SU600207A1 - Tool steel - Google Patents

Description

2.0-3.5 Tungsten 1.0-3.0 Molybdenum 1.0-2.0 Vanadium 0.15-0.7 Nickel 1.0-5.0 Cobalt 0.04-0.12 Balance Iron Introduction In the composition of steel cobalt and nitrogen, the minimum ratio of carbon and alloying components provides a high resistance to smutiyu, hardness, hot hardness and redness, which chemical use of the steel tool, working with specific pressure 260-280 kg / mm. Silicon content in the range 2.1-2.9 wt. % ensures high processability and metallurgical conversion, the possibility of obtaining a given composition and physico-mechanical properties of industrial smelting metal. Example. Investigated the properties of the proposed steel and steel - the prototype of the following compositions (see table. 1). Table 1 of steel

Note. In all compositions, the sulfur content is 0.025%, phosphorus is 0.03%. The results of testing the steels are given in table. 2, 3 n 4. Shock viscosity, hardness in the annealed state and carbide non-uniformity of steels Shock viscosity (a), number

Shock viscosity, and „kgm / cm

Suggested Composition: 1 3

Prototype

Table 2 twists (n) and the maximum torque of the steels

Suggested Composition:

13

Prototype Note. Test deformed (g

Mechanical properties of experienced steels

Claims (2)

1. USSR author's certificate No. 358410, cl. C 22 C 38/34, 1970. 2. USSR author's certificate No. 521348, cl. C 22C 38/46, 1974. 45%) of the metal, longitudinal samples.