Experimental Research for the Establishment of the Optimal Forging and Heat Treatment Technical Parameters for Special Purpose Forged Semi-Finishes

Nicolae Constantin; Adrian Ioana; Valentina Caloian; Valeriu Rucai; Cristian Dobrescu; Alexandra Istrate; Vili Pasare

doi:10.3390/ma16062432

Experimental Research for the Establishment of the Optimal Forging and Heat Treatment Technical Parameters for Special Purpose Forged Semi-Finishes

Materials (Basel). 2023 Mar 18;16(6):2432. doi: 10.3390/ma16062432.

Authors

Nicolae Constantin¹, Adrian Ioana², Valentina Caloian¹, Valeriu Rucai¹, Cristian Dobrescu¹, Alexandra Istrate¹, Vili Pasare²

Affiliations

¹ Materials Science and Engineering Faculty, University Politehnica of Bucharest, 060042 Bucharest, Romania.
² Engineering and Management of Metallic Materials Obtaining Department, Science and Engineering Materials Faculty, University Politehnica of Bucharest, 060042 Bucharest, Romania.

Abstract

The authors present in this paper the experimental results and conclusions obtained after conducting a comparative study on three samples of forged semi-finished products from the steel brands 10CrMo9-10, 25CrMo4, and 42CrMo4. These are common heat-resistant alloy steels used in various industries nationally and internationally. This study aimed to test under the same identical experimental conditions of forging and heat treatment of three samples made of three different brands of steels 10CrMo9-10, 25CrMo4, and 42CrMo4. Analyzing the experimental results obtained, it can be seen for which of the three brands of tested steels the best forging and heat treatment parameters are obtained. Following experimental research, the best material was determined by analyzing the results obtained for the mechanical characteristics (tensile tests according to DNVGL-RP0034-SFC2 and NACE MR0175-hardness 207-235 HBW) and austenitic grain size. The authors determined that among the three types of steels analyzed, 10CrMo9-10 best meets the imposed requirements. This statement is in view of the comparative analysis of the results of experimental research.

Keywords: forging; heat treatment; plasticity; resilience; steel; tempering.

Grants and funding

This work was supported by Programul Operational Capital Uman, Axa prioritară 6—Educatieș competente, Proiect: Pregătirea doctoranzilor si cercetătorilor postdoctorat în vederea dobândirii de competente de cercetare aplicativă—SMART Cod MySMIS: 153734, and the authors would want to thank University “Politechnica” of Bucharest for the chance to publish this paper.