Influence of treatment conditions on the mechanical properties of wheels produced from continuous-cast billet and ingots and hardened by rolling heat

Autor: A. S. Grinshpon, I. A. Sedyshev, V. A. Tarasova, A. M. Volkov, A. A. Yandimirov
Rok vydání: 2008
Předmět:
Zdroj: Steel in Translation. 38:688-693
ISSN: 1935-0988
0967-0912
Popis: It is important to establish the quality of wheels made from continuous cast vacuum-treated steel billet and hardened by the rolling heat, for a number of reasons: this is a very energy-intensive process, with heat treatment of the billet and wheels in furnaces of four types (heating before deformation, isothermal holding, heating before quenching, and tempering); wheel production from open-hearth ingots is wasteful; and the surface quality of the ingots is poor, so that repair and rejection rates for wheels on account of surface defects are very high. In industrial experiments, the mechanical properties of wheels made from continuous-cast billet and hardened by the rolling heat may be determined. The billet (diameter 410 mm) is made from Czech R7 and R9 steel and is compared with steel 60 ingots (Table 1). The influence of the deformation conditions of the billet in 20- and 100-MN presses (in particular, the duration of the interval between shaping operations and also three-pass deformation in shaping) on the mechanical properties in the wheel is investigated.
Databáze: OpenAIRE
Externí odkaz: