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Material and process engineering applying to casting and rolling of long products in engineering steel grades
Author(s) -
Kremer KarlJosef,
Rakoski Fritz
Publication year - 1993
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199301041
Subject(s) - ductility (earth science) , metallurgy , materials science , die (integrated circuit) , microstructure , cracking , dilatometer , ultimate tensile strength , mechanical engineering , casting , composite material , engineering , creep , thermal expansion
Increasing demands on the properties, faultlessness and economic efficiency of long products in engineering steel grades require extensive material and process engineering. Modern tools for material research, e.g. laboratory simulation techniques process‐modelling, can be applied to develop process parameters related to the material behaviour. This is shown by means of three examples. High‐temperature‐ductility is determined by hot tensile tests after partial remelting of the samples. Hot cracking during continuous casting can be reduced if process conditions, which minimize the stress in the strand shell, in the temperature ranges with reduced material ductility or if the chemical composition of a steel is improved to reduce its susceptibility to hot cracking. Segregations in concast‐blooms and bars are analyzed by computer‐controlled microprobes. The influence of segregations on the microstructure and properties of bars can be minimized by suitable heating up of the material. Adequate parameters for normalizing rolling of quenched and tempered steels can be developed by dilatometer simulation.