氮气保护在铸钢丸生产水幕造粒中的应用  

Application of nitrogen protection in water curtain granulation of cast steel shot production

作　　者：赵松乔 张峰伟 ZHAO Songqiao;ZHANG Fengwei(Zibo TAA Metal Technology Co.,Ltd.,Zibo 255000,Shandong China)

机构地区：[1]淄博大亚金属科技股份有限公司,山东淄博255000

出　　处：《中国铸造装备与技术》2020年第5期21-24,共4页China Foundry Machinery & Technology

摘　　要：通过对铸钢丸生产水幕造粒过程添加氮气保护,探索了不同氮气流量对硅、锰氧化率及铸钢丸空心、异形的影响。发现在一定范围内,随着氮气流量的增加,硅、锰氧化率逐渐降低,但是当氮气流量超过20m^3/h时,铸钢丸成形变差,空心率和异形率增加,实际生产过程中建议选用氮气流量约为20m^3/h,既可以保证1.4mm粒级钢丸硅、锰氧化率分别为47.43%和34.01%;1.4mm^0.3mm粒级钢丸硅、锰氧化率分别为11.95%和21.94%;钢水~0.3mm粒级钢丸硅、锰氧化率分别为61.06%和62.32%,又可以保证2.36mm钢丸空心率、异形率分别为10.8%和10.7%;2.0mm钢丸空心率、异形率分别为8.1%和9.3%;1.4mm钢丸空心率、异形率分别为7.9%和8.8%。By adding nitrogen protection to the water curtain granulation process for the production of cast steel shots, the effects of different nitrogen flow rates on the oxidation rate of silicon and manganese and the hollow and irregular shapes of the cast steel shots have been explored. It is found that within a certain range, as the nitrogen flow rate increases, the oxidation rate of silicon and manganese gradually decreases. However, when the nitrogen flow rate exceeds 20 m^3/h, the cast steel shot forming becomes worse, and the hollow rate and irregularity rate increase. It is recommended in the actual production process The nitrogen flow rate is about 20 m^3/h, which can not only ensure that the oxidation rates of silicon and manganese for 1.4 mm grain grade steel shots are 47.43% and 34.01% respectively;and the oxidation rates of silicon and manganese for 1.4 mm to 0.3 mm grain grade steel shots are 11.95% and 21.94%;while the oxidation rates of silicon and manganese of-0.3 mm grain grade steel shot are 61.06% and 62.32% respectively, but also ensures the hollow rate and irregularity rate of 2.36 mm steel shot are 10.8% and 10.7% respectively;the hollow rate of 2.0 mm steel shot are 8.1% and 9.3% respectively;1.4 mm steel shot are 7.9% and 8.8% respectively.

关 键 词：氮气保护 铸钢丸 水幕造粒 氧化 空心异形 

分 类 号：TG733[金属学及工艺—刀具与模具]