一种含Pt镍基单晶高温合金的凝固行为

金属学报, 2013, 49(12): 1567-1572. doi: 10.3724/SP.J.1037.2013.00141

一种含Pt镍基单晶高温合金的凝固行为

林惠文 ^1, , 周亦胄 ^2, , 张炫 ^3, , 金涛 ^4, , 孙晓峰 ^5,

1.中国科学院金属研究所,沈阳,110016

2.中国科学院金属研究所,沈阳,110016

3.中国科学院金属研究所,沈阳,110016

4.中国科学院金属研究所,沈阳,110016

5.中国科学院金属研究所,沈阳,110016

基金项目: National Basic Research Program of China(2010CB631206) the Program of "One Hundred Talented People" of Chinese Academy of Sciences 国家自然科学基金项目U1037601和51271186,国家重点基础研究发展计划项目2010CB631206及中国科学院百人计划项目资助 National Natural Science Foundation of China(.U1037601 and 51271186)

关键词： Pt , 镍基单晶高温合金 , 凝固行为

SOLIDIFICATION BEHAVIOR OF A Pt-CONTAINING Ni-BASED SINGLE CRYSTAL SUPERALLOY

Keywords： Pt , Ni based single crystal superalloy , solidification behavior

以一种第三代镍基单晶高温合金为载体,通过添加不同含量的Pt,研究了Pt对单晶高温合金凝固特性的影响规律.结果表明,Pt的添加使合金元素的偏析程度加大,共晶含量增大,固溶热处理窗口变窄.由于Pt添加使得合金难以通过固溶热处理消除凝固形成的成分偏析,因此有可能对合金的力学性能产生不利影响.

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