| 半固态加工中的触变强度及其影响因素研究 |
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| 引用本文： | 宁海青,王艳彬,赵祖德,陈强.半固态加工中的触变强度及其影响因素研究[J].金属成形工艺,2010(2):34-38. |
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| 作者姓名： | 宁海青 王艳彬 赵祖德 陈强 |
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| 作者单位： | [1]中国兵器工业第五九研究所,重庆400039 [2]国防科技工业精密塑性成形技术研究应用中心,重庆400039 |
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| 摘 要： | 结合半固态金属具有触变性的特点，提出触变强度是触变点对应的应力，阐述了触变强度的研究意义，并结合高固相率下半固态金属等温压缩真应力-应变曲线研究了外变量包括坯料的加热温度、应变速率、保温时间和内变量包括固相体积分数、晶粒尺寸、晶粒的球形度、结构参数、半固态材料的固相屈服强度、半固态材料的初始表观粘度等对触变强度的影响。
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| 关 键 词： | 触变强度 触变点 真应力-应变曲线 外变量 内变量 |
Research on Semi-solid Processing of Thixotropic Strength and Influencing Factors |
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| NING Hai qing,WANG Yah-bin,ZHAO Zu-de,CHEN Qiang.Research on Semi-solid Processing of Thixotropic Strength and Influencing Factors[J].Metal Forming Technology,2010(2):34-38. |
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| Authors: | NING Hai qing WANG Yah-bin ZHAO Zu-de CHEN Qiang |
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| Affiliation: | 1. No. 59 Institute of china ordnance industry, Chongqing 400039, China; 2. National Defence Research and Application Center of Precision Plastic Forming Technology, Chongqing 400039, China) |
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| Abstract: | According to the thixotropic characteristics of semi-solid metal, the paper presentes that thixotropic strength is the stress corresponding at the thixotropic point and explaines the significance of research. Combined with the stress-strain curve of semi solid alloy isothermal compression at the high solid fraction, the influence of thixotropic strength on exogenous variables and internal variables is studied. The exogenous variables include heating temperature, strain rate and holding time. The internal variables include solid-phase volume fraction, grain size, grain sphericity, structural parameters, solid-phase yield strength and the initial apparent viscosity of semi-solid materials. |
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| Keywords: | thixotropic strength thixotropic point stress-strain curve exogenous variables internal variables |
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