Development of Process for Φ55～70 mm Bar of GCr15 Bearing Steel Produced by 220 mm×220 mm Continuous Billet

Special Steel ›› 2007, Vol. 28 ›› Issue (5): 60-61.

Development of Process for Φ55～70 mm Bar of GCr15 Bearing Steel Produced by 220 mm×220 mm Continuous Billet

Chi Wu

School of Materials Science and Engineering , Shanghai Jiaotong University , Shanghai 200030

Received:2007-05-10 Online:2007-10-01 Published:2023-02-15

GCr15轴承钢220 mm×220 mm连铸坯生产Φ55～70 mm棒材的工艺开发

池武

上海交通大学材料科学与工程学院，上海 200030

作者简介:池武(1977-)，男，研究生，工程师，1999年华东冶金学院毕业，金属材料加工研究。

Abstract

Abstract: The process of 100t DCEAF+LF+VD-220 mm×220 mm continuous billet -rolling mill to rollφ 55～70 mm GCr15 bearing steel bar has been developed. Process test results showed that with overheating temperature of molten steel during continuous casting ≤35 ℃,heating time of 220 mm×220 mm billet ≥8 h,rolling reduction 12.58~ 20.38,the central porosity rating of φ55～70 mm finished rolled products of CCr15 bearing steel was ≤1.5,the banded structure rating≤1.5 to meet the requirement of standard GB/T18254-2002.

Key words: GCr15 Bearing Steel, Continuous Casting, Rolling, Central Porosity

摘要： 开发了100 t DC EAF+LF+VD-220 mm×220 mm坯连铸-横列式轧机轧制工艺生产φ55～70 mm GCr15轴承钢材。工艺试验结果表明,当连铸时钢水过热度≤35℃,轧制压缩比为12.58～20.38时,220 mm×220 mm连铸坯的加热时间≥8 h,轧制的GCr15轴承钢φ55～70 mm成品轧材中心疏松≤1.5级,带状组织≤1.5级,可以满足GB/T18254-2002标准要求。

关键词: GCr15轴承钢, 连铸, 轧制, 中心疏松

Chi Wu. Development of Process for Φ55～70 mm Bar of GCr15 Bearing Steel Produced by 220 mm×220 mm Continuous Billet[J]. Special Steel, 2007, 28(5): 60-61.

池武. GCr15轴承钢220 mm×220 mm连铸坯生产Φ55～70 mm棒材的工艺开发[J]. 特殊钢, 2007, 28(5): 60-61.

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