SU644560A1 - Method of producing stainless still strip for safety razor blades - Google Patents

Description

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This invention relates to the field of metallurgy, in particular to the production of cold rolled strip.

A known method of treating stainless steels is intended for the manufacture of cutting tools, which involves the deformation of steel at 850-1000 ° C, the subsequent cold deformation with smarmar compression up to 35% before each recrystallization annealing, which is carried out at temperatures not lower than 600 ° C and holding at this temperature not more than 1 min 1.

The disadvantage of this method is the need for multiple annealing during cold rolling (at least 6-7 times), which degrades the quality of the tape, especially the surface, and significantly increases the cost of production.

The thin belt annealing operation is carried out in through-flow furnaces with a protective atmosphere, which are very complicated and expensive units.

In order to increase plasticity, the proposed method is characterized in that the metal obtained by electroslag remelting is subjected to hot and cold deformation, and cold deformation (rolling) of the tape to an intermediate (pre-cleaning) thickness is carried out with total

2i

the reduction between annealing is 60-80%, and the cold deformation (rolling) on the final size - with a degree of reduction of 25- 35%.

The method is carried out as follows.

The metal is smelted in open main electric arc furnaces, casting into consumable electrodes; subjected to electroslag remelting; forging ingots on the press (hammers) or rolling on the mill at the slab; annealing and cleaning the slabs; hot rolling on the strip; annealing and pickling coils; cold rolling tape

the degree of reduction of 60-70%; annealing in the light annealing line; cold rolling on the tape with the degree of reduction of annealing in the line of light annealing and grinding (if necessary); cold rolling on the tape of the final size with the degree of reduction of 60-80%; annealing in the light annealing line; rolling on the final size with the degree of reduction of 25-35%. The proposed method allows to obtain a metal structure in the finished tape with uniformly distributed fine (µm) carbides, which ensures high quality of the cutting edge of the product; 2-3 times to reduce the number of intermediate

heat treatments (annealing), which is essential

improves the surface quality of the tape; reduce the labor intensity of production.

Claims (1)

Invention Formula The method of producing stainless steel razor blades for safety razors, including electroslag remelting of metal, hot rolling and cold rolling with alternate annealing, is different from the fact that, in order to increase ductility, cold rolling to the pre-finishing size is carried out with the total degree of reduction is 60-80%, and rolling to the final size - with the degree of reduction 25-35%. Sources of information taken into account during the examination 1. PSSHR patent No. 126600, cl. 7a 1/22, 1974.