铬、锰对HRB400钢筋力学性能的影响

特殊钢 ›› 2019, Vol. 40 ›› Issue (4): 59-61.

铬、锰对HRB400钢筋力学性能的影响

高菊¹，闫绍维²，马立兴¹，尹金枝¹

1华北理工大学迁安学院，迁安064400;
2河北唐银钢铁有限公司，唐山063000

收稿日期:2019-03-09 出版日期:2019-08-01 发布日期:2022-05-15
作者简介:高菊(1980-),女，硕士 (2009年河北理工大学)，讲师, 2003年河北理工大学(本科)毕业，凝固理论与钢质量控制研究。
基金资助:
华北理工大学青年基金项目资助(Z201624)

Effects of Cr and Mn on Mechanical Properties of Steel Bar HRB400

Gao Ju¹ ,Yan Shaowei², Ma Lixing¹ ， Yin Jinzhi¹

1 School of Qian' An, North China University of Science And Technology, Qian' An 0644CX
2 Hebei Tangyin Iron Steel Co Ltd,Tangshan 063000

Received:2019-03-09 Published:2019-08-01 Online:2022-05-15

摘要/Abstract

摘要： 针对钢中残留铬元素含量高的特点,在试验室条件下分析研究了几组不同Cr、Mn含量试验用钢,铬、锰合金元素含量对HRB400试验钢筋力学性能及显微组织的影响;并利用扫描电镜、电子探针等手段分析了HRB400试验钢筋力学性能与珠光体含量、析出物微观组织的关系。结果表明,在锰含量分别为1.15%、1.25%、1.35%低、中、高锰条件下,随Cr含量的增加,试验钢筋屈服强度、抗拉强度随之提高,微量铬元素起一定的强化作用,从而可减少Mn元素加入量;Cr含量由0.1%增加至0.3%珠光体含量增加,且晶粒度平均在8～9级,钢中有Cr-Fe-Mn复合合金渗碳体和铬碳化物析出;0.125～0.135%Mn,0.20%Cr试验钢筋组织和力学性能达到国标规定的要求;且根据试验结果并结合当前合金元素的价格,吨钢可节约成本约20元。

Abstract: Concerning the phenomenon of high residual Cr in steel bar,the influence of the mass fraction of Cr,Mn alloy elements on the mechanical properties and microstructure of HRB400 test steel bars in laboratory conditions is studied. The relationship between mechanical properties and the content of pearlite, and the microstructure of precipitated particles was also analyzed by transmission electron microscopy. The experimental results are as follows. At low, medium and high Mn content of 1.15% ,1.25% and 1.35% respectively, the yield strength and tensile strength of test steel bars raised with the increase of Cr. Cr played a certain strengthening role,which can reduce Mn addition. The content of pearlite raised with increasinhg Cr from 0.1% to 0.3% ,the average grain size was 8 ~9,Meanwhile,Cr-Fe-Mn composite alloy cementite and Cr carbide have been precipitated from steel. The microstructure and mechanical properties of the reinforced rebar with 0.125% _0.135%Mn,0.20% Cr meet the requirements of international standard. Based on the test results and the current price of alloying elements, the cost per ton of steel can be reduced by about 20 yuan.

高菊, 闫绍维, 马立兴, 尹金枝. 铬、锰对HRB400钢筋力学性能的影响[J]. 特殊钢, 2019, 40(4): 59-61.

Gao Ju , Yan Shaowei, Ma Lixing , Yin Jinzhi. Effects of Cr and Mn on Mechanical Properties of Steel Bar HRB400[J]. Special Steel, 2019, 40(4): 59-61.