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国家自然科学基金(50075053)

作品数:17 被引量:111H指数:7
相关作者:张鸿冰阮雪榆徐祖耀张斌柳建韬更多>>
相关机构:上海交通大学上海应用技术学院兰州理工大学更多>>
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17 条 记 录,以下是 1-10
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NUMERICAL SIMULATION OF HEATING AND QUENCHING PROCESSES FOR A 280 CONNECTING ROD OF 16V280ZJ DIESEL LOCOMOTIVE
2002年
A modified temperature-phase transformation-stress coupled 3D non-linear mathematical model and a series of subroutines on the non-liner MARC (MARC Analysis Research Corporation) are developed. Then this modified model has been utilized to simulate the heat treatment processes of 280 connecting rod of 16 V280ZJ diesel locomotive. The simulation results are basically in agreement with the experiments, which testify that the mathematical model and method are feasible. In addition, the simulation can not only obtain the transient temperature and micro structure of heat treatment process, but also provide a sound scientific basis for the heat treatment workers.
J.S. Ye, Z.R. Ye, A. Yang,and Y.LuaSchool of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China Ziyang Internal-Combustion Factory of Sichuan, Ziyang 641000, China
关键词:NON-LINEAR
A Mathematical Modei for Forecasting Distortion of Workpieces with Phase Transformation on Cooling Process
2003年
A temperature phase transformation stress coupled 3D nonlinear mathematical model has been proposed for forecasting distortion of workpieces on the cooling processes in this paper. Moreover, a series of subroutines were developed on the MARC (analysis research corporation) software platform and the simulation result is basically identical with the experimental one that measured on the workpiece shape with LEITZ equipment. This verifies that the mathematical model and method are feasible.
JiansongYEYikangLIUYuanjunZHOU
关键词:NONLINEARITYDISTORTION
Heat Treat ment of Die and Mould Oriented Concurrent Design被引量:1
2006年
Many disadvantages exist in the traditional die design method which belongs to serial pattern. It is well known that heat treatment is highly important to the dies. A new idea of concurrent design for heat treatment process of die and mould was developed in order to overcome the existent shortcomings of heat treatment process. Heat treatment CAD/CAE was integrated with concurrent circumstance and the relevant model was built. These investigations can remarkably improve efficiency, reduce cost and ensure quality of R and D for products.
LI XiongZHANG Hong bingRUAN Xue-yuLUO Zhong-huaZHANG Yan
关键词:MOULD
钢中动态再结晶力学测定及其数学模型被引量:17
2003年
采用物理模拟的方法 ,对 W1 8Cr4V高速钢和 H1 3热作模具钢热变形过程中的动态再结晶规律进行了研究 ,提出采用加工硬化率 -应变图可以判断动态软化的开始和结束所对应的应变 .与传统的采用应力 -应变图的方法相比 ,该方法具有准确、直观的优点 .采用该方法 ,可以判断动态软化的类型 .建立了 W1 8Cr4V高速钢和 H1 3热作模具钢的动态再结晶的动力学。
张鸿冰张斌柳建韬
关键词:动态再结晶数学模型
形变条件对热变形过冷奥氏体相变的影响被引量:10
2003年
热变形造成的奥氏体组织结构的变化将影响到热变形奥氏体在随后冷却过程中的相变.依据热模拟试验结果,研究了变形温度、变形速率、变形量和变形后高温停留影响相变过程的微观物理本质,认为变形促进热变形奥氏体的相变,提出变形温度、变形速率和变形后高温停留时间对热变形奥氏体转变过程没有直接联系,但可以通过对再结晶过程的控制影响相变过程.再结晶虽然可能细化了晶粒,但大量消耗了热变形奥氏体中的晶体缺陷,其结果是迟滞了相变过程.
张斌张鸿冰
关键词:热变形动态再结晶相变
35CrMo钢动态再结晶的实验研究与数值模拟被引量:9
2004年
通过单道次压缩试验,并结合动态再结晶唯象理论,获得35CrMo钢动态再结晶数学模型,同时应用MARC软件对动态再结晶过程进行数值模拟,与实验结果比较可得出,该模型能较精确地反映动态再结晶规律。
叶健松徐祖耀
关键词:动态再结晶数值模拟
COMPUTER-AID ANALYSIS FOR CRACKING OF 280 CONNECTING ROD OF 16V280ZJ DIESEL LOCOMOTIVE ON QUENCHING PROCESS被引量:3
2004年
280 connecting rod is one of the most important parts for 16V280ZJ diesel locomotive, so it needs much better mechanical performance. However, the crack is often generated at the middle section of connecting rod body on heat treatment process. A temperature-phase transformation-stress coupled 3D non-linear mathematical model has been developed to analyze the reasons of cracking. The simulation and experimental results show that the compressive stress on the cracking position is close to the fracture stress of connecting rod and the reasons of crack are mainly contributed to the carbon content excess of original material or the aging of quenchant.
J.S.YeA.YangY.Luo
关键词:CRACKNON-LINEAR
Modeling for Formation of Proeutectoid Ferrite in Steel during Continuous Cooling被引量:4
2004年
The 1Cr18Ni9Ti specimens were treated respectively with pulse current under 520 V and 2 600 V during solidification and the solidification structure was observed. The results showed that pulse current can refine solidification grains, cut primary dentrities remarkably and reduce second dentritic arm spacing. The mechanism and effect are changed with operation parameters.
YEJian-songCHANGHong-bingTYHsu
6W-5Mo-4Cr-2V高速钢深冷处理微观组织结构的分析被引量:21
2002年
借助 SEM、TEM和 X-射线衍射仪研究了深冷处理对 6 W- 5 Mo- 4Cr- 2 V高速钢微观组织结构的影响 .研究表明 ,深冷处理不仅可使残余奥氏体减少 ,而且可细化马氏体孪晶 ,促使析出纳米级碳化物 ,并附着在马氏体孪晶带上 .深冷处理既能提高材料的硬度 ,也使材料的韧性略有增加 .对磨损表面进行 SEM观察发现 ,深冷试样的磨损形貌迥异于未深冷试样 ,说明它们的磨损机制不同 .深冷处理使 6 W- 5 Mo- 4Cr- 2
李雄李士燕张鸿冰阮雪榆
关键词:深冷处理残余奥氏体马氏体耐磨性
两种结构钢的热变形行为及其数学模型被引量:5
2006年
采用热物理模拟的方法,对35CrMo和20CrMnTi结构钢热变形过程的动态再结晶行为进行了研究,获得了应力-应变曲线,并讨论了热变形参数对该曲线的影响,得出了两种钢发生动态再结晶的临界条件,得到了两种钢的变形参数与Z参数的关系,建立了两种钢的动态再结晶动力学、晶粒尺寸的数学模型。
张鸿冰张斌
关键词:结构钢热变形数学模型
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