结果表明：随淬火温度提高，低温回火脆性区向高温区漂移。
The results show with increasing quenching temperature the brittle temperature of the steel tempered at low temperature brittle temperature moves upwards.
在一定的断裂韧度前提下，随着局部脆性区尺寸的增加，焊接热影响区的脆断概率增加。
At a certain fracture toughness value, fracture probability of weldments increases with increase of the local brittle zone size.
此外，还研究了焊接热输入量对局部脆性区断裂韧性的影响，并通过定性、定量的金相显微组织评定对试验结果进行了分析。
In addition, the effect of welding heat input was studied. Qualitative and quantitative metallographic examination of the simulated microstructures was made to assist t...
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