SU1280031A1 - Method of manufacturing cold-hardened band from austenitic stainless steel - Google Patents

Abstract

The invention relates to rolling production, in particular to the manufacture of hard-rolled tapes and strips of austenitic stainless steel. The purpose of the invention is to obtain the required mechanical properties. After cold rolling to an intermediate size, heat treatment and hardening are carried out with a relative reduction value, which is determined as a 1/1 dependence.

Description

one

The invention relates to rolling production, in particular to the manufacture of hard-rolled tape and strip of stainless steel type 08-12X18H10T.

The aim of the invention is to obtain the required mechanical properties.

An experimental fractional smelting of steel 08X18H10T with a bare chromium and nickel content was melted:

Cr fraction 17.3

about

fraction 17.9 fraction 18.7

Ni 10.9 10.1

9.1

The content of the remaining elements in the steel is as follows: C 008, Si 004, Mn 1.21, Cr 17-19, Ni 9-11, S 0.016, P 0.027, Ti 0.52.

Ingots weighing 20 kg were rolled into strips with a section of 40x80 mm, which, after being cut to a length of 120 mm and surface stripping, were rolled into a hot rolled 3.5 mm thickness rolled on an experimental 250 / 105x350 mill.

A hot-rolled strip of 0.8 mm thick was made of hot-rolled rolled steel 3.5 mm thick.

According to

one

(.T 1 40000-C

For the treatment according to the proposed method, the required degree of deformation during the stand-up was determined. The required degree of deformation according to the prototype, the type was 20% for half-finished tape (PN), 28 and 35% for tape (H), and 41% for specially loaded tape (OH).

Starting from the required degree of deformation when the steel was hardened, h was divided according to t-p

five

280031;

(where h | is the required thickness of the attached tape, equal to 0.8 mm) the intermediate thickness of the rolled strip h. Then, the hot rolled strips were cold rolled to intermediate thicknesses according to the calculation. After cold rolling, the samples were heat treated — annealed in a furnace with a protective atmosphere at 900, 1100 and (in order to check the entire temperature range of annealing adopted for this steel) and subjected to heat treatment with intermediate thicknesses of 0.8 mm.

Tests of tensile tests to determine the mechanical properties of the carbonized tape were carried out on a D 10/90 tensile testing machine (GDR) with a stretching rate of 9.5 m / min.

The test results are shown in the table.

As can be seen from the table, the use of the invention in comparison with the prototype provides obtaining guaranteed mechanical characteristics of the unpacked tape for all three types of unloading.

Claims (1)

The invention relates to rolling production, in particular to the manufacture of hard-rolled tapes and strips of austenitic stainless steel of type 08-12X18H10T. The aim of the invention is to obtain the required mechanical properties. An experimental fractional melting of 08Kh18N10T steel with a chromium and nickel content of Cr 1 was fractionally 17.3 2- fraction 17.9 .3- fraction 18.7 The content of the remaining elements in steel was as follows: C 008, Si 00 Mp 1, 21, Cr 17-19, Ni 9-11, S 0.0 P 0.027, Ti 0.52. Ingots weighing 20 kg were rolled into strips with a section of 40x80 mm, after being cut to a length of 120 mm and surface stripping rolled into a hot rolled 3.5 mm thickness rolled to an experimental industrial mill 250 / 105x350. A hot-rolled strip with a thickness of 3.5 mm was used to make a hard-rolled tape with a thickness of 0.8 mm. According to dependencies (.T 1 40000-Cg for the treatment according to the proposed method, the required degree of deformation during loading was determined. The required degree of deformation according to the prototype, the type was 20% for semi-packed tape (PN), 28 and 35% for heated tape (H) , for a specially hardened tape (OH) 41%. Based on the required degree of deformation during the steel hardening, h was divided according to Tp1; (where h | is the required thickness of the hardened tape, equal to 0.8 mm) h. Then, cold rolling of hot rolled strips was carried out on the After cold rolling, the samples were heat treated - annealed in a furnace with a protective atmosphere at 900, 1100 and (in order to check the entire temperature range of annealing adopted for this steel) and were subjected to an intermediate thickness of 0.8 mm. Tests of tensile tests to determine the mechanical properties of the carbonized tape were carried out on a D 10/90 tensile testing machine (GDR) with a stretching rate of 9.5 m / min. The test results are shown in the table. As can be seen from the table, the use of the invention in comparison with the prototype provides obtaining guaranteed mechanical characteristics of the unpacked tape for all three types of unloading. The invention of the method for producing a packaged tape of austenitic stainless steel, including cold rolling to an intermediate size, annealing and loading, characterized in that, in order to guarantee the required mechanical properties, the loading is performed depending on the chromium and nickel content in the steel and the annealing temperature with the value of relative reduction determined by dependence (Jie .... i: .I 40000 C is the base of the natural logarithm; Ni is the content of chromium and nickel in steel, respectively,%; - temperature from Gigag, E required tensile strength, kgf / mm-. E- 01 . and n Е- О f- Ш Ю Е О О 0) . Pq  EH and EH f PQ E- O O but 0) " and WITH oh oh EH F. m EESH about , E-1 O1 m Bp about E- O O E-1 01 m t- about and about f X g to 00 OS oo ( cho o o STCH about I I tt o ff S about. Cd m go go t " tH CN | t D1 6 n) her K X b to " H S I f EH about oh about eg about in about } SoSd CN CN 00 choE; at 4) o) o3 ABOUT) pqasSEN H oh oh oh oh about oh oh oh oh vO PTS about och Och about go "N 00 g - CTi U-1 about § 2 r st from - about YU from cm gotsm see what ON 00 CN) go go oo go 1L go oo in go go Gch | CN year with about oh oh about § about oh oh oh oh about oh oh ate oh oh what cho Och Och 91 about about g go p oo g about E about D, e, about s with .f