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| 1 | 低合金化铁素体耐热球墨铸铁的合金元素设计显示文摘本文从铁素体耐热球墨铸铁的抗氧化、抗生长、抗疲劳能力以及促进铁素体的形成和石墨球化方面研究了铁素体耐热球墨铸铁的主要合金元素种类及其使用范围。结合铁素体耐热球墨铸铁制备工艺,进一步对各合金元素在铁素体耐热球墨铸铁中的作用、合金元素间的匹配机理以及合金元素匹配用量进行分析。最终得到了合金成分(质量分数,%)为3.6 C,3.9 Si,3.0 Al,1.5 Cr,0.8 Mo,0.6 Ni的高性能低合金化铁素体耐热球墨铸铁。 | 刘志勇 吕士贵 | 2023 | 铸造技术2023，44，9： | 0 |
| 2 | Tailoring Carbon Distribution inα/γPhase of Ductile Iron and Its Effects on Thermal Conductivity显示文摘The effects of carbon distribution on the microstructure and thermal conductivity of ductile iron were investigated in the present study.The microstructure of as-cast and quenched ductile iron were characterized by OM and SEM.Results showed that the microstructure of as-cast ductile iron was composed of spheroidal graphite,ferrite with the volume of 80%,and a small amount of pearlite,and quenched ductile iron was composed of spheroidal graphite,coarse/fine acicular martensite(α_(M)phase)and high-carbon retained austenite(γphase).The volume fraction of retained austensite and its carbon content for direct quenched ductile iron and tepmered ductile iron were quantitatively analysed by XRD.Results revealed that carbon atoms diffused fromα_(M)phase toγphase during tempering at low temperatures,which resulted in carbon content in retainedγphase increasing from 1.2 wt%for the direct quenched sample to about 1.9 wt%for the tempered samples.Consequently,the lattice distortion was significantly reduced and gave rise to an increase of thermal conductivity for ductile iron. | 刘琛 杜玉洲 YING Tao ZHANG Liandong ZHANG Xinyu DONG Dan JIANG Bailing | 2023 | Journal of Wuhan University of Technology(Materials Science)2023，38，3： | 0 |
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