SU1036791A1 - Wear resistant stell - Google Patents

Abstract

WEAR RESISTANT STEEL, containing carbon, silicon, manganese. titanium, zirconium, nitrogen and iron, about t and h a y sh a so that, in order to improve wear resistance and crack resistance, it additionally contains vanadium, molybdenum and boron at the following ratio of components, wt.% Carbon 1.0 -1.4 Silicon 0.5-1.0 Manganese 11-14, 0.2-0.8 Titanium 0.1-0.4 Zirconium - 0.1-0.4 Nitrogen Vanadium 0.1-0.8 0.1-0.5 Molybdenum Bor 0.05-0.1 g Iron Rest (L

Description

09

but

CD The invention relates to metal, in particular, high-manganese steel for manufacturing parts operating under abrasive wear conditions. High-manganese steel 1 is known, additionally alloyed on titanium, vanadium, with the aim of producing dispersed phases on an austenitic basis, of the following chemical composition, weight,%: 1-1.5 Carbon 11.5-15 Manganese 0.3-1 Silicon 0 , 05-0.1 0.03-0.05 0.05-0.25 Vanadium Elk Kelsezo However, the introduction of carbon into the steel is highly active towards carbon and the nature of the kerbides, their dispersion and distribution drastically change the carbon content in the matrix , they embrittle steel, reducing its plasticity and manufacturability. The closest to the described invention to the technical essence and the achieved result is steel 2 .1 of the following chemical composition, 5 wt.%: Carbon 1.0-1.4 Silicon 0.5-1.0 Manganese 11-14 Titan 0.2-0-0, 8 Zirconium 0.1-0.4 Nitrogen 0.1-0.4 Iron Other The disadvantage of the well-known steel is low wear resistance and crack resistance during casting. The aim of the invention is to increase wear resistance and crack resistance. This goal is achieved by the fact that steel containing carbon, silicon, manganese, titanium, zirconium, nitrogen and iron additionally contains vanadium, molybdenum and boron with the following ratio of components, wt.%: Carbon 1.0-1.4 0.5- 1,0jO Silicon Manganese Titanium 0.2-0.8 0.1-0.4 Zirconium 0.1-0.4 0.1-0.8 Vanadium 0.1-0.5 1 Molybdenum 0.05-0 , 1 Rest Iron The introduction of molybdenum into steel contributes to the suppression of the development of diffusion processes, stabilizes the release of secondary phases and contributes to the formation of dispersed precipitates evenly distributed throughout the matrix. The content of molybdenum in the steel less than 0.1% does not affect the grinding and the location of the released carbides and carbonitrides. The introduction of molybdenum into steel above 0.5% is impractical, since there is no increase in wear resistance and crack resistance during casting. The introduction of vanadium into steel in the presence of nitrogen promotes the formation of dispersed vanadium carbonitrides during the crystallization of the alloy. The introduction of vanadium into the alloy of less than 0.1% does not cause changes in the properties of the alloy, since vanadium carbonitrides either do not form or are formed in very small amounts. The presence of vanadium in the alloy above 0.8% leads to carbon depletion of the alloy and dramatically changes the morphology of titanium and zirconium carbonides, which reduces the ductility and wear resistance of the alloy. The introduction of boron into the alloy facilitates the formation of borides, a very chemically resistant and extremely hard compound that is inert to the matrix, thereby increasing the wear resistance of the alloy. The content of the steel selection of less than 0.05% does not affect the wear resistance of the alloy and the ratio of the dispersed inclusions formed. A boron content above 0.10% causes formation of boron carbonitride, a very brittle chemical compound that drastically reduces the ductility and wear resistance of the alloy. The chemical composition, wear resistance and crack resistance of the described and known steels are given in the table.

1036791

Abrasive wear is determined on a small thermal knot of a crack of 6 mm. The APC-1 friction clearance, impact-abrasive pouring temperature, 1450s. wear - on wrench hammer Use of the described steel

LVMD crusher with a flow rate of 1.5 tons / chdl casting, for example

size of 20 mm with the definition of a grinding mill, will increase their

The weight is 5–10–15 hours, and the crack resistance –––––––––––––––– of

Claims (1)

WEAR-RESISTANT STEEL containing carbon, silicon, manganese, titanium, zirconium, nitrogen and iron; and crack resistance, it additionally contains vanadium, molybdenum and boron in the following ratio of components, wt.% Carbon 1.0-1.4 Silicon 0.5-1.0 Manganese 11-14. Titanium 0.2-0.8 Zirconium 0.1-0.4 Nitrogen 0.1-0.4 Vanadium 0.1-0.8 Molybdenum 0.1-0.5 Boron 0.05-0.1 ABOUT Iron Rest _t 3 ω from "*