回火温度对含铜HSLA钢组织及力学性能的影响.pdfVIP

HotWorkingTechnology2020,Vol.49,No.24

回火温度对含铜HSLA钢组织及力学性能的影响

卢春宁，叶姜，樊雷

(广西柳钢钢铁集团有限公司，广西柳州545002)

摘要：对含铜HSLA钢进行了不同回火温度的热处理试验，并借助OM、SEM、硬度检测、拉伸试验、冲击试验等

手段研究了回火温度对含铜HSLA钢组织和力学性能的影响。结果表明：随着回火温度的升髙，含铜HSLA钢的基体

组织中板条马氏体的板条结构逐渐消失，屈服强度和抗拉强度呈现先升髙后下降的趋势，低温冲击韧性明显提高，韧脆

转变温度降低，硬度在回火温度超过500°C后下降。

关键词：含铜HSLA钢；回火温度；微观组织；力学性能•

DOI:10.14158/j.cnki.1001-3814.

中图分类号：TG156.5文献标识码:A文章编号：1001-3814(2020)24-0150-04

EffectsofTemperingTemperatureonMicrostructureandMechanicalProperties

ofCopper-ContainingHSLASteel

LUChunning,YEJiang,FANLei

(GuangxiLiuzhouIronandSteelGroupCo.,Ltd.,Liuzhou545002,China)

AbstractHeattreatmenttestso：fcopper-containingHSLAsteelatdifferenttemperingtemperatureswerecarriedout,and

theinfluenceoftemperingtemperatureonthemicrostructureandmechanicalpropertiesofcopper-containingHSLAsteelwas

studiedbymeansofOM,SEM,hardnesstest,tensiletestandimpacttest.Theresultsshowthat,withthetempering

temperatureincreasing，thelathstructureoflathmartensiteinthematrixstructureofcopper-containingHSLAsteelgradually

disappears,theyieldstrengthandtensilestrengthshowthetrendoffirstincreasingandthendecreasing,thelowtemperature

impacttoughnessincreasesobviously,andtheductile-briletransitiontemperaturedecreases,thehardnessdecreasesafter

temperingtemperatureexceeds500°C.

Keywordscopper-containingHSLAste