CAJ | 학술논문

通过合理的化学成分设计，采用转炉、LF、RH、连铸、控制轧制与预硬化热处理工艺，成功开发出LGP20CH模具用钢并批量生产。实物质量检验表明，钢板钢质纯净度高，主要为B类夹杂物，级别在1.5级以下，钢板组织为回火索氏体，晶粒度达到9级以上，100%超声波检验合格，无气孔、针眼缺陷；整张钢板硬度波动值不超过4 HRC，完全满足用户使用要求。
통과합리적화학성분설계，채용전로、LF、RH、련주、공제알제여예경화열처리공예，성공개발출LGP20CH모구용강병비량생산。실물질량검험표명，강판강질순정도고，주요위B류협잡물，급별재1.5급이하，강판조직위회화색씨체，정립도체도9급이상，100%초성파검험합격，무기공、침안결함；정장강판경도파동치불초과4 HRC，완전만족용호사용요구。
Through the reasonable chemical composition design and adopting the converter-LF-RH-continuous casting-controlled rolling-pre-hardening process, LGP20CH die steel was successfully developed and was entered batch production now. The product quality inspection showed that the plates have a high purity with B type inclusions below 1.5 level, the microstructure of plates is tempered sorbite, the grain size of plates is above 9 grade, and all of plates have passed the ultrasonic testing, without blowhole, pinhole defects;Moreover, the hardness fluctuation of whole plate is within 4 HRC, completely meeting user’s requirements.