本文關(guān)鍵詞： 蠕墨鑄鐵 力學性能 金相組織 石墨形態(tài) 蠕化率　出處：《鑄造技術(shù)》2017年11期 　論文類型：期刊論文

【摘要】：試驗澆鑄了5種化學成分基本相同,但蠕化率及金相組織均不同的蠕墨鑄鐵試樣,通過金相、拉伸及硬度等試驗,對蠕墨鑄鐵的蠕化率、石墨形態(tài)、金相組織、抗拉強度及布氏硬度進行了測定。研究了蠕化率≥80%的情況下,蠕墨鑄鐵的蠕化率、石墨形態(tài)及金相組織對其抗拉強度和硬度等力學性能的綜合影響及機理。結(jié)果表明,當蠕化率≥80%的情況下,蠕化率的變化并不能顯著影響蠕墨鑄鐵抗拉強度和硬度等力學性能,降低石墨長寬比可以有效提升蠕墨鑄鐵抗拉強度和硬度;當蠕化率≥80%且石墨長寬比為5~9的情況下,珠光體體積分數(shù)對蠕墨鑄鐵抗拉強度和硬度等力學性能的影響最顯著。珠光體體積分數(shù)越高,蠕墨鑄鐵的抗拉強度和硬度等力學性能越好。
[Abstract]:Five kinds of chemical compositions were basically the same, but the vermicular graphite morphology and metallographic structure of vermicular graphite cast iron samples with different vermicular rate and metallographic structure were tested by metallographic, tensile and hardness tests. Tensile strength and Brinell hardness were measured. The vermicularizing rate of vermicular graphite cast iron with vermicular rate 鈮，

本文編號：1487014