摘要
开发的窄淬透性带20CrMnTiH齿轮钢的生产工艺流程为铁水预脱硫-130 t BOF-LF-RH-280 mm×280mm坯连铸-轧制至Φ60 mm圆钢。通过设计的内控成分(/%:0.18~0.20C,0.20~0.30Si,0.90~0.98Mn,≤0.025P,≤0.010S,0.05~0.07Ti,≤0.001 50),设立结晶器电磁搅拌参数200 A,2.5 Hz,控制拉速0.62 m/min,过热度15~30℃。检验结果表明,化学成分稳定,钢中氧含量≤11.3×10^(-6),非金属夹杂级别≤1.0,带状组织级别≤2.0,淬透性带宽HRC值≤3.5,满足产品协议要求。
The production process fiowsheet for developed gear steel 20CrMnTiH with narrow hardenability band is metal pre-desulphurization-130 t BOF-LF-RH-280 mm × 280 mm bloom casting-rolling to Ф60 mm round bar. With designed interior composition （/% ： 0. 18 - 0. 20C, 0. 20 - 0. 30Si, 0. 90 - 0. 98Mn, ≤ 0. 025P,≤ 0. 010S, 0. 05 0. 07Ti,≤0.001 5O）, setting mold electromagnetism stirring parameters 200 A, 2. 5 Hz, controlling casting speed 0. 62 m/min, liquid superheating extent 15 -30 ℃, the examination results show that the chemical composition is stable, the oxygen content in steel≤ 11.3 ×10^-6, the rating of nonmetallic inclusions ≤ 1.0, the rating of handing structure ≤ 2. 0 and the AHRC value of hardenability band ≤3. 5 to meet the requirement of products specification.
出处
《特殊钢》
北大核心
2018年第1期41-43,共3页
Special Steel
