ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2019, Vol. 40 ›› Issue (3): 49-52.

• 组织和性能 • 上一篇    下一篇

Nb-V微合金化0.15 ~ 0.35Mo含量和轧制温度对建筑用耐火钢性能的影响

陈俊, 陈晨,罗恒勇   

  1. 宜宾职业技术学院,宜宾644003 
  • 收稿日期:2018-11-01 出版日期:2019-06-01 发布日期:2022-05-17
  • 作者简介:陈 俊(1982-),女,硕士(2016年重庆邮电大学),2006年毕业于西南大学(本科)毕业,建筑园林设计及其材料的应用研 究,

Effect of Nb-V Microalloying 0.15 - 0.35Mo Content and Rolling Temperature on Properties of Fire-Resistant Steel for Building

Chen Jun, Chen Chen ,Luo Hengyong   

  1. Yibin Vocational and Technical College, Yibin 644003
  • Received:2018-11-01 Published:2019-06-01 Online:2022-05-17

摘要: 试验钢采用50 kg中频感应炉熔炼,并轧成13mm钢板。试验了R1-0.15MoNb,R2-0.15MoV,R3-0.35MoNbV,R4-0.35MoNbVB和R5-0.35MoNbVTiB耐火钢的轧制温度(1 010~1 050℃)对该钢性能的影响。结果表明,R3钢(/%:0.04C,1.12Mn,0.32Si,0.018P,0.023S,0.35Cr,0.35Mo,0.025Nb,0.15N)在1030℃轧制后具有最佳的综合性能,即抗拉强度598 MPa、屈服强度514 MPa、延伸率28%、屈强比0.86、600℃回火前后HV硬度值分别为215和204、0℃冲击功124J;600℃的屈服强度355 MPa,屈强比为0.69,满足耐火钢国家标准要求。

关键词: Nb-V微合金化, 钼, 建筑, 耐火钢, 组织, 力学性能

Abstract: Tested steels are melting by a 50 kg medium induction furnace and rolling to 13 mm plate. The effect of rolling temperature (1 010 ~ 1 050 ℃) of tested steel 0.15Mo,R2- 0.15MoV, R3- 0.35MoNbV, R4- 0.35MoNbVB and R5- 0.35MoNbVTiB on properties of the steels has been tested. Results show that the R3 steel (/% : 0.04C,l. 12Mn, 0.32Si,0.018P,0.023S,0. 35Cr,0.35Mo,0.025Nb,0.15V) rolled at 1 030 T has excellent comprehensive properties i. e. tensile strength 598 MPa,yield strength 514 MPa,elongation 28% ,ratio of yield-tensile strength 0. 86,the HV hardness scale before and after tempering at the temperature of 600 ℃ respectively being 215 and 204, and impact energy of steel at 0 ℃ being 124 J,and the yield strength of steel at 600 ℃ being 355 MPa with ratio of yield-tensile strength 0. 69 to meet the requirement of state standard for fire-resistant steel.