eutectic carbide短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 共晶碳化物 The results show that rare earth modification and heat treatment all can improve eutectic carbide morphology and increase the impact toughness, and both comprehensive result is more noticeable. 结果表明：稀土变质及热处理均能改善碳化物的形貌，提高其冲击韧度，且两者的综合作用效果更明显。 cnki