段路昭, 苏玉辉, 崔娟, et al. Effect of Carbon and Boron Content on Mechanical Properties of Casting Bloom of Low Carbon Cold Heading Steel at Elevated Temperature[J]. Special Steel, 2015, 36(4): 63-65.
段路昭, 苏玉辉, 崔娟, et al. Effect of Carbon and Boron Content on Mechanical Properties of Casting Bloom of Low Carbon Cold Heading Steel at Elevated Temperature[J]. Special Steel, 2015, 36(4): 63-65.DOI:
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。
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.