SU448251A1 - Composition for molybdenum sili cation - Google Patents

Description

The invention of ognosigs to the cloud of chemical heat treatment, in particular, to the processes of complex saturation of the surface of megals.

A composition for molybdenum silication is known, containing sodium molybdenate with the addition of silicocalcium powder.

The proposed composition for molybdenum silication differs from the known one in that it additionally contains molybdenum oxide and aluminum powders, as well as ammonium chloride in the following ratio of components:

Molybdenum oxide 20-25

Silikokaltsy 25-30

Ammonium chloride 2-3 from

weight of the charge

Alumina Rest.

The inscribed powder mixture provides, in comparison with the known melt, an increase in the technological efficiency and a decrease in the reactivity ratio of the saturation,

Diffusion saturation in the proposed mixture is carried out at a temperature of 900-11 ° C for 1-6 hours, depending on the required depth of the layer,

For example, at saturation in the specified mixture of samples from the titanium alloy BT-i and steel 45 in 1 hour at iIOO ° C, layers are obtained:. on BT-I with a thickness of 130 microns and a hardness of 1000-1050 kg / mm 2-, on steel 45 with a thickness of 220 microns, with a hardness of IOOO-I050 kg / mm.

Molybdenum silicating is an effective way to increase heat resistance and wear resistance of parts.

SUBJECT OF INVENTION-i

A composition for molybdenum silication, containing silicocalcium powder, characterized by

so that, in order to increase those. friendliness and cost reduction

24482514

DIFFUSION process, he added- molybdenum oxide20-25

Nygolno contains powders of siliococalcium25-30

molybdenum, chlorine ammonium and chlorine ammonium 2-3 from

alumina at the next co-weight batch

with respect to components,%:. Alumina Rest