SU505729A1 - Sintered antifriction material - Google Patents

Description

(54) SINTERED ANTIFRICTION MATERIAL

I2

The known material can withstand a load of up to 150 kg / cm, and the proposed one works without noticeable wear to 400 kg / sl1.

Example. Manufacture of sintered antifriction material.

In the mixture of carbonyl nickel powder with 35 wt. % molybdenum introduced powder pore-forming - ammonium bicarbonate

(particle size 100 lx) in an amount of 10

weight. % Samples of this mixture of metal powders with a blowing agent are pressed to a porosity of 25%. Sintering is carried out at 1200 ° C iB for 2 hours and as a result a homogeneous nickel-molybdenum alloy is obtained. After sintering, samples with a porosity of 40% are obtained, which are impregnated at 800 ° C with a silver-based liquid alloy.

The latency and impregnation temperature of the Ni-Millbdenum antifriction material undergoes dispersion hardening, which leads to a significant increase in mechanical properties, to an increase in the carrying capacity and wear resistance of the antifriction material. The resulting antifriction material, consisting of a carrier base of Ni-35% Mo composition and solid lubricant, added in an amount of 40 wt. %, has a hardness of HB 200-220 kg / mm, a yield strength at compression of 70-75 kg / mm, a tensile strength at stretching 30-35 kg / mm.

Claims (1)

Invention Formula Sintered friction material containing nickel, silver, 1 zinc, cadmium and copper, characterized in that it additionally contains molybdenum 1 in the following ratio between the components (in wt.%) In order to increase the bearing capacity and wear resistance of apr. And work in vacuum: 15-28 12-20 5-8 8-13 5-8.5 Rest.