摘要
通过改进中频感应炉真空熔炼工艺,制备出组织比较致密的铸态Cu-0.4Cr-0.2Zr-0.15Mg合金。改进工艺后试样的抗拉强度和伸长率,比原工艺分别提高了30%和60%以上。通过断口SEM图像及其应力-应变曲线,分析试样塑性、韧性提高的原因。通过SEM、TEM及EDS分析,发现在铸态试样中含有纳米尺寸的Cr单质,这些Cr单质以方形或圆形弥散分布在基体内,在Zr富集区含有Cu5Zr,在铜基体和Zr富集区内还有亚稳定Heusler相CrCu2(Zr,Mg)。
The Cu-0.4Cr-0.2Zr-0.15Mg alloy with sound structure was prepared using an improved medium frequency induction furnace. The tensile strength and elongation are increased by 30 % and by 60 %, respectively, compared with the initial specimen. The improvement mechanism of the strength and plasticity was analyzed by SEM （scanning electron microscope） and stress strain curve analysis. The analy- ses of SEM, TEM （transmission electron microscope） and EDS （energy dispersed spectrum） show that quadrate and spherical nano-scale Cr particles are distributed dispersedly in the copper matrix, and there exists CusZr in Zr enrichment area, and Heusler phase CrCu2 （Zr,Mg）can be observed in the copper matrix and Zr enrichment area .
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2013年第8期699-702,共4页
Special Casting & Nonferrous Alloys
基金
材料先进制备技术教育部重点实验室开放课题基金(KLAMP-1102)
