| 摘要 |
FIELD: polymers. ^ SUBSTANCE: invention relates to polymeric composition self-lubricating materials designated for making friction unit articles working in absence of lubricant or its limiting under conditions of dust content and effect of transient loadings. Antifriction composition comprises polytetrafluoroethylene, graphite and crushed quartz with dispersity 40-60 mcm as a silicate-containing additive and, additionally, bronze powder and chalk and components are taken in the following ratio, wt.-%: crushed quartz, 0.4-0.8; graphite, 3-8; chalk, 5-12; bronze powder, 15-25, and polytetrafluoroethylene, the balance. Invention provides enhancing wear resistance and heat stability of antifriction composition and simplifying its preparing. ^ EFFECT: improved and valuable properties of composition. ^ 2 tbl, 7 ex |
