| 深冷处理对钴铬钼高熔铸造合金拉伸力学性能的影响 |
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| 引用本文： | 陈孟诗,朱智敏,李宁.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,2004,22(3):252-254. |
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| 作者姓名： | 陈孟诗 朱智敏 李宁 |
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| 作者单位： | 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 |
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| 基金项目： | 四川省科学基金资助项目 (0 2sy0 2 9_1 30 ) |
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| 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。
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| 关 键 词： | 深冷处理 钴铬钼高熔铸造合金 拉伸力学性能 |
| 文章编号： | 1000-1182(2004)03-0252-03 |
| 收稿时间： | 2004-06-25 |
| 修稿时间： | 2003年9月15日 |
The Effect of Cryotreat on Tensile Properties of Medium Melting-point and High Melting-point Castable Alloy |
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| CHEN Meng-shi,ZHU Zhi-min,LI Ning..The Effect of Cryotreat on Tensile Properties of Medium Melting-point and High Melting-point Castable Alloy[J].West China Journal of Stomatology,2004,22(3):252-254. |
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| Authors: | CHEN Meng-shi ZHU Zhi-min LI Ning |
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| Affiliation: | 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 |
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| 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 SEM to study the mechanism that changes the tensile 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 larger than G2. SEM images of G2 and G3 showed that secondary-carbonide separated out all over the alloy.Conclusion The results obtained above suggest that cryotreat is an effective method in enhancing tensile properties of CW-H Co-Cr-Mo cast alloy. |
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| Keywords: | cryotreat CW-H Co-Cr-Mo cast alloy tensile property |
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