检索结果-南通市图书馆

Model of primary austenite Dendrite Structure in Hypoeutectic Cast Iron

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Iron and Steel Research International 2003年第1期10卷 33-35页

作者： WU Xu-min YU Xiao-hua XU Jun ZHANG You-ling Wuhan University of Technology

The solidification of primary austenite in hypocutcctic gray cast iron was studied by stepped grinding and quantitative *** dendrite structure of primary austenite can be described by three models:typical dendrite crystal model,metamorphic dendrite crystal model and network dendrite crystal *** dendrite crystals formed according to 3rd model is much more than those formed according to other models in this *** primary austenites are connected each other,and the primary stems of austenite could be regarded as secondary arms and vice versa.

关键词： hypoeutectic cast iron primary austenite dendrite structure

Effect of Carbon on Grain Boundary Segregation of Phosphorus and Phosphorus-Induced Intergranular Fracture in High Purity Iron with Phosphorus

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Iron and Steel Research International 2003年第1期10卷 28-32页

作者： WANGYa－nan LIUChun－ming AnshanUniversityofScienceandTechnology Anshan114002China NortheasternUniversity Shenyang110006China

The solidification of primary austenite in hypoeutectic gray cast iron was studied by stepped grinding and quantitative metallography. The dendrite structure of primary austenite can be described by three models: typical dendrite crystal model, metamorphic dendrite crystal model and network dendrite crystal model. The dendrite crystals formed according to 3rd model is much more than those formed according to other models in this experiment. The primary austenites are connected each other, and the primary stems of austenite could be regarded as secondary arms and vice versa.

关键词： hypoeutectic cast iron primary austenite dendrite structure

Effects of carbon content and solidification rate on thermal conductivity of grey cast iron

在线全文

学校读者我要写书评

暂无评论

引用

China Foundry 2007年第3期4卷 210-214页

作者： Daniel Holmgren Attila Diószegi Ingvar L.Svensson Jnkping University Dept. of Mechanical Engineering/Component TechnologyJnkpingSE-551 11Sweden

The thermal conductivity or diffusivity of pearlitic grey irons with various carbon contents is investigated by the laser flash method. The materials are cast in controlled thermal environments and produced in three dissimilar cooling rates. The cooling rate together with the carbon content largely influence the thermal conductivity of grey iron. Linear relationships exist between the thermal conductivity and the carbon content,the carbon equivalent and the fraction of former primary solidified austenite transformed into pearlite. The work shows that optimal thermal transport properties are obtained at medium cooling rates. Equations describing the thermal conductivity of pearlite,solidified as pre-eutectic austenite,and the eutectic of grey iron are derived. The thermal conductivity of pearlitic grey iron is modeled at both room temperature and elevated temperature with good accuracy.

关键词： grey iron thermal conductivity thermal diffusivity carbon content carbon equivalent colour etching graphite morphology eutectic cell size primary austenite cooling rate