高压扭转对铜粉锥形件温压成形的改善

中国机械工程 ›› 2011, Vol. 22 ›› Issue (15): 1875-1879.

高压扭转对铜粉锥形件温压成形的改善

章凯;李萍;薛克敏

合肥工业大学,合肥,230009

出版日期:2011-08-10 发布日期:2011-08-24
基金资助:
国家自然科学基金资助项目(50875072)；安徽省优秀青年科技基金资助项目(10040606Y21)；霍英东教育基金资助项目(121053)
National Natural Science Foundation of China（No. 50875072）;
Anhui Provincial Science and Technology Foundation for Distinguished Young Scholars( No. 10040606Y21)

Improvement of Pure Copper Powder Cones Warm Processed by High-pressure Torsion

Zhang Kai;Li Ping;Xue Kemin

Hefei University of Technology, Hefei, 230009

Online:2011-08-10 Published:2011-08-24
Supported by:

National Natural Science Foundation of China（No. 50875072）;
Anhui Provincial Science and Technology Foundation for Distinguished Young Scholars( No. 10040606Y21)

摘要/Abstract

摘要：

以薄壁锥形件为研究对象,在300℃下将高压扭转工艺应用于铜粉锥形件成形,研究其致密性、显微组织和显微硬度规律,并与相同条件下成形的温压锥形件进行比较。结果表明：温压扭锥形件的相对密度达到0.9605,比温压锥形件提高了5.06%;高压扭转工艺对锥形件的晶粒细化程度在52%~66%之间,明显高于压制工艺的36%;温压扭锥形件口部、中部和锥部的平均显微硬度较温压锥形件分别提高了223%、9%和6%;温压锥形件显微硬度分布规律为中部最高,口部最低,且同一位置内壁高于外壁;温压扭锥形件的显微硬度分布为从锥部到口部逐渐升高,其锥部的显微硬度分布规律与温压锥形件一致,口部和中部的显微硬度分布规律则与温压锥形件刚好相反。

关键词:

铜粉, 高压扭转, 温压成形, 锥形件, 显微组织, 显微硬度



Abstract:

HPT was used to forming thin-wall cone of pure Cu powder at 300℃. The rules of compactness, microstructure and microhardness were studied, and they were compared with the cone processed by warm compaction at the same condition. It is shown that the relative density of the warm HPT cone reaches 0.9605, and it increases 5.06% compared with the warm compaction cone. The grain refinement of the cone processed by HPT is from 52% to 66%, and it is higher than 36% which processed by compaction. The average microstructure at mouth part, middle part and cone part from the warm HPT cone is increased 223%, 9% and 6% respectively, which compares with the warm compaction cone. It indicates that the middle part and the cone part have the highest and lowest microhardness respectively in the warm compaction cone, and the microhardness of ektexine is higher than inwall at the same part. The microhardness increases form cone part to mouth part in the warm HPT cone, and the distribution rules at cone part are the same as the warm compaction cone, however the mouth part and the middle part are contrary.

Key words: Cu powder, high-pressure torsion(HPT), warm compaction process, cone, microstructure, microhardness

中图分类号:

TG319

章凯, 李萍, 薛克敏.

高压扭转对铜粉锥形件温压成形的改善

[J]. 中国机械工程, 2011, 22(15): 1875-1879.

ZHANG Kai, LI Ping, XUE Ke-Min.

Improvement of Pure Copper Powder Cones Warm Processed by High-pressure Torsion

[J]. China Mechanical Engineering, 2011, 22(15): 1875-1879.

参考文献

[1]薛克敏[1],吴战立[1],李萍[1],王晓溪[1],贾建磊[1].纯铝等径角挤扭新工艺数值模拟及实验研究[J].中国机械工程,2010(12):1485-1489.
[2]李萍[1],薛克敏[1],周明智[1].铝粉烧结材料等通道转角挤压的性能演变[J].材料研究学报:577-581.
[3]Zhilyaev A P, Langdon T G. Using High--pressure Torsion for Metal Processing: Fundamentals andApplications [J]. Progress in Materials Science, 2008,53(6) :893-979.
[4]Wetscher F,Vorhauer A,Pippan R. Strain Harden ing during High Pressure Torsion Deformation[J]. Materials Science and Engineering, 2005,410/411 :213-216.
[5]Hebesberger T, Stuwe H P, Vorhauer A, et al. Structure of Cu Deformed by High Pressure Torsion [J]. Acta Materialia, 2005,53 (2) : 393-402.
[6]Kim H S. Finite Element Analysis of High Pressure Torsion Processing [J]. Journal of Materials Pro cessing Technology,2001,113(1/3) :617-621.
[7]Vorhauer A,Pippan R. On the Homogeneity of De- formation by High Pressure Torsion [J]. Scripta Materialia, 2004,51 ( 9 ) : 921-925.
[8]李琦[1],李萍[1],薛克敏[1],王晓溪[1],贾建磊[1].纯铝粉末烧结体锥形件高压扭转有限元模拟及实验[J].中国机械工程,2010(11):1370-1373.
[9]谢子令[1],武晓雷[1],谢季佳[1],洪友士[1].高压扭转铜试样的微观组织与压缩性能[J].金属学报:803-809.
[10]薛克敏[1],张君[1],李萍[1],黄科帅[1].高压扭转法的研究现状及展望[J].合肥工业大学学报：自然科学版,2008,31(10):1613-1616.
[11]Ayisit O. The Influence of Asymmetries in Shaped Charge Performance[J]. International Journal of Impact Engineering, 2008,35 (12) : 1399-1404.
[12]李如江[1,2],沈兆武[1],刘天生[2].铜粉末药型罩试验研究[J].工程爆破,2008,14(3):18-20.
[13]贾万明[1],张全孝[1],白志国[1],马少华[1],姚懂[1],王瑛琦[2].药型罩制造技术的发展[J].稀有金属材料与工程:1511-1516.
[14]韩欢庆[1],姜伟[1],张鹏[1],褚征军[1].金属粉末在药型罩中的应用[J].粉末冶金工业,2004,14(3):1-4.
[15]王毅[1],姜炜[1],刘宏英[1],陈伟凡[1],安崇伟[1],宋小兰[1],李凤生[1].粉末药型罩材料及其工艺技术的研究进展[J].含能材料:555-559.