The Effect of Cryotreat on Tensile Properties of Medium Melting-point and High Melting-point Castable Alloy

CHEN Meng-shi1, ZHUZhi-min2, LI Ning3

1.Dept. ofEngineering Mechanics,Sichuan University, Chengdu610065, China;2. Dept. ofProsthodontics, West China College ofStomatology,Sichuan University, Chengdu610041, China;3.School ofManu- facturing Science and Engineering, Sichuan University, Chengdu610065, China

Received:2004-06-25 Revised:2004-06-25 Online:2004-06-20 Published:2004-06-20

摘要/Abstract

摘要：

目的　研究CW-H型钴铬钼高熔铸造合金在低温处理及回火后拉伸力学性能的改变及合金内部结构的变化。方法　15个试件分为对照组、深冷处理组、深冷处理加回火组。每组取1个作扫描电镜(SEM)分析,其余加工成拉伸试件用应变片测试技术测定其弹性模量,在电子万能试验机上拉断,测试其抗拉强度,最后用游标卡尺测量其延伸率。结果　CW-H型钴铬钼高熔铸造合金经深冷处理后,弹性模量显著提高(P<0·01),强度极限亦有显著提高(P<0·05),延伸率下降(P<0·05),基体中弥散析出的二次碳化物、HCP相(层错结构)的出现使基体得以强化;再经回火处理,与深冷处理后的指标无显著性差异(P>0·05)。结论　深冷处理能显著提高钴铬钼高熔铸造合金的抗拉强度,深冷加回火处理使高熔铸造合金的塑性较未回火处理的合金有一定改善,SEM分析支持拉伸实验结果。

关键词: 深冷处理, 钴铬钼高熔铸造合金, 拉伸力学性能

Abstract:

Objective　To introduce cryotreat technique into prosthetic dentistry by testing the tensile properties of CW-H Co- Cr-Mo cast alloy before and after cryotreat and to observe the image changes by SEMto study the mechanismthat changes the ten- sile properties of the alloy.Methods　15 CW-H cast alloy were divided into 3 groups, i.e. control group (G1), cryotreated group (G2) and cryotreated plus post-cryogenic treated group (G3). The gauge test technique was employed to test the modulus of elasticity. Then the strength and percentage elongation (PE) were tested. SEM images were used to analyze the mechanism that improved the tension properties of the alloy.Results　For CW-H alloy the strength and the modulus of elasticity of both G2 and G3 were effectively increased but PE effectively decreased than G1. There was no effectively difference between G2 and G3, but G3 was largerthan G2. SEMimages of G2 and G3 showed that secondary-carbonide separated out all overthe alloy.Conclusion　 The results obtained above suggest that cryotreat is an effective method in enhancing tensile properties of CW-HCo-Cr-Mo cast al- loy.

Key words: cryotreat, CW-H Co-Cr-Mo cast alloy, tensile property

陈孟诗1,朱智敏2,李　宁3. 深冷处理对钴铬钼高熔铸造合金拉伸力学性能的影响[J]. 华西口腔医学杂志.

CHEN Meng-shi1, ZHUZhi-min2, LI Ning3. The Effect of Cryotreat on Tensile Properties of Medium Melting-point and High Melting-point Castable Alloy[J]. West China Journal of Stomatology.

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