CAJ | 학술논문

对HRB400钢筋进行了穿水工艺、金相组织、化学成分以及力学性能等方面的分析.结果表明:穿水后钢筋表面金相组织为表层回火索氏体(S),过渡区为F+P+B+回火S,心部F+P,试验钢筋穿水后抗拉强度和屈服强度分别提高84MPa和38MPa,伸长率下降较小.通过穿水工艺可以降低合金元素含量,或用HRB400方坯生产HRB500钢筋,增加经济效益.
대HRB400강근진행료천수공예、금상조직、화학성분이급역학성능등방면적분석.결과표명:천수후강근표면금상조직위표층회화색씨체(S),과도구위F+P+B+회화S,심부F+P,시험강근천수후항랍강도화굴복강도분별제고84MPa화38MPa,신장솔하강교소.통과천수공예가이강저합금원소함량,혹용HRB400방배생산HRB500강근,증가경제효익.
The QTB process of HRB400 was discussed, the microstructure, chemical composition and mechanical properties of HRB400 bar were analyzed. The results show that the microstructures from surface to centre of the tested bar are temper S, F + P + B+ temper S and F+P respectively; the tensile strength and yield strength of the tested bar increase to 84 MPa and 38 MPa respectively. The percentage elongation decreases little. So we can reduce alloying elements content by the QTB process or producing HRB500 with the HRB400 billets to increase economic efficiency.