图为EA4T钢低温拉伸断口形貌,由图可知,随着试验温度的降低,断口撕裂棱减少,对比DZ2(连铸)钢可以看出,0℃下,DZ2、EA4T钢撕裂棱相当,当试验温度低于-20℃时,EA4T钢撕裂棱基本与0℃相当,并未显著减少。
The figure shows the tensile fracture morphology of EA4T steel at low temperature. As can be seen from the figure, the fracture tearing edge decreases with the decrease of the test temperature. Compared with DZ2 (continuous casting) steel, it can be seen that the tearing edge of DZ2 and EA4T steel is similar at 0℃, and the tearing edge of EA4T steel is basically similar to 0℃ when the test temperature is below -20℃, without significant reduction.