CAJ | 학술논문

采用半连续铸造方法制备了 A390合金管坯.研究了铸造速度和铸造温度对 A390合金管坯宏微观组织的影响.结果表明：随着铸造速度由90 mm/min 提升至120 mm/min、铸造温度由800℃增加至850℃,管坯中初生 Si 宏观分布趋于均匀,初生 Si 颗粒的平均尺寸逐渐减小.截面尺寸为φ164 mm/φ60 mm的半连续铸造 A390合金管坯的最佳铸造工艺参数为：铸造速度110 mm/min、铸造温度850℃,可以获得初生Si 宏观分布均匀、初生 Si 颗粒平均尺寸不超过26μm 的管坯,管坯内侧的抗拉强度为264 MPa,延伸率为0.5%.
채용반련속주조방법제비료 A390합금관배.연구료주조속도화주조온도대 A390합금관배굉미관조직적영향.결과표명：수착주조속도유90 mm/min 제승지120 mm/min、주조온도유800℃증가지850℃,관배중초생 Si 굉관분포추우균균,초생 Si 과립적평균척촌축점감소.절면척촌위φ164 mm/φ60 mm적반련속주조 A390합금관배적최가주조공예삼수위：주조속도110 mm/min、주조온도850℃,가이획득초생Si 굉관분포균균、초생 Si 과립평균척촌불초과26μm 적관배,관배내측적항랍강도위264 MPa,연신솔위0.5%.
DC casting was used to produce A390 alloy hollow billet.The effects of the casting speed and temperature on the macrostructure and microstructure of A390 alloy hollow billets were studied.The results showed that the distribution of primary Si in the hollow billet became more even and the average size of primary Si particle decreased gradually with the increase of the casting speed from 90mm/min to 120 mm /min and casting temperature from 800 ℃ to 850 ℃, respectively.The optimum casting process parameters for the A390 alloy hollow billets ofφ164 mm /φ60 mm were obtained with the casting speed of 1 10 mm/min and casting temperature of 850 ℃.The primary Si particles uniformly distributed with their average size less than 26 μm obtained under the optimum casting process parameters.The ultimate tensile strength and elongation at the inner wall of the hollow billets were 264 MPa and 0.5%,respectively.