Microstructure of spray-deposited CuCr25 alloys preform and its development during subsequent processing

摘要

The CuCr25 alloys were prepared by spray forming technology, and effect of process parameters on the deposit was studied. The microstructure of CuCr25 alloy prepared by spray forming was studied, and the size of chromium particles was 3-10μm. It is fond that spray-deposited CuCr25 alloys were hot forged and hot isostatically pressed to full densification，and the size of chromium particles was increased little after being hold at 1070°C for 60mins. Conclusions were drawn from the researching results that spray forming was an ideal method to prepare CuCr25 alloys with fine chromium precipitates and homogeneous dispersion. After hot forging and hot isostatic pressing, the size of chromium particles was increased to 10-15μm. the density of the CuCr25 alloy could be 99%.