T形接头焊接残余应力与变形的有限元研究 

T型焊接接头在船舶及桥梁工业中广泛应用。然而,众所周知焊接接头中的应力集中将会缩短工件的使用寿命,并造成焊接结构的尺寸不稳定性。焊接过程的局部加热以及其后的快速冷却会在T型接头的焊趾处产生拉伸残余应力。另外,焊接过程的热应力所引起的结构变形也会影响焊接结构的抗弯强度。有限元方法提供了一种获得焊接过程中由于热...
哈尔滨工程大学  硕士论文  2010年 下载次数(373)| 被引次数(1)

Nb和线能量对X70管线钢热影响区粗晶区组织及性能的影响 

钢铁由于其好的性能被广泛地应用于各行各业。然而,钢铁的应用都不可避免地使用到焊接,并且在焊接后其焊接接头的性能,尤其是韧性会由于粗大的组织和一些其他因素严重下降。有很多因素会影响热影响区的韧性,比如基体组织,马氏体/奥氏体岛的含量、分布和晶粒尺寸等。 在本论文中,通过在Gleeble3800上进行热模拟试验,研究...
武汉科技大学  硕士论文  2012年 下载次数(101)| 被引次数(2)

用有限元法预测焊接变形和残余应力 

为了制定合理有效的船体结构设计基本原则,对船体分段的焊接变形作仿真计算是很有必要的。仿真计算的最终目标是给出一个最适宜的焊接流程,使得结构因焊接产生的残余变形和残余应力降到最小。焊接过程中会有多种物理现象同时发生,在本论文中,通过具体算例阐述了焊接的基本原理和各参数之间的关系,表明了有限元计算的...
哈尔滨工程大学  硕士论文  2006年 下载次数(878)| 被引次数(2)

Thermal insulation constructal optimization for steel rolling reheating furnace wall based on entransy dissipation extremum principle 

Analogizing with the heat conduction process, the entransy dissipation extremum principle for thermal insulation process can be described as: for a fixed bounda...
《Science China(Technological Sciences)》  2012年 第12期 下载次数(69)| 被引次数(13)

Numerical simulation on heat transfer inside rotating porous disk subjected to local heat flux 

Numerical simulation was carried out to study the centrifugally-driven flow and heat transfer inside rotating metallic porous disk subjected to local heat flux....
《Science China(Technological Sciences)》  2013年 第07期 下载次数(50)| 被引次数(3)

Effect of Heat-Insulating Layer Thickness on Melting Rate of Ice Fixed Abrasives Polishing Pad 

The formula of the thickness of the heat-insulating layer is deduced via heat transfer analysis,according to the principle of heat transfer in limited space.Pol...
《Transactions of Nanjing University of Aeronautics an…》  2015年 第04期 下载次数(23)| 被引次数(1)

Research on modeling of heat source for electron beam welding fusion-solidification zone 

In this paper, the common heat source model of point and linear heat source in the numerical simulation of electron beam welding (EBW) were summarized and intro...
《Chinese Journal of Aeronautics》  2013年 第01期 下载次数(62)| 被引次数(8)

Effect of Heat Input on the Microstructure and Mechanical Properties of 07MnCrMoVR Weld Joints 

As a new type of low cracking suscepbility high strength steel,07MnCrMoVR steel has excellent weldability,with low carbon equivalent and cold cracking suscep...
《Chinese Journal of Mechanical Engineering》  2011年 第02期 下载次数(155)| 被引次数(5)

Influence of welding heat input on the HAZ of hot-rolled high strength steel 

When welding the hot-rolled high strength steel manufacture by thermal-mechanical controlled process(TMCP),there has a soften zone in the heat affected zone(...
《Baosteel Technical Research》  2010年 第S1期 下载次数(126)| 被引次数(0)

Research on Gradient Heat Treatment of Dual-property Disk for Alloy FGH96 

The transient temperature field in the dual-property disk of alloy FGH96 was investigated during the solution heating process of the gradient heat treatment by ...
中国材料大会2012第19分会场:高温合金论文集  2012-07-13 下载次数(13)| 被引次数(0)

Numerical simulation of boundary heat flow effects on directional solidification microstructure of a binary alloy 

The boundary heat flow has important significance for the microstructures of directional solidified binary alloy.Interface evolution of the directional solidifi...
《China Foundry》  2010年 第03期 下载次数(51)| 被引次数(1)

Utilization and recycling of low-temperature waste heat of stainless steel continuous annealing furnace 

Stainless steel continuous annealing furnace is mainly used for heat treatment of hot-rolled strip steel.The combustion air will be enabled to heat to 520℃by...
《Baosteel Technical Research》  2010年 第S1期 下载次数(62)| 被引次数(0)

Heat shock behavior of permanent die during non-solid near-net forming process 

Heat shocks caused by alloy melt and coat spraying are the main reason of die plastic deformation and early fracture. Based on theoretical analysis of heat shoc...
《Transactions of Nonferrous Metals Society of China》  2009年 第S3期 下载次数(59)| 被引次数(0)

The microstructure of a single crystal superalloy after different aging heat treatments 

To study the influence of aging heat treatments on the microstructure of single crystal superalloys with high content of refractory elements and optimal the agi...
《Rare Metals》  2018年 第03期 下载次数(26)| 被引次数(1)

The numerical analysis of thermal effect and weld shaping of DE-GMAW under composite heat source 

The action of the composite heat source model in DE-GMAW has been carried out according to the characteristics of the DE-GMAW process,and the distribution of su...
《China Welding》  2016年 第02期 下载次数(29)| 被引次数(1)

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