本文论述了热裂纹的形成与工作条件。
In this paper, we demonstrate the thermal crack formation and its working condition.
热裂纹扩展形态为放射状、平行状和网状。
Thermal crack propagation patterns are the radial, parallel-like and reticular.
螺旋埋弧焊管在成型过程中容易产生内焊热裂纹。
Hot cracks commonly occurred in inside weld as the forming process of SSAW pipe.
提出了该合金采用TIG焊接防止热裂纹产生的措施。
Adopting TIG welding is an effect measure to prevent heat cracking.
本文使用基于温度场的凝固补缩模型来进行热裂纹数值模拟。
Hot crack numerical simulation has been handled by 'solidification-feeding' model based on temperature field.
加大外部拘束会在一定程度上削弱随焊激冷防止热裂纹的效果。
Increase external restraint will reduce to some degree the effect of preventing hot cracking by trailing intense cooling.
两种合金焊缝组织的差异造成A合金有更高的焊接热裂纹敏感性。
The different microstructure caused higher welding hot cracking susceptibility of a alloy.
众所周知，在铸造生产中，热裂纹是一种极容易产生的铸造缺陷。
It is known that the heat crack is the most common casting defects in foundry production.
泡沫铝常见的内部缺陷主要有底部无泡层、局部无泡区和内部热裂纹。
There are three main interior structure defects in the preparation of aluminum foam with melt foaming process such as free-bubble-layer at the bottom, partial free-bubble-zone and heat crack.
随焊冲击碾压是一种控制薄壁结构焊接应力变形、防止热裂纹的新方法。
Weld with trailing impactive rolling (WTIR) is a new technique to reduce the residual stress and distortion and prevent hot cracking of thin-walled structure.
讨论了电磁热裂纹止裂时脉冲放电瞬间的电流、温度和热应力的耦合关系。
The coupling of current, temperature and stress has been proposed in crack arresting by the electromagnetic heat effect at the moment when a pulse current is switched on.
在不同的切削条件下，疲劳裂纹和热裂纹是造成刀具材料失效的主要原因。
The formation of the fatigue cracks and the thermally induced cracks are mainly responsible for the failure of the ceramic tool materials under various cutting conditions.
仅就铸钢件而言，据统计，由于热裂纹造成的废品约占废品总数的20%以上。
Take the steel castings as an example, about 20% of the total casting rejects are due to the heat crack defects.
增加焊缝中的共晶数量并改善其分布形态，从而有助于降低焊缝金属的热裂纹敏感性。
The improvement of microstructure leads to a considerable reduction of the susceptibility of hot cracking of weld metal as indicated by the transverse-varestraint test.
本文经过实验，从实践和理论上，研究了预热方法对消除夹送辊堆焊冷裂纹和热裂纹的影响。
Through experiment from reason and practice, the influence of the preheating method on eliminating crack of pinch roller in the surfacing welding was discussed .
在热裂纹萌生和扩展的同时伴随着氧化腐蚀，氧化腐蚀缩短裂纹的孕育期，促进裂纹的萌生。
There is oxidation and corrosion in the incubation and propagation of cracks, which shorten the incubation period of crack and promote the crack to incubate.
再热裂纹与再热脆化的机理相同，两者同时发生，降低应力防止再热裂纹并不能防止再热脆化。
Mechanism of reheat embrittlement and reheat crack is the same. Reheat embrittlement cannot be avoided by reducing stress.
同时，稀土使合金的热裂纹形成温度降低，增加了热裂纹形成应力，降低了合金的热裂倾向性。
Moreover, they are able to decrease the temperature and increase the stress of hot cracking formation, as a result, decrease the tendency of hot cracking.
在热裂试验的基础上，得到了铸件热裂纹倾向的临界值，进而实现了摇枕、侧架的热裂纹预测。
The critical value of hot crack has been obtained according to the experiments on test casting, and it had been used on predicting the hot crack of bolster and side bearer.
本文介绍了厚壁压力容器再热裂纹的产生机理，分类和特点，探测方法，影响因素及预防措施等。
The mechanism of the reheat cracking in thick-walled pressure vessels, its classification, features, detection methods, influencing factors and precautions are described.
仿真计算结果表明在收口型燃烧室边缘开适当大小的圆弧槽对减少活塞热裂纹的产生是行之有效的。
The method that made groove at the edge of the piston with the toroidal combustion chamber and helped to reduce the thermal stress and thermal crack has been discussed. The simulation result...
分析了AM 60 B合金热裂纹形成的机制，讨论了压铸工艺对AM 60 B合金热裂纹的影响。
Influence of Die Casting Process on Hot-crack and its formation mechanism of AM60B alloy are discussed.
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。
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.
焊点中存在的主要缺陷是气孔，表面下塌，热裂纹，其中气孔主要为氧化膜气孔和匙孔不稳定形成的气孔。
The main defects of laser spot welding of aluminum are crater, hot crack and porosity which created by oxide film and keyhole instability,.
从生产实际出发，分析了锻模液态模锻成形过程中热裂纹形成的主要原因，提出了降低锻模热裂纹的几点措。
In the paper, the hot crack for the forging die made by methods of squeeze casting is analyzed, how to reduce the hot crack is also given out.
利用扫描、电子探针及能谱分析技术，从母材、热裂纹断口形貌等方面分析了8090合金热裂纹敏感性高的原因。
The reasons of hot cracking susceptibility are analyzed through electronic-scanning, electronic-probing and energyspectrometric methods on the patterns of fracture surface of hot crack and base metal.
利用扫描、电子探针及能谱分析技术，从母材、热裂纹断口形貌等方面分析了8090合金热裂纹敏感性高的原因。
The reasons of hot cracking susceptibility are analyzed through electronic-scanning, electronic-probing and energyspectrometric methods on the patterns of fracture surface of hot crack and base metal.
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