热水器内胆用热轧搪瓷钢的开发与性能

Development and Performance of Hot Rolled Enamel Steel for Water Heater Tank

通过180 t顶底复吹转炉+LF成分控制及Ti微合金化,连铸成230 mm板坯经1200-1250℃加热,控制轧制后快速冷却至500~700℃卷取等工艺措施,山西太钢不锈钢公司成功开发了热水器内胆用热轧搪瓷钢(/%:≤0.14C,≤0.06Si,≤1.20Mn,≤0.030P,≤0.025S,≤0.10Ti)2 mm热轧钢板。结果表明,热轧钢板经850℃10 min模拟搪烧后仍具有较高的强度(R_(m) 366 MPa)以及良好的成型性能;热轧态晶粒均匀细小,搪烧后晶粒尺寸无明显变化,且有大量第二相粒子弥散析出;工业生产的搪瓷钢经单面搪瓷后表现出良好的抗鳞爆性能;能够满足制作热水器内胆的各项应用要求。

With the process measures including composition controlling by 180 t LD with top-bottom blowing and Ti microalloying by LF,continuous casting into 230 mm slabs and heating at 1200~1250℃,rapid cooling after controlled rolling,coiling at 500~700℃,Shanxi Taigang Stainless Steel Co Ltd has successfully developed 2 mm hot-rolled enamel steel sheet for water heater tank(/%:≤0.14 C,≤0.06 Si,≤1.20 Mn,≤0.030 P,≤0.025 S,≤0.10 Ti).The results show that the steel sheet after simulated enamelling at 850℃for 10 min still has high strength(R_(m) 366 MPa)and good formability;the hot-rolled grain is uniform and fine,and there is no obvious change in grain size after enamel,and there are a large number of second phase particles dispersed precipitation;for commercial produced enamel steel after single-sided enamel,it shows good scale explosion resistance and can meet the application requirements of making water heater tank.