采用具有自主知识产权的流变铸造工艺,研究了流变压铸YL112合金铸件中的气孔、流变压铸件的热处理和力学性能.结果表明:采用低固相率半固态浆料的直接压铸工艺可提高压铸件的致密性和力学性能,尤其伸长率提高更为显著,可采用热处理可进一步提高YL112合金的力学性能.在500 ℃固溶处理3 min后,YL112合金的共晶Si已经破碎并球化,固熔处理30 min 的T6热处理工艺可使YL112合金的强度和塑性达到比较好的匹配.
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