无自由碳保护渣在冷镦钢模铸上的应用  

Application of Powder without Free Carbon for Ingot Casting Cold Heading Steel

作　　者：朱祖民[1] 蔡得祥[1] 张晨[1] 庄铁[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900

出　　处：《特殊钢》2008年第5期47-49,共3页Special Steel

摘　　要：为减少0.03%～0.07%C冷镦钢10.3 t模铸锭的增碳,开发了不添加炭素材料保护渣,主要成分(%)为TC 1.10～1.22,Al_2O_35.03～5.62,Na_2O3.29～3.40;CaO/SiO_2=0.55～0.58。该保护渣具有高的熔化温度(1 300℃),高粘度(1 500℃,1.5 Pa·s),低容重(0.38～0.40 g·cm^(-3)),因此能降低保护渣的熔化速度(1 500℃,5.70～5.96 g/min)。生产试验表明,钢坯增碳发生率≤5%。The powder no-adding carbon of which the main ingredient is TC 1.10 - 1.22, Al2 O3 5.03 - 5.62, Na2O 3.29- 3.40, CaO/SiO2 = 0. 55 - 0. 58 has been developed to reduce the reearburization of 10. 3 t ingot of 0. 03 - 0.07C cold heading steel. The powder has high melting temperature （ 1 300 ℃ ） , high viscosity （ 1.5 Pa · s at 1 500 ℃ ） and low bulk density （ 0. 38 - 0.40 g · cm^-3 ） , that is available to decrease melting speed of powder （ 5.70 - 5.96 g/min）. Pilot production results showed that the occurred ratio of reearburization was ≤5%.

关 键 词：冷镦钢 模铸 无自由碳保护渣 

分 类 号：TG316[金属学及工艺—金属压力加工]