水平连铸Φ100 mm铜管坯质量缺陷分析及改进

Quality Defect and Improvement of Production Technology for Horizontal Continuous Casting Φ100mm Copper Tube Billet

水平连铸法生产Φ100 mm TP2铜管坯时,存在表面出现深裂纹和皮下气孔的质量缺陷。以其企业为例,通过对其存在的质量缺陷进行研究分析,并对生产工艺进行改进后,解决了相关问题:通过缩小石墨模具进液孔,可以避免铜管坯表面出现深裂纹,提高模具寿命;通过提高铜液质量,可以有效减少铜管坯的气孔缺陷数量。改进生产工艺后,铜管成品率可从57.6%提高至81.3%。

During the production of Φ100 mm TP2 copper tube billet by horizontal continuous casting, the deep cracks appear on the surface and the subsurface pores appear. Taking a certain enterprise as an example, through the study and analysis of its quality defects, and the improvement of the production process, the relevant problems are solved: the appearance of deep cracks on the surface of copper tube billet can be avoided and the service life of the mould can be increased by reducing the liquid inlet hole of graphite mould. The porosity defect of the billet can be effectively reduced by the control measures to improve the quality of copper liquid. After improving the production process,the yield of copper tube increases from 57.6% to 81.3%.