HRB400是钢铁产业政策中重点推广的高强度热轧钢筋。通过3种试验方案，系统研究了Si3N4合金作为增氮剂用于生产V微合金化Ⅲ级钢筋的可行性。结果表明，采用0.5 kg/t Si3N4合金和0.6 kg/t FeV合金完全可以达到甚至超过采用0.5 kg/t VN时的合理V、N配比，且钢筋性能优良稳定，是生产HRB400Ⅲ级钢筋的一种新合金化工艺。
HRB400 is a kind of high strength hot rolled reinforced bar emphatically promoted by the national policy of steel industry. Three experimental schemes were executed to validate the feasibility of producing the Vbearing HRB400 bar with Si3N4 alloy as nitrogen alloy reagent. Results show that 0.5 kg/t VN can be replaced by 0.5 kg/t Si3N4 and 0.6 kg/t FeV for alloying to obtain rational V/N ratio and stable properties of reinforced bars. Thus a new alloying technology for nitrogen addition is to be emerged.
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