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PROCESS TECHNOLOGY FOR PRODUCTION OF SEMI PROCESSED ELECTRICAL STEEL WITH CORE LOSS VALUE OF 4.5 WATT/KG (MAX)
PROCESS TECHNOLOGY FOR PRODUCTION OF SEMI PROCESSED ELECTRICAL STEEL WITH CORE LOSS VALUE OF 4.5 WATT/KG (MAX)
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机译：半损耗电工值为4.5 WATT / KG（最大）的半加工电工钢的生产工艺技术
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摘要
This invention relates to a process for the production of semi-processed electrical steel, which comprise the following steps: (A) Preparing a steel composition in a LD converter having the following specific alloy chemistry. (a) %C: 0.040 max. (b) %Mn: 0.25-0.45 (c) %P: 0.20 max. (d) %S: 0.006 max. (e) %Si: 0.5-0.70 (f) %AI: 0.80-0.10 (B) Subjecting the above steel to Vacuum Arc Refining (VAR) and Argon rinsing so as to achieve a nitrogen level in the steel of less than 80 ppm and sulphur less than 0.006%; (C) Casting the steel of step 2 into slabs of desired shapes and sizes at a casting speed ranging between 0.7 to 0.8 meter per minute in the hot condition and; (D) Rolling the so achieved slabs into hot bands of less than 2.7 mm thickness followed by finish rolling and cooling the said bands. (E) Pickling of hat bands in HCI medium followed by cold rolling of hot bends to 0.53 ±0.1 mm thickness (F) Annealing of cold rolled coils through either batch step or as a continuous process with designed annealing parameters (G) Temper rolling of annealed coils with 2-3% reduction (H) Decarburization annealing of stamped sheets with designed annealing parameters
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