【摘要】 提出在中试水平的空心铜管坯水平连铸过程中施加工频电磁场,分析其对铜管坯组织和性能的影响。结果表明:与未施加电磁场时相比,施加电流强度为140A的工频电磁场后,水平连铸空心铜管坯的组织显著细化,平均晶粒度由未施加磁场时的3.1提高到8.3,周向组织均匀性也得到明显改善;抗拉强度提高40%左右,延伸率提高50%左右。更多还原

【Abstract】 In order to improve the quality of hollow Cu tubes, a horizontal continuous casting technology was developed in a pilot scale by using electromagnetic field of commercial frequency, and the effect of electromagnetic field on structure and mechanical properties were studied. The results show that the structure of hollow Cu tubes is refined substantially with the application of electromagnetic field and the average grain grand is increased from 3.1 to 8.3 and the uniformity along the circumference of the structure is improved obviously at the same time. The tensile strength is increased by 40% and the elongation is improved by 50% averagely if compared to those without electromagnetic field.更多还原