铸态高强度高塑性珠光体球墨铸铁的生产(2)

Production of As-cast High Strength High-plastic Pearlite Nodular Iron(Ⅱ)

介绍了铸态高强度高塑性珠光体球墨铸铁的定义、特点、国内外研发情况及技术难点,详细阐述了生产此种球墨铸铁的要求以及应该采取的措施。最后指出:要想生产出铸态高强度高塑性珠光体球墨铸铁,需要在生产优质球墨铸铁的基础上,根据牌号要求和铸件特点,确定基体组织中的铁素体体积分数,再在化学成分设计、铁液净化、合金化、铸型冷却速度等方面采取有效的强化措施,最终保证性能要求。除此之外,建议企业在质量管理上下功夫,确保生产出质量稳定、用户满意的铸件,并且与相关设计部门合作,对铸件的结构进行优化和铸件集成,这样轻量化的效果会更加明显。

The definition,characteristics,domestic and foreign research-development situation and technical difficulties of the as-cast high strength high plasticity pearlite nodular iron were introduced,the requirements and measures for the production of such nodular iron were described in detail.Finally pointed out:in order to produce as-cast high strength and high plastic pearlite nodular iron,it was necessary to determine the ferrite volume fraction in the matrix structure according to the grade requirements and casting characteristics on the basis of producing high quality nodular iron,and then took effective strengthening measures in aspects of chemical composition design,molten iron purification,alloying,casting cooling rate and so on to finally guarantee the properties requirements.In addition,it was suggested that enterprises should work hard on quality management to ensure the production of castings with stable quality and customer satisfaction,and cooperate with relevant design departments to optimize the structure of castings and integrate castings,so that the effect of lightweight will be more obvious.