ADI风镐缸体铸件组织与力学性能研究
Study on Microstructure and Properties of ADI Pneumatic Cylinder Casting
黄之德,王生玖
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作者单位：常州轻工职业技术学院,南车戚机有限公司
中文关键字：等温淬火球墨铸铁；风镐缸体；显微组织；力学性能
英文关键字：Austempered Ductile Iron（ADI）; Pneumatic Cylinder；microstructure；mechanical properties
中文摘要：研制了一种含Cu、Ni合金成分的风镐缸体铸件，研究和比较了其厚壁和薄壁处铸态和等温淬火态的组织和性能。结果表明：奥贝球铁风镐缸体铸态基体组织为珠光体，并存在有少量铁素体，石墨比较细小、大部分石墨成球形，圆整度较好，球状石墨数量多；采用合适的合金加入和合理的热处理工艺，等温淬火后，厚壁和薄壁处的金相组织皆由贝氏体、奥氏体和少量碳化物组成，此时ADI（等温淬火球墨铸铁）具有较高的强度和塑性，能满足风镐缸体的使用要求，提高风镐的使用寿命，具有良好的经济性。
英文摘要：Development of a Cu, Ni alloy Austempered Ductile Iron Cylinder Casting, study and compare the microstructure and mechanical properties of thick and thin wall of as-cast and isothermal quenching state. The results show that the as-cast microstructure of austempered ductile iron pneumatic cylinder consists of pearlite, and a small amount of ferrite, graphite is small, most of graphite into a spherical shape, good round degree, nodular graphite number is high, microstructure of isothermal quenching consists of bainite, austenitic and a small amount of carbide, austempered ductile iron with high strength and plasticity after isothermal quenching, can meet the requirements for the use of pneumatic cylinder.