TY - JOUR N2 - Production processes of hot forging most often look similar [1-3]. Forging in several operations, usually in three or four. Most often the first operation is upsetting or flattening (sometimes rolling). The last operation is finishing forging. This applies to the production of steel forgings for the automotive, agricultural and other similar industries. Typical production proceeds as follows: the forgings are cleaned (shot-blasted) and then heat treatment is performed. It can be normalization, hardening and tempering, etc. After the heat treatment, forgings are checked and subjected to strength and microscopic tests, hardness tests, impact tests. The type of tests depends on the recipient. The process described in the work takes place in three operations. The heat treatment used so far is hardening and tempering. An attempt was made to change the heat treatment technology for a selected product made of 42CrMo4 steel (1.7225) (4140). An isothermal annealing test was carried out at different temperatures and for different times. The possibility of using heat from the forging process in heat treatment processes for the described product has been confirmed. L1 - http://www.czasopisma.pan.pl/Content/116080/PDF/AMM-2020-2-57-Zwierzchowski.pdf L2 - http://www.czasopisma.pan.pl/Content/116080 PY - 2020 IS - No 2 EP - 958 DO - 10.24425/amm.2020.132843 KW - AISI 4140 steel KW - isothermal annealing KW - forging KW - thermal treatment A1 - Zwierzchowski, M. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 65 DA - 2020.05.08 T1 - Analysis of the Possibilities of Using Forging Heat in Isothermal Annealing Processes for AISI 4140 Alloy SP - 951 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/116080 T2 - Archives of Metallurgy and Materials ER -