进行了不锈钢焊接凝固裂纹温度场分析与数值模拟。
In this paper, the temperature field of weld metal solidification cracking in the stainless steel was analyzed and simulated.
在此基础上，建立了二维焊接凝固裂纹温度场计算模型。
As a result, a 2-d temperature field model for welding solidification cracking was developed.
对不锈钢凝固裂纹的驱动力即熔池尾部应变场进行了模拟。
This paper has simulated the driving force of solidification crack of stainless steels, namely the, stress strain field in the trail of molten weld pool.
少量铁素体的焊缝凝固裂纹断口上有许多小塑性区，有明显的韧窝。
Some plastic regions could be found and some dimples had been observed on the fracture surfaces of the solidification cracking of austenitic-ferritic weld metals.
结果表明：随着焊缝中含镍量的增加，焊缝金属的凝固裂纹敏感性增大。
It was found that the solidification cracking susceptibility of weld metal increases remarkably as nickel content increases.
分析认为，凝固裂纹是沿偏聚在柱状晶晶界的低熔点膜状硫化物形成并扩展的。
Analysis shows that the solidification cracking was always formed and developed along film-like sulphides at columnar grain boundaries.
本文研究了纯奥氏体焊缝和奥氏体-铁素体焊缝凝固裂纹特征，探讨了铁素体防止焊缝凝固裂纹的作用。
The characteristics of fully austenitic weld metals and austenitic-ferritic weld metals were investigated and the ability ofd-ferrite to prevent solidification cracks was studied.
试验结果得知，坯壳在结晶器内冷却不均，使坯壳凝固层厚薄不同，是铸坯产生表面裂纹的主要原因。
The present work shows that the nonuniform thickness of solidified skin of slab created by the nonuniform cooling rate of the skin in the crystallizer is main cause for slab surface cracking.
对定向凝固合金叶片的裂纹进行分析，在断口观察与金相组织分析的基础上，对叶片的失效模式与失效原因进行研究，并提出预防该类故障发生的措施。
The cracks on blades made of a directionally solidified superalloy were analyzed. The failure mode and cause were studied in virtue of fracture observation and metallographic analysis.
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.
中间层凝固和轴向凝固的出现，不利于获得致密的轧辊组织，促进轧辊产生裂纹。
The appearance of mesosphere solidification and shaft direction solidification was infaust to obtain compact roll structures, that accelerated the roll to produce crack.
定向凝固工艺可有效提高镁合金铸锭的热轧成形能力，在轧制温度为673k的条件下进行热轧，总变形量可达94%以上而不出现裂纹。
Directional solidification could improve hot rolling formability of magnesium ingot effectively. The total deformation could reach 94% without cracking when hot rolling was held at 673k.
研究表明：轮毂的工艺缺陷主要为缩孔、缩松以及凝固过程中收缩导致的裂纹缺陷，主要分布在轮辋、辐条交汇的热节部位。
The results indicate that the casting defects are mainly shrinkage porosity and cracks caused by solidification shrink, which mainly presents in the hot spot between the spoke and the rim.
选择有效结晶温度范围小的铝合金、采用金属型铸型以及逐层凝固的冷却方式可以有效消除裂纹。
To prevent from heat crack, the choose of aluminum alloy with small crystal temperature range and the use of metal cast model, as well as adoption of gradual solidification style will be effective.
选择有效结晶温度范围小的铝合金、采用金属型铸型以及逐层凝固的冷却方式可以有效消除裂纹。
To prevent from heat crack, the choose of aluminum alloy with small crystal temperature range and the use of metal cast model, as well as adoption of gradual solidification style will be effective.
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