强化方式对HRB400E钢筋使用性能的影响  

Influence of strengthening technology on service performance of HRB400E rebar

作　　者：陈昕[1] 

机构地区：[1]中冶建筑研究总院有限公司,北京100088

出　　处：《轧钢》2014年第6期20-23,共4页Steel Rolling

摘　　要：对比分析了TMCP非微合金化（1 ^#试样）和0.03％VN微合金化（2^#试样）两种工艺生产的HRB400E钢筋的焊接和抗震性能差异.主要对焊接热影响区焊缝处的显微硬度和冲击功以及焊接强度作了对比试验,还对衡量抗震性能的强屈比指标进行了对比分析.结果表明,1^#试样HV10整体硬度值高于2#试样大约20～30,,硬度最大处均在焊缝区,1^#试样从焊缝中心向外的硬度呈现明显降低趋势,这主要是因为其焊缝区域产生了贝氏体;此外,1^#试样焊接热影响区的韧-脆转变温度在5℃左右,2^#试样则在10℃左右;1 ^#试样的强屈比范围是1.30～1.35,2^#试样为1.32～1.35,都满足了抗震钢筋的要求.The welding and seismic performance differences of HRB400E rebar produced by TMCP with non-microalloying （No.1 specimen） and 0.03％VN micro alloying （No.2 specimen） were compared.A comparative test was mainly made on the weld seam hardness,impact power and welding strength of the welding heat affected zone.The results showed that HV10 integral hardness value of No.1 specimen was higher than the No.2 specimen about 20-30,the maximum hardness were both in the welding zone,No.1 specimen hardness was significantly decreased from the welding center,mainly because of the bainite in welding heat affected zone.In addition,the ductile brittle transition temperature of welding heat affected zone was 5 ℃ of No.1 specimen,while the No.2 specimen was 10 ℃.The ratio of tensile strength and yield strength of No.1 specimen was 1.30-1.35,while No.2 specimen was 1.32-1.35.

关 键 词：HRB400E钢筋 TMCP工艺 VN微合金化 强化方式 焊接性能 抗震性能 

分 类 号：TG335.64[金属学及工艺—金属压力加工] TG142[一般工业技术—材料科学与工程]