Issue 91

91

RESEARCH

2 Nguyen Tien Tai, Hoang Anh Tuan, Nguyen Hong Hai, Le Thi Hong Nhung, Ngo Duy Thin: The fabrication process of TiAl6Nb7 applied for bone-reinforcement implants

9 Tran Si Trong Khanh: A study on manufacturing technology for boron carbide (B4C) from raw materials of Thai Nguyen coal pitch and boric acid

ADVANCED TECHNOLOGY, EQUIPMENT AND MATERIALS

16 Saeed Ghali, Mamdouh Eissa, Hoda El-Faramawy: High nitro- gen high carbon low manganese stainless steel

27 M. A. Elkader, A. M. Fathy, G. M. Megahed, M. M. Eissa, S.A. Shama and A. M. El-Sharkawy: Influence of direct-reduced iron percentage in EAF charge mix on EAF operation parameters

FACTS & NEWS

39 Nguyen Van Sua: Vietnam steel industry in the first 6 months 2020

42 Report on activities of the Hanoi Foundry-Metallurgy Society and its orientations in coming years

45  VFMSTA: The world pig iron production in 2019

ENVIRONMENT

48  Nguyen Duc Khien: Environmental problems in craft villages