山东冶金
山東冶金
산동야금
SHANDONG METALLURY
2013年
4期
5-7
,共3页
车轮用钢%600MPa级%扩孔率%疲劳寿命
車輪用鋼%600MPa級%擴孔率%疲勞壽命
차륜용강%600MPa급%확공솔%피로수명
wheel steel%600 MPa grade%bore expandability%fatigue life
针对高强度车轮钢高成形性和高疲劳寿命的要求，在C、Mn成分基础上采用Cr等合金化的成分设计，采取分段冷却和中温卷取工艺，济钢开发出高延伸凸缘性能的汽车车轮用钢，其微观组织为铁素体、贝氏体及少量马氏体，抗拉强度在600 MPa以上，延伸率≥24%，扩孔率≥70%，制成的车轮较原普通低合金高强度车轮减重10%以上，车轮弯曲疲劳寿命达到60万次以上。
針對高彊度車輪鋼高成形性和高疲勞壽命的要求，在C、Mn成分基礎上採用Cr等閤金化的成分設計，採取分段冷卻和中溫捲取工藝，濟鋼開髮齣高延伸凸緣性能的汽車車輪用鋼，其微觀組織為鐵素體、貝氏體及少量馬氏體，抗拉彊度在600 MPa以上，延伸率≥24%，擴孔率≥70%，製成的車輪較原普通低閤金高彊度車輪減重10%以上，車輪彎麯疲勞壽命達到60萬次以上。
침대고강도차륜강고성형성화고피로수명적요구，재C、Mn성분기출상채용Cr등합금화적성분설계，채취분단냉각화중온권취공예，제강개발출고연신철연성능적기차차륜용강，기미관조직위철소체、패씨체급소량마씨체，항랍강도재600 MPa이상，연신솔≥24%，확공솔≥70%，제성적차륜교원보통저합금고강도차륜감중10%이상，차륜만곡피로수명체도60만차이상。
In view of requirements of high formability and high fatigue life of high strength wheel steel, the chemical component with Cr alloying based on C and Mn is designed. Through adopting sectioning cooling process and medium temperature coiling process, the automobile wheel steel with high expandability was developed by Jinan steel. The microstructure of this steel is ferrite, bainite and less martensite. Its tensile strength is above 600 MPa, the elongation is above 24%, the bore expansion ratio is above 70%. The wheel weight made by this steel compared with ordinary high strength low alloying steel is reduced by 10%above and bending fatigue life of developed steel exceeds 0.6 million times.
