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- Comparasion with EN 10025 steel plate S355N and steel plate S355J0
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- How to choose pipe grades S235 S275 S355 from EN 10210 Specification
- How to choose steel grades from shipbuilding steel plate
- Introduction of Corten steel plate in different specifications
Heat treatment for steel plates,As rolled,Normalized or TMCP ?
Source:Xin Steel Industry Date:2015/10/22
Thermo-Mechanical Control Process (TMCP), is a controlled rolling processes. TMCP produces fine-grained steel by a combination of chemical composition and integrated controls of manufacturing processes from slab reheating to post-rolling cooling. There are 2 variations:-
1.Thermo-Mechanical Rolling (TMR):- fine grain size are produced by rolling in the recrystallization and the non-recrystallization regions of austenite, and sometimes in the dual-phase temperature region of austenite and ferrite.
2. Accelerated Cooling (AC):- steels meeting the specified requirements are produced by promoting grain refinement and increasing the pearlite and/or bainite volume fraction through controlled cooling (accelerated cooling and air cooling) immediately after the final controlled rolling (CR) or TMR operation.
AR- stands for as rolled condition.Plate are heated above the AC3 temperature range and rolled in continuation ( either in a single operation or multiple rolling cycles as required).Plates usually requires normalizing following rolling.Then we say AR-N.
Pleas see the schematics below, which clearly outlines different processes. TMCP steels may be produced either by TMR or AC process, both producing the similar steels with extremely high integrity.
