论文部分内容阅读
用—60型电炉熔化铁水,用Re—Mg合金做球化剂处理成球铁,然后在SG_2—8—13保温装置中按铸件凝固条件进行模拟性保温试验。球化铁水在炉中长时间保持,可连续或随时取样,观测石墨形态,分析球铁相应的化学成分变化,研究球铁的抗衰退性能和主要影响因素。在C、E值为4.2～4.4％条件下,用Y—Ce—Mg球化剂,RCB复合孕育剂和一定的处理工艺,可使球铁的抗衰退时间延长至274分以上,球化级别可保持2～3级,球墨数量大于45个/mm~2,为生产厚大断面球铁件提供了试验依据.
Melting hot metal with -60 type electric furnace, using Re-Mg alloy as nodulizer to treat ductile iron, and then carrying out simulated insulation test according to casting solidification conditions in SG_2-8-13 heat preservation device. Spheroidized hot metal in the furnace for a long time, continuous or ready sampling, observation of graphite morphology, analysis of changes in the corresponding chemical composition of ductile iron, ductile iron to study the anti-recession performance and the main influencing factors. In the C, E value of 4.2 ~ 4.4% under the conditions of Y-Ce-Mg nodulizer, RCB compound inoculant and a certain treatment process, the ductile iron can extend the anti-recession time to 274 points above the level of the ball Can be maintained 2 to 3, the number of ball ink is greater than 45 / mm ~ 2, for the production of thick nodular ductile iron provides a test basis.