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实验研究了 Cr_(20)Ni_(80)o合金电极棒热裂的原因是:合金 Ca 含量偏高、电极凝固冷速过缓而形成了 Cr_7C_3的晶间连续脆性薄膜,在来自冒口方向的纵向拉应力作用下导致沿晶界 Cr_7C_3和基体的界面开裂。
The reasons for the thermal cracking of Cr20Ti80 alloy rod were studied as follows: the content of Ca in the alloy is too high and the cooling rate of the electrode is too slow to form Cr_7C_3 intergranular continuous brittle film. In the direction of riser Under longitudinal tensile stress, the interface between Cr_7C_3 and the matrix along the grain boundary is cracked.