EFFECT OF RARE EARTH ADDITION ON PROPERTIES OF CONTROLLED ROLLING LOW CARBON MnMoNb FERRITE STEEL.

被引：0
|
作者：
Jiang, Jingkai [1 ]
Xiao, Lianfang [1 ]
You, Delin [1 ]
Shu, Jiasheng [1 ]
Ren, Li'e [1 ]
机构：
[1] Baotou Research Inst of Metallurgy, China, Baotou Research Inst of Metallurgy, China
来源：
Jinshu Xuebao/Acta Metallurgica Sinica | 1987年 / 23卷 / 02期
关键词：
IRON AND STEEL METALLOGRAPHY - Microstructures - METALLOGRAPHY - Ferrite - METALS AND ALLOYS - Fracture - ROLLING MILL PRACTICE;
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摘要：
A study was made of the effect of rare earth (RE) additions on the microstructure and fractograph of the controlled-rolling, low-carbon MnMoNb ferrite steel. After further refinement of grains, as well as the reduction and refinement of bainite and martensite, a mixed structure of equiaxial and acicular ferrite in the steel may be achieved by RE additons. The ultramicrostructural RE inclusion, permitting the formation of RE-containing steel for the refinement of grains in the process of controlled rolling, is observed on the fracture surface. Therefore, a satisfactory combination of mechanical properties, such as improved strength and impact toughness, may be approached for steel containing RE additions.
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