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 ›› 2015, Vol. 36 ›› Issue (4): 63-65.

• 组织和性能 • 上一篇    下一篇

碳和硼含量对低碳冷镦钢连铸坯高温力学性能的影响

段路昭, 苏玉辉, 崔娟, 李永超, 刘超   

  1. 邢台钢铁有限责任公司,河北省线材工程技术研究中心,邢台054027

  • 收稿日期:2015-02-15 出版日期:2015-08-01 发布日期:2022-08-26
  • 作者简介:段路昭(1986-),男,硕士(北京科技大学),工程师,2010年燕山大学(本科)毕业,高级冷撤钢线材产品的开发与研究。

Effect of Carbon and Boron Content on Mechanical Properties of Casting Bloom of Low Carbon Cold Heading Steel at Elevated Temperature

Duan Luzhao, Su Yuhui, Cui Juan, Li Yongchao , Liu Chao   

  1. Hebei Engineering Research Center for Wire Rod, Xingtai Iron and Steel Co Ltd, Xingtai 054027
  • Received:2015-02-15 Published:2015-08-01 Online:2022-08-26

摘要: 试验的低碳冷镦钢(/%:0.14~0.20C,≤0.20Si,0.3~1.0Mn,≤0.030P,≤0.035S,0~0.001 9B)连铸坯的生产流程为80 t BOF-LF-280 mm×325 mm坯连铸工艺。通过Gleeble-3500热模拟机研究了0.14%~0.20%C和0~0.001 9%B对该冷镦钢600~1 200℃力学性能的影响。结果表明,该钢第Ⅲ脆性区为700~900℃,当钢中C含量较高时,最低塑性的温度较低,硼促使该钢700~950℃脆性区出现两个低谷,但当硼含量增加到0.001 9%时,该钢的高温塑性得到改善。在850~1 200℃,各试验钢的塑性良好,适合较大程度的变形,矫直温度和热加工温度宜控制在850℃以上。

关键词: 碳, 硼, 低碳冷镦钢, 连铸坯, 高温力学性能

Abstract: The production flowsheet for casting bloom of test low carbon cold heading steel (/% :. 0.14 ~0.20C, ≤0.20Si, 0.3 ~ 1.0Mn, ≤0.030P, ≤0.035S, 0 ~0.001 9B) is 80 t BOF-LF-280 mm x 325 mm bloom casting process. The effect of 0. 14% 〜0. 20% C and 0 ~ 0. 001 9% B on mechanical properties of the cold heading steel at 600 ~ 1 200 °C has been studied by using Gleeble-3500 thermal simulation machine. Results show that the III brittle zone of the steel is 700 ~ 900 ℃, as the C content in steel is higher the temperature of minimum plasticity of steel is lower; the boron promotes to occur of two valleys in 700 ~ 950℃ brittle zone, but as the B content in steel is up to 0. 001 9% , the elevated temperature plasticity of steel is improved. At 850 ~ 1 200 ℃ each test steel has better plasticity to be suit for larger deformation, therefore straightening and hot-working temperature should be controlled at more than 850 °C.