Forming Mechanism and Processing Control of Hot Crack in Die-casting Magnesium Alloys;
镁合金压铸热裂纹形成机制及工艺对策
Simulation of welding hot cracks in austenitic stainless steel pipe butt joints;
奥氏体不锈钢管道焊接热裂纹缺陷模拟方法
From which,although the welding properties are not the same for different aluminum alloy brands,but the main reason for such aluminum alloy thin-walled tube cracking was not the material itself,and the instability for energy input in welding caused concavity and convexity to arose hot cracks.
分析结果表明,虽然具体铝合金牌号的焊接性能不尽相同,但造成这类铝合金薄壁管焊接开裂的主要原因是焊接中线能量控制不平稳,局部能量过大造成焊接塌陷突起而引发热裂纹。
Mechanism of weld with trailing impact rolling to control residual stresses deformation and hot cracking;
随焊冲击碾压控制焊接应力变形防止热裂纹机理
Strain field analysis of weld with trailing impact rolling to control residual stress and distortion and prevent hot cracking;
随焊冲击碾压减小应力变形防止热裂纹应变场分析
Effect of restraint condition on hot cracking during welding of 2A12T4 aluminum alloy
2A12T4铝合金焊接时拘束条件对热裂纹的影响
For linearity defect of shell circle welding joint which in under working for some plant,through the analysis for welding material and welding groove,we found that the reason for bring the welding thermal crack is more little of welding joint molding efficiency.
根据某厂制造容器的筒体间环向焊接接头出现的线性缺陷,通过分析焊接材料和焊接坡口,确定为因焊缝成形系数过小而导致产生焊接热裂纹。
The causes of thermal cracks and crack exten-sion are analyzed by means of elastic-plastic mechanics, and effective measures preventing thetool from exit failure are presented.
分析了负剪切产生的机理，并给出了负剪切长度的计算公式以及产生负剪切时切削力的表达式；通过对刀具刃区应力分析得知：由于负剪切的形成造成切削力的作用方向发生偏转，使得刀具应力场恶化，导致刀具破损；用弹塑性力学分析了热裂纹的发生及裂纹扩展机制，并给出了防止刀具切出破损的措施。
Based on the numerical simulation of solidification of EMC(electromagnetic casting) slab,a formula estimating the thermal stress and the location where the thermal crack initiates are proposed.
依据电磁铸造（ＥＭＣ）大板坯凝固进程的数值模拟结果，建立了预测热裂纹萌生部位及应力的解析表达式对板坯产生的裂纹及其材质的组织结构的评价表明：热裂纹的萌生与材料的力学性能及组织结构没有必然联系；控制凝固过程中板坯表面温度是减少热裂纹萌生的有效方法。
Experimental study on heat cracks of turbine housing on turbochargers;
涡轮增压器蜗壳热裂纹的试验研究
So the crack is reheat crack,it can be .
通过扫描电镜、能谱仪及光学显微镜对裂纹产生原因进行了深入分析,认为该裂纹属高温形成的再热裂纹,可以通过改变预热、后热温度,提高焊接质量以降低应力集中等方法来防治。
The base metal 15CrMoG component and weldability,welding method,welding material,welding structure,technics parameter,welding process and heat treatment were analyzed,the improving welding measure was put forward,which effectively avoided reheat crack and the other welding defects of certain ship boiler pipe.
通过对15CrMoG钢母材成分及焊接性能、焊接方法、焊接材料、焊接结构、工艺参数、焊接操作和热处理的分析,提出了改进的焊接措施,有效地防止了某船锅炉管再热裂纹和其它焊接缺陷的产生。
After analyzing,the source of the welded joint fracture on the sealing structure of the reheater through the penthouse superheater in a 1025t/h boiler is reheat crack which is caused by high rigidity and high stress concentration of the welding joint,excessive welding energy input and heat stress existing in the joint when operating.
分析某发电厂1025 t/h锅炉再热器穿顶密封结构焊接接头的开裂源于再热裂纹,裂纹的产生原因在于:焊接接头高刚度、高应力集中,过大焊接线能量及接头在运行中存在热应力。
The susceptibility of HCM2S steel to reheat cracking has been studied by y-groove restraint weld cracking tests,which confirm the steel's susceptibility in the temperature range between 690(°C)～760(°C).
通过斜y型拘束焊接试验方法对HCM2S钢的再热裂纹敏感性进行了试验研究。
On the basis of the principles and structures of the cold cracking implant testing machine,the study on the implant equipment of reheat cracking test is reviewed in this paper.
在深入分析冷裂纹插销试验机的原理和结构的基础上,本文进行了插销式再热裂纹试验装置的研究工作。
Welding Thermal Crack Simulation Study on X70 Grade Pipeline Steel
X70级管线钢焊接热裂纹模拟研究
Analysis on Hot Crack for Forging Die Made by Squeeze Casting
锻模液态模锻成形过程中热裂纹形成原因分析
A New Method of Controling Welding Hot Cracking by Welding Based on Electromagnetic Forces;
基于电磁力的焊接热裂纹随焊控制新方法
Study of Using Biaxial Prestressing to Control Welding Distortion and Prevent Hot Cracking;
双向预置应力控制焊接变形及防止热裂纹研究
Investigation the Relationship Between Welding Hot Crack and Grain Size;
焊接热裂纹与母材晶粒粗大的关系讨论
Research on Welding Hot Cracking of High Speed Train Alluminum Alloy
高速列车铝合金材料焊接热裂纹倾向研究
Crack Analysis in Heat Treatment of Cr12MoV Convex Mold;
Cr12MoV凸模热处理裂纹分析
Experimental Research on Crack arrest Using Electromegtic Heating in a Side-crack Under the Action of Mechanical Loading
机械载荷作用下单边裂纹电热止裂的实验研究
Cracking Analysis and Safty Evaluation of Hot-Wall Hydrogenation Reactors's Nozzle's Crack;
热壁加氢反应器接管裂纹断裂与安全评价研究
Research on the Spatial Crack Arrest in Metal Component by Using Electromagnetic Heating;
金属构件中空间裂纹电磁热止裂技术的研究
Crack Arrest of Half-embedding Cracks of In-service 45 Steel Component by Electromagnetic Heating
在役45钢构件半埋藏裂纹的电磁热止裂
BOUNDARY ELEMENT SOLUTION FOR CRACK TIP OF METAL IN ELECTROMAGNETISM-THERMAL FIELD
金属板裂纹尖端电磁热场边界元解析
Study On Longitudinal Surface Cracks On CSP Hot-Rolled Plate
酒钢CSP热轧板卷表面纵裂纹研究
Crack Analysis of Boiler Pendent Reaheater Tubes Made of SA213-TP304H Steel
锅炉屏式再热器TP304H管裂纹分析
Thermal-elastic Fracture of Hollow Cylinder with a Semi-elliptic Surface Crack
含表面裂纹圆柱壳体的热力耦合效应
Preventive measure and the origin of the crack which the stainless steel heat exchanger tube plate
染机换热器管板裂纹成因分析及控制
Shielding Effect Rule of Thermal Fatigue Crack Net and Calculating Method of Stress Intensity Factor of Main Crack
热疲劳裂纹网的屏蔽规律及主裂纹应力强度因子的计算方法
Study on Crack Forming during Hot-charging and Improving of the Medium and Heavy Plate;
中厚板热装热送过程裂纹形成及改善的研究