有效的改进措施是严格控制杂质含量、将高温焊接工艺改为低温焊接工艺。
The effective methods to avoid the cracking include lowering strictly the content of impurity and adopting low temperature welding process.
通过采取焊前预热、控制焊接线能量和层间温度、焊后保温缓冷等工艺措施，并采用相应的检测方法，保证了胺液吸收塔的低温焊接质量。
According to the test, the welding interlayer temperature of X60 pipeline in the normal and low temperature is analyzed in order to study the influence of its variable range on welding quality.
因此，镇静钢材主要用于低温下承受冲击的构件、焊接结构及其他要求强度较高的构件。
Therefore, the steel is mainly used for low temperature impact of the impact of the components, welding structure and other requirements of higher strength components.
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