非调质钢加热过程的硫化物转变和形貌控制.pdfVIP

HotWorkingTechnology2023,Vol.52,No.3

非调质钢加热过程的硫化物转变和形貌控制

齐建军，张志新，孙超

（河钢集团钢研总院，河北石家庄050023

摘要：非调质钢的要求高，除硫化物含量外，还需要控制其形貌、分布。对非调质钢硫化物高温形变机理进行了

研究。结果表明，当钢加热时，钢中的硫化物随着温度的提高和保温时间的延长，开始发生形变，小的硫化物逐渐溶

解到基体中，较大的硫化物发生延伸、溶解、断裂、球化等一系列的形貌转变，且钢奥氏体化后，硫化物变化更加明

显。当加热温度达到1200℃时，形变更加活跃，随着保温时间延长，钢中长条形的硫化物断裂碎化加快，数量增多。

关键词：非调质钢；干切；高温形变机理；硫化物尺寸

D0I:10.14158/ki.1001-3814

中图分类号：TG335.11文献标识码：A

SulfideTransformationandMorphologyControlduringHeating

ofNonQuenchedandTemperedSteel

QIJianjun,ZHANGZhixin,SUNChao

(GeneralSteelResearchInstituteofHBISGroupCo.,Ltd.,Shijiazhuang050023,China)

Abstract:Inadditiontosulfidecontent,themorphologyanddistributionofnonquenchedandtemperedsteelwithhigh

requirementsneedtobecontrolled.Thehightemperaturedeformationmechanismofsulfideinnonquenchedandtempered

steelwasstudied.Theresultsshowthatwhenthesteelisheated,thesulfideinthesteelbeginstodeformwiththeincreaseof

temperatureandtheextensionofholdingtime.Thesmallsulfidegraduallydissolvesintothematrix,andaseriesof

morphologicalchangessuchasextension,dissolution,fractureandspheroidizationoccurinthelargersulfide.Afterthe

austenitizingofthesteel,thesulfidechangesmoreobviously.Whentheheatingtemperaturereaches1200°C,thedeformation

becomesmoreactive.Withtheextensionofholdingtime,thefractureandfragmentationoflongstripsulfideinsteel

acceleratesandthenumberincreases.

Keywords:non-quenchedandtemperedsteel;drycutting;hightemperaturedeformationmechanism;sulfidesize

近年来，随着汽车产量和保有量的增加，节能减目前，非调质钢已经广泛应用于汽车行业3],如

排的压力也迅速增大。非调质钢的应用可以有效地38MnVS6