Sintering of injection molded M2 high-speed steel

被引：53
作者：
Liu, ZY [1 ]
Loh, NH [1 ]
Khor, KA [1 ]
Tor, SB [1 ]
机构：
[1] Nanyang Technol Univ, Sch Mech & Prod Engn, Singapore 639798, Singapore
来源：
MATERIALS LETTERS | 2000年 / 45卷 / 01期
关键词：
powder injection molding; high speed steel; sintering; tool steel; supersolidus liquid phase sintering;
D O I：
10.1016/S0167-577X(00)00070-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The sintering of injection molded M2 high speed steel (HSS) was studied. The sintering parameters investigated were: sintering atmosphere, heating rate, sintering temperature and sintering time. Mechanical properties and SEM microstructures were used to determine an optimum sintering schedule. It was found that sintering in vacuum is better than in nitrogen as densification is faster in the former. In vacuum sintering, effective sintering took place in the range 1190-1210 degrees C, whereas in nitrogen atmosphere, effective sintering occurred form 1250 degrees C to 1270 degrees C. A heating rate of 10 degrees C/min is preferred since a higher heating rate of 30 degrees C/min resulted in distortion. Near full density was obtained within 10 min after reaching an optimum sintering temperature of 1210 degrees C. However, the maximum ultimate tensile strength of 752.6 MPa was obtained after 2 h of sintering in a vacuum. (C) 2000 Elsevier Science B.V. All rights reserved.
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页码：32 / 38
页数：7
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