SU1006537A1 - Composition for casehardening products - Google Patents

Abstract

COMPOSITION FOR CHEMICAL-THERMAL TREATMENT OF PRODUCTS, mainly from titanium and its alloys, containing amorphous boron and a halogen-containing activator, which also contains aluminum powder in order to increase the abrasive resistance of the processed products tantalum powder, and as a halogen-containing activator - magnesium fluoride in the following ratio, wt.%: 2-9 Aluminum powder 0.1-3 Tantalum powder 2-8 magnesium fluoride Residue Amorphous boron (L s

Description

ate with

The invention relates to iron ore and is associated with a process of chemical heat treatment, in particular with complex incapacitation in porous mixtures of titanium alloys.

The composition of the powder mixture for boronization of titanium and its alloys is known. A mixture consisting of 84% boron carbide and 16% borax, when processed at pro and 1200 ° C for b and 8 h, forms, respectively, porous layers with a thickness of 7 and 8 µm til.

The closest in technical essence and effect achieved is a composition containing amorphous boron and 3% 2.

Along with the great advantages of boride coatings in comparison with other types of CTO (high wear resistance under conditions of abrasive wear and serviceability at elevated temperatures and in aggressive media), they have specific brittleness, which negatively affects their operational properties.

The purpose of the invention is to increase the abrasive resistance of the processed products.,

The performance of coatings will increase with an increase in their ductility. I1 I Ta IB MgFg Layer depth,. I

Mixture ... J ... 1

92

combined with high strength. This should ensure high adherence of the coating to the substrate material.

This goal is achieved by the fact that the composition of saturating 1 .; mixtures containing amorphous boron (grade 1, GUUOGHP-G8-58) and halogen-containing activator, additionally introduced aluminum powder brand PAK-3 GOST 549450) and tantalum powder, and magnesium fluoride (HDA, GOST 7204-52) as a halogen-containing activator. ) while the content of all specified components should be in the following correlation, wt.% :. .

Aluminum powder Tantalum powder Magnesium fluoride. Amorphous boron.

For example. The process of complex, saturation is carried out in conventional hermetic containers with a fusible closure on samples from. titanium alloy VTZ-1 and OT-4 mode: 930 ° C - 6 h.

Data processing is given in Table. one.-

.Table 1

Surface hardness, kg / mm 2

1800

25

Comparative results of wear testing of samples of titanium alloy VTZ-1 after processing

in the known and proposed composition of the grinding. the skin is given in table. 2

Table 2

Claims (1)

COMPOSITION FOR CHEMICAL AND THERMAL PROCESSING OF PRODUCTS, mainly from titanium and its alloys, containing amorphous boron and a halogen-containing activator, characterized in that, in order to increase the abrasion resistance of the processed products, it additionally contains aluminum powder and tantalum powder, and as a halogen-containing activator - magnesium fluoride in the following ratio of components, wt.%: Aluminum powder 2-9 Tantalum Powder 0.1-3 Magnesium Fluoride 2-8 Amorphous boron. The rest is ω and after FO m