
硬化裂纹
Solidification cracking is a critical problem during the welding of nickel-based corrosion-resistance materials.
镍基耐蚀材料的焊接结晶裂纹是该类材料焊接性研究中的关键性问题。
Trans-varestraint test was used to investigate the solidification cracking mechanism of 690 nickel-based alloy surfacing metal.
采用横向可调拘束试验方法研究了690镍基合金焊带堆焊金属的结晶裂纹形成机理。
In order to predict the tendency of low-expansion superalloys on weld solidification cracking, the modified M-F model was used to simulate solute redistribution in weld solidification.
为研究低膨胀高温合金的焊缝结晶裂纹倾向,利用改进的M F模型进行焊接凝固过程溶质再分布的模拟。
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.
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。
It is found that there are solidification cracking within argon arch welding joint between heat exchange pipe and pipe plate and stress corrosion cracking on its surface.
对某台加热器发生泄漏的部位进行了金相、扫描电镜检查,检查出换热管与管板的氩弧焊缝内部存在结晶裂纹且表面存在应力腐蚀裂纹。
Solidification cracking is a frequent and serious welding defect during 690 alloy electro-slag surfacing process.
在690合金焊带电渣堆焊过程中,结晶裂纹是发生最为普遍和影响最为严重的缺陷之一。
It was found that the solidification cracking susceptibility of weld metal increases remarkably as nickel content increases.
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。
Analysis shows that the solidification cracking was always formed and developed along film-like sulphides at columnar grain boundaries.
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。
As a result, a 2-D temperature field model for welding solidification cracking was developed.
在此基础上,建立了二维焊接凝固裂纹温度场计算模型。
Heater leak occurs by direct reason of the stress corrosion cracking, while by other reasons of solidification cracking, small fusion depth of welding joint and non…
应力腐蚀裂纹是造成加热器泄漏的直接原因,结晶裂纹、焊缝熔深小及坡口底部未熔透也是加热器泄漏的原因。
Its tendency to solidification hot cracking large than conventional 300-series austenitic stainless steel.
其凝固热裂纹倾向与常规的300系列奥氏体不锈钢不同。
The solidification analysis on shot cracking proved that hot cracking was influenced by the cooling rate of alloy under uncompensated stage of solidification process.
理论分析认为,合金在不可补缩区的冷却速率变化是改变合金热裂程度的重要因素。
Dynamic cracking behaviors of weld solidification cracks for aluminum alloys at elevated temperature;
进行了不锈钢焊接凝固裂纹温度场分析与数值模拟。
The mechanical fiber reinforcement in Solidification or in the drying process can be reduced to prevent cracking.
在凝固或干燥过程中产生的机械能被纤维筋减弱,防止龟裂。
And massive project practice already confirmed that it can effectively prevent welding hot cracking if the welding metal first precipitation ofδ-ferrite solidification (FA) mode.
大量工程实践和实验研究已经证实,如果焊逢金属以先析出δ铁素体的FA模式凝固,可以有效地防止焊接热裂纹。
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.
定向凝固工艺可有效提高*********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。
凝固裂纹(Solidification Cracking)是金属焊接过程中因凝固收缩和热应力导致的一类缺陷,常见于焊缝或热影响区。其核心机制是熔融金属在冷却时,残余液相无法补偿收缩应力,同时低熔点杂质在晶界处形成脆性薄膜,最终引发开裂。
根据美国焊接协会(AWS)建议,可通过优化焊材成分(如添加锰固定硫)、控制层间温度、采用低热输入工艺等方法降低裂纹倾向。
Solidification cracking(凝固裂纹)是材料科学和工程领域中常见的缺陷,尤其在金属焊接过程中尤为突出。以下是详细解释:
示例:在焊接奥氏体不锈钢时,若未添加稳定化元素(如钛、铌),熔池凝固末期硫、磷等杂质在晶界富集,导致晶界强度下降,最终引发凝固裂纹。
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