News

2 Ngoc Chien: Vietnam steel industry: intergration and devel- opment process

4 Forward to 2nd congress of Vietnam Association for Heat treatment

6 Phung Viet Ngu: Establisment of center for Science and

Technology of Metals

7 Pham Chi Cuong: On the new investment projects for Vietnam steel industry

10 Truong Duc Chinh: Development orientation of the mineral industry for period (2006-2010) and next year

Advanced Technology

14 Dang Le Toan: The necessary colaboration between designer, mechanical engineer and heat-treatment tech- nologist

18 Nguyen Phu Ap: On the heat treatment problems related to improvement of quality for Vietnamese bycicles

21 Nguyen Van Chien, Pham Xuan Kinh, Ngo Van Quyen, Mai Thi Thanh: Production of red powder from pirit slag of Lam Thao chemical and superphosphate company

26 Le Trong Hau, Ly Quoc Cuong, Le Thu Quy, Do Thi Thuc, Dao Bich Thuy, Nguyen Van Tuan, Mai Duc Thang: Microstructure and the heat-resistance of the titanium-diffused copper.

30 Nguyen Khac Cuong, Nguyen Trong Dan, Le Thu Quy: Zinc coating on steel for corrosion resistance

Research

34 Nguyen Huu Dung: Austempered ductile iron (ADI) alloyed with copper

39 Nguyen Kim Thiet, Pham Kim Dinh, Dinh Tien Thinh: Preparation of electrolyte solution for tin

43 Nguyen Khac Xuong, Tran Nhu Bien, Do Minh Duc: Simultaneous influence of transition metals (Ti, Mn, Cr) on microstructure and recrystallization temperature of deformation aluminium alloys of system Al-Zn-Mg

Environment

48 Nguyen Duc Khien: Refining of gas from electric are fur- nace

Short stories

50 P.V.N.: The Yen Tu copper pagoda-awonder of Vietnam