Aluminum tin 40 copper-steel metal bearing material and production method thereof

Abstract

The invention discloses an aluminum tin 40 copper-steel metal bearing material and a production method thereof. The production method comprises that (1) aluminum tin 40 copper alloy ingots of which two surfaces are roughened and a pure aluminum layer are subjected to the dual-surface composite rolling, the cold rolling is conducted sequentially till the target thickness is reached, the aluminum tin 40 copper alloy ingots are obtained through horizontal continuous casting, the processing rate of the dual-surface composite rolling is more than 50% and the processing rate per cold rolling is in a range from 20% to 35%; and (2) steel plates of which two surfaces are roughened and the aluminum tin 40 copper alloy after being burnished in the (1) are subjected to the composite rolling and the annealing is conducted for 8-10 hours at the temperature of 280 DEG C+ / -10 DEG C. The material has good seizure resistance, adaptability and high-temperature properties and is suitable to diesel engine bearing of medium and low speed ships.

Description

technical field [0001] The invention relates to an aluminum tin 40 copper-steel metal bearing material and a manufacturing method thereof. Background technique [0002] Aluminum tin 40 copper-steel metal bearing material is especially suitable for the main bearing bush and connecting rod bearing bush of marine medium and low speed diesel engine, which can improve the performance of diesel engine and prolong its service life. There is no domestic production, and all the materials needed need to be imported. Moreover, in the prior art, when Al-Sn-40-Cu alloy is cast in a conventional iron mold, the segregation of tin is larger than that of 20 high-Sn alloy, and pores are prone to occur, which is difficult to eliminate in subsequent rolling and annealing processes, which will affect the quality of the material. Mechanical properties, and air bubbles often appear between the aluminum-tin 40 copper alloy and the pure aluminum layer due to weak bonding, resulting in a decrease in...

AI Technical Summary

Problems solved by technology

There is no domestic production, all the materials needed need to be imported

Moreover, in the prior art, when Al-Sn-40-Cu alloy is cast in a conventional iron mold, the segregation of tin is larger than that of 20 high-Sn alloy, and pores are prone to occur, which is difficult to eliminate in subsequent rolling and annealing processes, which will affect the quality of the material. Mechanical properties, and bubbles often appear between the Al-Sn 40 copper alloy and the pure aluminum layer due to weak bonding, resulting in a decrease in the yield of the alloy and an increase in production costs

In addition, the annealing temperature of aluminum tin 40 copper and steel is relatively high, and it is difficult to obtain an ideal metallographic structure.