Dendrite structure and microhardness of as-cast 4Cr5MoSiV1 steel between different homogenisation processes. Issue 18 (12th December 2021)

• Record Type: Journal Article
• Authors: Li, En; Li, Changsheng; Han, Yahui; Ren, Jinyi; Gao, Cairu; Qiu, Chunlin
• Is Part Of: Materials science and technology. Volume 37:Issue 18(2021)
• Page Start: 1465
• Page End: 1475
• Publication Date: 2021-12-12
• Subjects: Hot working die steel -- homogenisation -- microstructure -- dendrite segregation -- microhardness; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2021.2015858
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : The dendrite structure and hardness of 4Cr5MoSiV1 ingot at different homogenisation processes were studied in order to identify the most efficient and cost-effective heat treatment for this steel. The microsegregation and microhardness were analysed after different soak-times at 800 or 1200°C for single-stage treatments, and for two-stage treatments of different soaking times at both these temperatures. At the single-stage homogenisation treatment, it would be expected that with the increasing of soaking times, the homogenisation effect becoming better, and the higher temperature soak especially so. However, the two-stage homogenisation treatments could be more effective than single-stage treatment at the higher temperature. The two-stage treatments 800°C/3 h + 1200°C/1 h have better homogenisation effect than 1200°C/4 h.