CAJ | 학술논문

采用先进的铁模覆砂铸造技术和废钢增碳技术，选择合适的化学成分和控制工艺来生产QT750-5合成球铁凸轮轴，其力学性能为：抗拉强度超过≥750 MPa，断后伸长率≥5％；基体组织是铁素体和珠光体的混合基体，基本无自由渗碳体和磷共晶存在，实现了内燃机凸轮轴材质从传统合金铸铁向高强高韧性球墨铸铁发展的飞跃。
채용선진적철모복사주조기술화폐강증탄기술，선택합괄적화학성분화공제공예래생산QT750-5합성구철철륜축，기역학성능위：항랍강도초과≥750 MPa，단후신장솔≥5％；기체조직시철소체화주광체적혼합기체，기본무자유삼탄체화린공정존재，실현료내연궤철륜축재질종전통합금주철향고강고인성구묵주철발전적비약。
The cast QT750-5 synthetic ductile iron camshaft was produced by using the advanced iron coated sand casting technology and scrap steel carburizing technology,with choosing the proper chemical composition and controlling production process. The tensile strength of the cast QT750-5 synthetic ductile iron camshaft was more than or equal to 750 MPa,and the elongation is greater than or equal to 5%. The matrix microstructure was the mixed matrix of ferrite and pearlite,and there was no free cementation and phosphorus eutectic. The development of the engine camshaft material from the traditional alloy cast iron to high strength and toughness ductile iron has been realized.