20th International Forgemasters Meeting - IFM 2017

Quality control of large forgings is a manufacturing process by which entities review the quality of all factors involved in production. On one hand, this paper briefly describes the research status of large forgings with the common flaws and their solutions, such as flaw segregation, inclusions & harmful elements, shrinkage cavity & porosity, bubble, discontinuities(crack), over-heating due to high-speed temperature raising in high-temperature sintering, uneven temperature, white spots, and uneven microstructure; On the other hand, it also describes the key quality control and the matters needing attention for each link of the manufacturing process. Aiming at the quality of large forgings, The reasons for creating all above quality problems of large forgings shall be carefully targeted, and various parameters shall be strictly controlled by each production link to reduce the flaws of the large forgings and to guarantee the quality of the products. Keywords: large forgings, quality, manufacturing process and control Company: Handan Zishan Special Steel Group Co. Ltd.