摘要
对高硅镍铜合金NCu30-4-2-1进行了短时高温拉伸实验,研究了材料的强度和塑性随温度的变化规律。采用Gleeble-1500热模拟实验机对该合金铸态材料在不同变形温度和应变速率下进行了热压缩变形实验,研究了流变应力受温度和应变速率影响的变化规律,以及高温变形组织随温度和应变速率变化的规律。结合实际挤压实验,确定了合理的挤压温度和挤压速率范围。该合金的力学性能和挤压成材率得到了大幅度提高。
The variation regularity of the strength and the plasticity of high silicon nickel-copper alloy NCu30-4-2-1 influenced by temperature was investigated by short-time high temperature tensile tests. Hot compression tests of as-cast nickel-copper alloy were performed under the condition of different temperatures and different strain rates with a Gleeble-1500 thermal mechanical simulator. The regularity of the flow stress influenced by temperature and strain rate was researched, and the effects of temperature and strain rate on the deformed microstrueture were studied. Based on the test results, the appropriate extruding temperature and extruding velocity were determined. As a result, the mechanical properties of extrusion bars were greatly improved.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2009年第2期24-28,共5页
Journal of Materials Engineering
关键词
镍铜合金
高温热压缩
挤压温度
挤压速率
nickel-copper alloy
hot compression
extruding temperature
extruding velocity
