摘要
采用WS-4非自耗电弧熔炼炉熔炼制备了w(A)l为5%～10%ZG45Cr28Ni48W5Si2高温合金样品,用Mef3光学金相显微镜研究了其金相组织,用EPMA-1600电子探针分析了组织中各元素的分布,并研究了合金室温压缩性能和硬度。结果表明:未加入铝时,合金基体为FeCrNi固溶体γ相;当加入铝时,铝元素最初固溶于基体中,当铝含量为7.5%时,在基体中析出大量黑色金属间化合物(Ni,Fe)Al相,基体转变为FeCr固溶体α相,当铝含量增加到10.0%时,基体转变为FeCrNiAl相;随铝含量的增加,合金屈服强度、硬度均大幅提高。
The ZG45Cr28Ni48W5Si2 alloy samples with （5-10） wt.% aluminum were prepared with WS-4 non-consumable arc furnace. Their metallurgical structures were investigated by Mef3 optical metallurgical microscope, the EPMA-1600 electron probe was used to analyze the distribution of the elements, and then the compression property and hardness of the alloy samples were investigated at room temperature. The results show that without addition of AI, the phase of alloy matrix is y-phase FeCrNi solid solution; when AI is added, the aluminium is firstly dissolved into the metal matrix and with the 7.5 wt.% AI addition, the alloy matrix transfers to a-phase of FeCr solid solution and large numbers of black intermetallic （Ni, Fe） AI phases precipate in the alloy matrix, and then with the10.0 wt.% aluminium addition, the phase of alloy matrix changes to FeCrNiAI. With the increase of AI content, the yield strength and hardness of the alloys are improved significantly.
出处
《铸造》
CAS
CSCD
北大核心
2009年第9期940-943,共4页
Foundry
