Steel-based iron-nickel alloy diffused-type solid self-lubricating bearing and manufacturing method thereof

Abstract

The invention discloses a steel-based iron-nickel alloy diffused-type solid self-lubricating bearing and a manufacturing method thereof. The steel-based iron-nickel alloy diffused-type solid self-lubricating bearing is shaft sleeve-shaped; the exterior of the shaft sleeve is a steel jacket; and the inner wall of the shaft sleeve is a wear-resistant layer formed by compacting and sintering iron-nickel alloy mixed powder. The steel-based iron-nickel alloy diffused-type solid self-lubricating bearing is characterized in that the iron-nickel alloy mixed powder comprises 15-20% of nickel, 35-40% of iron, 5-8% of tin, 0.5-1.0% of titanium powder, 1-4% of molybdenum sulfide, 1-3% of aluminum oxide, 1-4% of graphite, 1-2% of zinc stearate and the balance of copper by weight. The manufacturing method of the self-lubricating bearing comprises the following steps of: manufacturing a wear-resistant blank, i.e. blending and stirring the raw materials and carrying out compression molding; manufacturing the steel jacket; and manufacturing the steel-based iron-nickel alloy diffused-type solid self-lubricating bearing, i.e. placing the wear-resistant blank in the steel jacket for vacuum sintering, and carrying out vacuum oil absorption, fine manufacturing and secondary vacuum oil absorption to obtain a finished product. The steel-based iron-nickel alloy diffused-type solid self-lubricating bearing has the characteristics of strong impact resistance, high carrying capacity, wear resistance, low friction coefficients, corrosion resistance and self-lubrication.

Description

[0001] technical field [0002] The invention relates to a self-lubricating bearing of a new material, in particular to a steel-based iron-nickel alloy dispersion type solid self-lubricating bearing and a manufacturing method thereof. Background technique [0003] In excavator body connecting bushings, hydraulic cylinder bushings, construction machinery, heavy industrial equipment connecting bushings, in loaders, forklifts, cranes, as well as injection molding machinery, die-casting machine Green columns, crosshead guide bushings, industrial machinery robots, As well as the bearings used in various stamping and plastic mold guide sleeves, these bearings require high load-bearing capacity, dust resistance, corrosion resistance, impact resistance, good thermal conductivity, and can work normally in a wide temperature range , suitable for reciprocating, rotating and oscillating parts that are frequently started and difficult to form an oil film; and need to have a very low wea...

AI Technical Summary

Problems solved by technology

At present, the bushing with high-strength brass alloy bushing as the base is widely used, and then holes are drilled around the bushing, and graphite particles are embedded in the holes to form a self-lubricating bearing. This kind of self-lubricating bearing is called in the industry. JDB bearings have the disadvantages of high material cost, complicated manufacturing process, and low production efficiency. Due to the existence of graphite holes, the mechanical strength of the bearing is reduced, resulting in poor impact resistance and other shortcomings. In addition, there are blind spots in the arrangement of graphite particles, resulting in boundaries. Insufficient

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