李英, 聂爱诚, 吴小林, et al. Effect of Quenching and Tempering Process on Mechanical Properties of Spring Steel 60Si2CrVAT[J]. Special Steel, 2006, 27(4): 61-62.
李英, 聂爱诚, 吴小林, et al. Effect of Quenching and Tempering Process on Mechanical Properties of Spring Steel 60Si2CrVAT[J]. Special Steel, 2006, 27(4): 61-62.DOI:
杭钢用80 t UHP DC电弧炉-钢包炉(LF)-200 mm×200 mm连铸及700×1/650×3轧机轧制
生产直径75 mm的Q390B低合金高强度圆钢。LF精炼时控制(%)0.16-0.19C
1.35-1.52Mn
0.03~0.05V
≤0.025S
≤0.025P
喂CaSi线并全程吹氩
连铸采用长水口保护浇注。检验结果表明
钢材具有良好的表面质量、低倍组织
夹杂物≤2.0级
钢的σB 380~465 MPa
σb 545~625 MPa
δ22.0%-28.5%
A
k
98-210 J。
Abstract
The φ18 mm high strength spring steel 60Si2CrVAT(0.57C
1.65Si
1.04Cr
0. 13V)was produced by 100 t EBT EAF-LF(VD)- 300 mm×320 mm billet casting process at Xingcheng Special Steel. The S+ P content in finished steel was ≤200×10
-6
and average oxygen content ≤12×10
-6
.Because the V carbon-nitride couldn't be dissolved completely below 900 ℃
the heat treatment test was carried out to obtain that the tensile strength was 1950~1970 MPa and elongation was 9%~12% by quenched at 910 ℃ for 60 min and tempered at 410 ℃ for 90 min.