Casting Solidification Behavior of Bimuth in Free-Cutting Copper Alloy
Effect of bismuth on the microstructure and performance of Cu-Se-Bi brass were studied. The microstructure analysis and fracture observation indicated that the content of bismuth has obvious effect on the foundry property of Cu-Se-Bi brass. The bismuth distributes on the boundary of α and β phrase and when the content of bismuth is below 1.0wt%,bismuth freezes on the phrase boundary in form of granule; when the content of bismuth amounts to 2.0wt%,bismuth presents in form of blocks; while when the content of bismuth is beyond 2.5wt%,bismuth lies on the phrase boundary in form of continuous films. The solidification mechanism of bismuth in Cu-Se-Bi brass was discussed through the thermodynamics analysis.
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
B. X. Liu and L. N. Zhang, "Casting Solidification Behavior of Bimuth in Free-Cutting Copper Alloy", Advanced Materials Research, Vols. 189-193, pp. 3941-3944, 2011