SU670632A1 - Steel for dies - Google Patents

Description

(54) STAMP STEEL 0.4-1.2 Nikel l P8019 and, oo, Zirconium 0.06-0.12 0.06-0.12 Niobium Aluminum, 65 Else Steel contain sulfur as impurities | And f | Osphor not more than 0.04 wt. % of each. CyiMMapiHoe with tungsten and mol1I | bdbna must be no more than 3.5 wt. %, which creates the best conditions for the formation of titanium, zirconium, niobium and aluminum dithrides. Zirconium and niobium are interchangeable, and their total content does not exceed 0.2 weight. % The content of titanium, zirconium, niobium, and AlU1M, should correspond to the following ratio of chambers: no1H & B, iB-ec. %: 10 15 20 titanium - f sharconc + uio. Bi, 0, aluminum that it is necessary to have in the layer a large coP. Of aluminum and aluminum. v; Such content of alloying elements in the proposed steel provides high technical strength, plasticity and impact (VISCOSITY, but it gives the most favorable complex of diffusive layers on an extruded tool, and also to use it for some components of the cutting tool, obtained by extrusion subsequent chemical and thermal about, processing. The steel is smelted in the ONE induction furnace according to the generally accepted technology using the widely used charge materials. The aggregable steels are listed in Table 1. Table 1

The mechanical properties of the proposed (N ° N ° 1-4) and known (No. 5) steels after annealing, forging and final heat treatment according to the following conditions: quenching from temperature in the layer; double tempering at temperatures of 600 and 560 ° С with an exposure time of 1.5 hours at each temperature is given in Table. 2

table 2

Surface solid state, heat resistance of samples nitrided according to the mode: - 12 hours, ammonia dissociation time 45–55%, 2 h diazotization at 540 ° C, shown in Table. 3

Table 3

In tab. Figure 4 shows the technological plasticity of the investigated steels, determined under severe conditions of destruction of the specimens by three twisting.

Table 4

As seen from the data presented, the technological plasticity of the proposed steel is significantly higher than that of the known.

This is especially important when lowering

TeMHDpaTiypaiX is heated, which makes it possible to obtain a tool / ment for the proposed steel by means of Metal Forming by pressure, for example by extrusion. In this case, a high quality of the obtained instrument is achieved without a deep decarburized layer and scale.

Formula 3 about b | rete n i

Stamped steel containing carbon, manganese, crepium, chromium, tungsten, molybD6H, vanadium, nickel, titanium, zirconium, niobium, aluminum and iron, characterized in that, in order to increase technological plasticity, it contains a component in the following ratio, weight . %: Carbon 0.36-0.42

Manganese 0.2-0.5

Silicon0.4-0.8

Chrome 2.0-2.8

Tungsten1,6-2,6

Molybdenum1.0-1.6

Vanadium 0.4-1.0

Nickel0.4-1.2

0.08-0.12 0.06-0.12 0.06-0.12 0.2-0.6 Else

Sources of information,), taken into account for the examination

1. Authors certificate of USSR L 387023, cl. 22C, 38/28, 1973.

2. For 2446690, cl. C 22C 3850, 01.29.77, according to which a decision was made to issue an author's certificate.