Microstructural Evolution of Gas Atomized Fe-25Cr-3.2C Alloy Powders

钢铁研究学报(英文版), 2011, 18(2): 75-78.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

2.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

3.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

4.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

5.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

6.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

基金项目: National Natural Science Foundation of China(50701030) National Basic Research Program of China(2010CB630802)

Microstructural Evolution of Gas Atomized Fe-25Cr-3.2C Alloy Powders

YANG Min ^1, , SONG Chang-jiang ^2, , DAI Yong-xiang ^3, , ZHU Liang ^4, , LI Ke-feng ^5, , ZHAI Qi-jie ^6,

1.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

2.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

3.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

4.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

5.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

6.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China

Keywords： gas atomization

The microstructural evolution of the gas atomized Fe-25Cr-3.2C powders was investigated by using optical microscope, scanning electron microscope, and X-ray diffraction. The experimental results showed that the atomized Fe-25Cr-3.2C powders were mainly composed of austenite and (Fe,Cr)7 C3 carbide. Eutectic microstructure was developed in the larger particles, whereas dendritic microstructure was obtained in the particles with diameter less than 38 μm. The reason for microstructure change should be the difference of nucleation undercooling for particles.

参考文献

[1]	Do(g)an (O) N .Columnar to Equiaxed Transition in High Cr White Iron Castings[J].Scripta Materialia,1996,35(02):163.
[2]	Satoh T .Rapid Solidification of High Chromium Cast Iron and Properties of PM Alloys[J].Journal of Japan Soc Powder/Powder Metal,2001,48(12):810.
[3]	Carpenter, SD;Carpenter, D;Pearce, JTH .XRD and electron microscope study of an as-cast 26.6% chromium white iron microstructure[J].Materials Chemistry and Physics,2004(1):32-40.
[4]	Adler Thomas A.;Dogan Omer N. .Erosive wear and impact damage of high-chromium white cast irons[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,1999(1):174-180.
[5]	Do(g) an (O) N;Laird Ⅱ G;Hawk J A .Abrasion Resistance of the Columnar Zone in High Cr White Cast Irons[J].WEAR,1995,181-183(Part 1):342.
[6]	Stanislav Lagutkin;Lydia Achelis;Sheikhali Sheikhaliev;Volker Uhlenwinkel;Vikas Srivastava .Atomization process for metal powder[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1):1-6.
[7]	(U)nal Rahmi .The Influence of the Pressure Formation at the Tip of the Melt Delivery Tube on Tin Powder Size and Gas/Melt Ratio in Gas Atomization Method[J].Journal of Materials Processing Technology,2006,180(1/2/3):291.
[8]	Zambon A;Badan B;Norman A F et al.Development of Solidification Microstructures in Atomized Fe-Ni Alloy Droplets[J].Materials Science and Engineering,1997,226-228A:119.
[9]	GUAN Wan bing;GAO Yu-lai;ZHAI Qi-jie et al.Effect of Droplet Size on Nucleation Undercooling of Molten Metals[J].Journal of Materials Science,2004,39(14):4633.
[10]	LIU Shen-quan;HAO Wei-xin;YANG Gen-cang .Rapid Solidification of Cu Pb Hypomonotectic Alloy at High Undercooling[J].Foundry,2006,55(05):444.
[11]	Zhai Q J;Gao Y L;Guan W B et al.Role of Size and Cooling Rate in Quenched Droplet of Sn-Bi Eutectic Alloy[J].Materials Science and Engineering,2006,441A(1/2):278.
[12]	Lee E S;Ahn S .Solidification Process and Heat Transfer Analysis of Gas-Atomized Alloy Droplets During Spray Forming[J].Acta Metallurgica Et Materialia,1994,42(09):3231.
[13]	PRASHANT SHUKLA;R K MANDAL;S N OJHA .Non-equilibrium solidification of undercooled droplets during atomization process[J].Bulletin of Materials Science,2001(5):547-554.
[14]	R. Trivedi;F. Jin;I. E. Anderson .Dynamical evolution of microstructure in finely atomized droplets of Al-Si alloys[J].Acta materialia,2003(2):289-300.
[15]	Kusy M;Grgac P;Behulova M et al.Morphological Variants of Carbides of Solidification Origin in the Rapidly Solidi fied Powder Particles of Hypereutectic Iron Alloy[J].Materials Science and Engineering,2004,375-377A:599.

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