TY - JOUR AU1 - Pachurin, G. AU2 - Filippov, A. AB - ISSN 0967-0912, Steel in Translation, 2008, Vol. 38, No. 7, pp. 522–524. © Allerton Press, Inc., 2008. Original Russian Text © G.V. Pachurin, A.A. Filippov, 2008, published in “Izvestiya VUZ. Chernaya Metallurgiya,” 2008, No. 7, pp. 23–25. Rational Reduction of Hot-Rolled 40X Steel before Cold Upsetting G. V. Pachurin and A. A. Filippov Nizhni Novgorod State Technical University Received January 9, 2008 DOI: 10.3103/S096709120807005X The efficiency of metal-fastener production may be Usually, the intermediate heat treatment is annealing, improved by reducing the number of operations after which there should be no large deposits of free fer- required. rite in the microstructure, since the fast cold working rules out large reduction. Large deposits of free ferrite We may identify two stages in the production of may appear in the microstructure of the annealed prod- metal fasteners: uct if the heating or cooling conditions are disrupted. (1) preparation of the rolled product (bar); A promising trend in the production of high- (2) manufacture of the fastener by cold upsetting strength fasteners is the preparation of bar with and heat treatment. mechanical and plastic properties such that upsetting Adjustment of the parameters in these stages will yields material of strength class 8.8 TI - Rational reduction of hot-rolled 40X steel before cold upsetting JF - Steel in Translation DO - 10.3103/S096709120807005X DA - 2008-10-21 UR - https://www.deepdyve.com/lp/springer-journals/rational-reduction-of-hot-rolled-40x-steel-before-cold-upsetting-jCN9STfYVu SP - 522 EP - 524 VL - 38 IS - 7 DP - DeepDyve ER -