Powder alloy smithing float grease seal ring with upper and lower double-layer and method of producing the same

Abstract

The invention relates to a floating oil-seal ring which has an upper layer and a lower layer and is forged by powder alloy. The floating oil-seal ring comprises the upper layer and the lower layer, wherein the upper layer is made of rare alloy powder materials, and chemical compositions in weight percentage of the upper layer are as follows: 0.5 to 3 percent of Cu, 0.5 to 1 percent of C, 0.5 to 2percent of Cr, 0.5 to 1.5 percent of MoS2, and the balance being Fe; the lower layer is made of ordinary iron powder materials, and chemical compositions in weight percentage of the lower layer are as follows: 0.5 to 3 percent of Cu, 0.5 to 1 percent of C, and the balance being Fe; and the upper layer and the lower layer are sintered into an integrated floating oil-seal ring through pressing and high-temperature sintering. The upper layer of the floating oil-seal ring is made of high alloy powder, the lower layer is made of ordinary iron-based powder, and then the heat treatment process is performed, thereby assuring reasonable quenching depth as well as higher wear resistance and anti-fatigue performance; and the floating oil-seal ring has steady working performance, the service life is improved by 50 to 100 times, and the production cost is greatly reduced.

Description

【Technical field】 [0001] The invention belongs to the technical field of mechanical seals, and relates to an upper and lower double-layer powder alloy forged floating oil seal ring formed by pressing and high-temperature sintering with high-alloy powder as the upper layer and ordinary iron-based powder as the lower layer, and a preparation method thereof. 【Background technique】 [0002] The floating oil seal ring is a special type of mechanical seal. It is a compact mechanical seal device developed to adapt to the harsh working environment. It has strong anti-pollution ability, wear resistance, impact resistance, reliable operation, It has the advantages of automatic compensation after end face wear and simple structure, and is widely used in planetary reducers in the walking part of construction machinery. [0003] The existing floating oil seal ring is casted by a ferroalloy material or processed by 12CrNi3A after forging. When a piece of product wears to a certain extent...

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Problems solved by technology

[0003] The existing floating oil seal ring is cast by a ferroalloy material or processed by 12CrNi3A after forging. When a piece of product wears to a certain extent during use, the remaining alloy material will be unrecyclable waste; third, this type of product must be heat-treated and processed with high hardness, and brittle damage will easily occur during assembly or transportation

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