Globular Microstructure Formation in X210CrW12 Steel for Semi Solid Processing Using Plastic Deformation or Boron Modification

Archives of Metallurgy and Materials

Ł. Rogal¹  J. Dutkiewicz¹ 

[1] INSTITUTE OF METALLURGY AND MATERIALS SCIENCE OF THE POLISH ACADEMY OF SCIENCES, REYMONTA ST. 25, 30-059 KRAKÓW, POLAND

关键词: Keywords: Semi-Solid Processing;    thixoforming;    X210CrW12 steel;    SIMA;    modification;    globular grains;   

DOI  :  10.2478/amm-2013-0066

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Semi-solid processing (SSP) belongs to advance method of forming metal alloys in the solidus-liquidus range. Such technology requires a fine globular microstructure in a semi-solid range, which can be produced by numerous methods. The present paper focuses on two methods of preparation of a globular microstructure in X210CrW12 tool steel as a possible way of preparation of feedstock for thixoforming: hot plastic deformation (SIMA), and modification with boron. DSC analysis allowed to establish the amount of liquid phase fraction vs temperature. Samples were heated up to the semi-solid temperature range - 1230°C, which corresponds to 17% (SIMA) and 30% (modified) of the liquid fraction. Then they were rapidly cooled. The obtained microstructures of samples were investigated for their suitability for SSP. The microstructure of X210CrW12 steel prepared by SIMA shows a globular microstructure with average grain size 57 μm. The samples after modification with 0.08% (weight pct) boron also feature a globular microstructure with the size of 46 μm. The grains possess an austenitic structure and are surrounded by an eutectic mixture

【 授权许可】

Unknown