ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2024, Vol. 45 ›› Issue (1): 23-26.DOI: 10.20057/j.1003-8620.2023-00003

• 产品研发 • 上一篇    下一篇

8.8级非调紧固件用10B21盘条研究与开发

孔祥伟, 白云, 张剑锋   

  1. 江阴兴澄特种钢铁有限公司特钢研究院,江阴 214400
  • 收稿日期:2023-01-06 出版日期:2024-01-30 发布日期:2024-02-01
  • 作者简介:孔祥伟(1988―),男,硕士,工程师

Research and Development of 10B21 Wire Rod for 8.8 Grade Non-quenched and Tempered Fasteners

Kong Xiangwei, Bai Yun, Zhang Jianfeng   

  1. Special Steel Institute, Jiangyin Xingcheng Special Steel works Co.,Ltd., Jiangyin 214400 ,China
  • Received:2023-01-06 Published:2024-01-30 Online:2024-02-01

摘要: 采用转炉→精炼炉→真空脱气→方坯连铸→加热→粗轧→中轧→精轧→减定径→吐丝→XDWP(Xingcheng Direct Water Patenting)冷却→斯太尔摩风冷冷却的方式试验生产基于10B21钢的8.8级非调紧固件用热轧盘条。通过控制减定径温度为813 ℃,吐丝温度为828 ℃,斯太尔摩辊道速率设置为0.75 m/s,在连续经过XDWP冷却和斯太尔摩风冷后获得的热轧盘条抗拉强度达到680 MPa,断后伸长率为23.6%,断面收缩率为75%,力学性能完全满足GB/T 29087―2012的要求。且经过1/4冷顶锻和25%的大减面率拉拔试验,其结果满足紧固件用户使用要求。

关键词: 8.8级非调紧固件, 10B21钢, XDWP, 贝氏体

Abstract: Grade 8.8 non-quenched and tempered fastener hot rolled wire rod based on 10B21 steel was test produced by means of converter → refining furnace → vacuum degassing → square billet continuous casting → heating → rough rolling → medium rolling → finishing rolling → diameter reduction → spinning → XDWP (Xingcheng Direct Water Patenting) cooling → Stelmor air cooling . By controlling the reducing diameter temperature to 813 ℃, the spinning temperature to 828 ℃, and the Stelmor roller table rate to 0.75 m/s, the tensile strength of the hot rolled wire rod reached 680 MPa, the total elongation to 23.6%, section shrinkage to 75%, after continuous XDWP cooling and Stelmor air cooling. Mechanical properties fully met the requirements of GB/T29087―2012. After 1/4 cold top forging and 25% drawing test of large reduction rate, the results met the requirements of fastener users.

Key words: 8.8 Grade Non-quenched and Tempered Fastener, 10B21 Steel, XDWP, Bainite

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