SU901348A1 - Composition for boron-copper plating of steel articles - Google Patents

Description

(5) COMPOSITION FOR THE STORAGE OF PRODUCT OF STEEL PRODUCTS

one

The invention relates to chemical heat treatment and can be used to increase the wear resistance of products from iron-based alloys.

Known composition 1 for borax containing the following components,%:

Boron carbide

95

Aluminum oxide

2.5

2.5

Aluminum chloride

2.4 from weight

However, when saturated from the indicated composition, it is necessary to use heat-resistant hermetic containers, which reduces the manufacturability of the mixture. The use of ammonium chloride as an activator in combination with boron carbide and copper does not allow for a high level of formation of a boron-deposited layer.

The closest to the proposal is a composition for boraxing, which contains the following components,%:

Boron carbide3-6

Sodium fluoride Iron Dross This composition allows boron deposition to be carried out in coatings without protective

10 snap f2,

However, the presence in the composition of powdered copper in the free state makes it difficult for the diffusion saturation of two elements simultaneously — boron and copper

"5 in the steel surface. In this case, the rate of formation of boron depleted layers is reduced.

The aim of the invention is to increase the saturability of the composition,

20 which provides an increase in the rate of formation of boron-deposited layers.

Claims (2)

This goal is achieved in that the composition containing boron carbide. 390 sodium fluoride and copper saturating substance, contains copper oxide as the copper-saturated substance in the following ratio of components, wt,% Boron carbide Sodium fluoride 2-10 Copper oxide The presence of copper oxides in the composition as a copper-containing component allows to obtain active copper atoms due to chemical reactions between the components of the mixture. At the same time, conditions are created for the god of a favorable course of the processes of adsorption and diffusion of copper and boron atoms into the first surface, which increases the saturation of the mixture. The proposed composition allows the process of boromineering in a conventional furnace air environment without special protective equipment. Pr and f-T e p. The diffusion saturation of steel samples is carried out in 5 sizes of 10 X 10 X 10 mm. Samples sprinkled with powder mixtures and so that the layer of saturating mixture was not less than 5-6 mm, and placed in an electric furnace. Components with a fraction size of 0.05-0.20 mm are used to prepare the mixtures. Diffusion boron sedimentation is carried out for k h at. Data processing is presented in the table on the proposed its10it5 155 65233163 4 - Continuation of the table composition ,. %: boron carbide 55; copper 5; sodium fluoride 5; dross 35. As can be seen from the table, the rate of formation of boron-containing layers of the proposed compositions is 1.2-1.3 times higher than in the case of saturation of a known composition. Claims for boron-reducing steel products, containing boron carbide, sodium fluoride and copper saturating agent, characterized in that, in order to increase its saturability, it contains copper oxide as a copper-saturated substance in the following ratio of components; Boron carbide 45-65 Sodium fluoride 2-10 Oxide of copper25- 5 Sources of information taken into account during the examination 1. Physico-chemical mechanics of materials, 1976, K 2, p. 69-72. 2. USSR author's certificate W 865716, cl. C 23 .C 9/04, 1979