20MnSi生产高强带肋钢筋HRB500工艺及其组织与性能
Process for Producing HRB500 with 20MnSi and Its Microstructure and Mechanical Properties
乔艳萍1, 王淑敏2, 赵文成 2, 杨全宝3
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作者单位：1. 唐山科技职业技术学院 机电系, 河北 唐山 063001; 2. 唐山科技职业技术学院 冶金系, 河北 唐山 063001; 3. 河北唐钢集团 技术中心, 河北 唐山 063016)
中文关键字：HRB500； 化学成分； 组织； 性能
英文关键字：HRB500; chemical composition; microstructure; properties
中文摘要：讨论了?准14mm20MnSi穿水生产HRB500的工艺流程、 化学成分、金相组织和力学性能，提出了合理的C含量控制目标。结果表明：?准14mm20MnSi穿水生产HRB500钢筋时金相组织为：表层回火M，回火M厚度约为钢筋直径的1/8，中间依次形成B、F + P + B混合组织，心部为细小的F + P，F晶粒度为9.0～9.5级，与热轧钢筋相比，穿水钢筋心部P含量多，F晶粒度提高1.0级，钢筋力学性能符合HRB500的要求，达到了降低生产成本的目的。
英文摘要：The QTB process, chemical composition, microstructure and mechanical property of ?准14 mm 20MnSi were discussed. The reasonable carbon content was proposed. The results show that microstructure from the surface to the centre of the tested ribbed bar is temper M, B, F + P + B and F + P, respectively; the thickness of the tempered M is about 1/8 diameter of the ribbed bar. The ferrite grain size in the core of the testing ribbed bar is 9.0～9.5 grade. More pearlite forms in the center and the F grain size grade enhances 1.0 level than that of the hot rolled ribbed bar. The mechanical property of the testing ribbed bar qualifies to HRB500 and the production cost reduces.