Effect of Cu content and heat treatment on the properties and microstructure of W-Cu composites produced by hot extrusion with steel cup

被引：21

作者：

Yu, Yang ^{[1
]}

Zhang, Wencong ^{[1
]}

Yu, Huan ^{[1
]}

机构：

[1] Harbin Inst Technol Weihai, Sch Mat Sci & Engn, Weihai 264209, Shandong, Peoples R China

来源：

ADVANCED POWDER TECHNOLOGY | 2015年 / 26卷 / 04期

关键词：

W-Cu composite; Hot extrusion; Heat treatment; Microstructure; Properties; W-40; WT.PERCENT-CU; FUNCTIONALLY GRADED MATERIALS; TUNGSTEN PARTICLE-SIZE; HIGH-PRESSURE TORSION; HYDROSTATIC EXTRUSION; COPPER CONTENT; DENSIFICATION; MICROWAVE; POWDERS; INFILTRATION;

D O I：

10.1016/j.apt.2015.04.012

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this paper, the effect of Cu content on the properties and microstructure of W-Cu composites produced by hot extrusion with steel cup and heat treatment was investigated. W-Cu products were sintered at 1150 degrees C under vacuum conditions for 1 h and then the sintered billets were hot extruded with steel cup at 950 degrees C with extrusion ratio 10.56. After heat treatment, W-Cu composites with highly comprehensive properties will be acquired. Metallographic microscopy and scanning electron microscope were used to observe microstructure. Experimental results showed that when the Cu content (10-20 mass%), a little deformation was observed in W phase. When the percentage composition of Cu is high (30-40 mass%), little deformation appeared in W phase, while main deformation occurred in Cu phase. Tungsten phase contiguity in extruded composites is increasing with the decreasing of Cu content. It is hard to achieve the full densification for W-Cu composite with low Cu content (below 20 wt.% Cu) by plasticity deformation technology with small deformation amount. (C) 2015 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：1047 / 1052

页数：6

共 24 条

[1] Evaluation of microstructure and contiguity of W/Cu composites prepared by coated tungsten powders [J].

Amirjan, M. ;

Zangeneh-Madar, K. ;

Parvin, N. .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2009, 27 (04) :729-733

[2] The effect of sintering temperature on densification of nanoscale dispersed W-20-40%wt Cu composite powders [J].

Ardestani, M. ;

Rezaie, H. R. ;

Arabi, H. ;

Razavizadeh, H. .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2009, 27 (05) :862-867

[3] Thermal and electrical properties of W-Cu composite produced by activated sintering [J].

Chen, Pingan ;

Luo, Guoqiang ;

Shen, Qiang ;

Li, Meijuan ;

Zhang, Lianmeng .

MATERIALS & DESIGN, 2013, 46 :101-105

[4]

Erhardt N. B., MICROSTRUCTURAL EVOL, V147, P16802

[5]

GERMAN RM, 1994, INT J POWDER METALL, V30, P205

[6] Influence of Cu-liquid content on densification and microstructure of direct laser sintered submicron W-Cu/micron Cu powder mixture [J].

Gu, Dongdong ;

Shen, Yifu .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 489 (1-2) :169-177

[7] Tungsten-copper composite production by activated sintering and infiltration [J].

Hamidi, A. Ghaderi ;

Arabi, H. ;

Rastegari, S. .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2011, 29 (04) :538-541

[8] Effects of tungsten particle size and copper content on densification of liquid-phase-sintered W-Cu [J].

Johnson, JL ;

Brezovsky, JJ ;

German, RM .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (10) :2807-2814

[9] Numerical simulation of hot hydrostatic extrusion of W-40 wt.% Cu [J].

Li, D. R. ;

Liu, Z. Y. ;

Yu, Y. ;

Wang, E. D. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 499 (1-2) :118-122

[10] The influence of mechanical milling on the properties of W-40 wt.%Cu composite produced by hot extrusion [J].

Li, Daren ;

Liu, Zuyan ;

Yu, Yang ;

Wang, Erde .

JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 462 (1-2) :94-98

← 1 2 3 →