News

2 Second Congress of VN Association for Heat Treatment

3 News from VFMSTA and VSA

Disscussion

5 Ta Quang Hong: On the project of exploitation and pro- cessing of laterite bauxite in South Vietnam

11 Pham Mai Khanh, Dinh Quang Nang, Pham Van Khoi: Status and development tendency of mould mixtures

Advanced Technology

18 Luu Minh Dai, Pham Duc Thang: Recycling and utilization solid wastes from the chromium and nikel plating

Research

26 Truong Ngoc Than, Vu Chat Phac: Atmospheric pressure digestion of Baoloc bauxite concentrates

29 Truong Ngoc Than, Vu Chat Phac: Influence of some para- meters on the decomposition of NaAl(OH)₄ solution obtained from digestion of Baoloc bauxite

32 Tran Quoc Lap: Influence of mechanical energy on sinter- ing of metal powders

35 Tran Quoc Lap, Pham Thao, Vu Lai Hoang: Fabrication of alloying Cu - Fe matrix for sintered structural materials

38 Tran Van Dung, Nguyen Dang Thuy: Microstructure and prop- erty of TiB₂- dispersed Cu-matrix composites produced by mechanical mixing, self propagating high temperature synthesis and spark plasma sintering

43 Tran Quoc Lap, Pham Thao, Vu Lai Hoang: Fabrication of Fe based friction materials Φ MK 11

Environment

47 Nguyen Duc Khien: Gas cleaning during ferro-alloy production

49 Short stories