Cylinder block made from wearable aluminum alloy and manufacturing technique

Abstract

This invention discloses an abrasion Al arroy cylinder and its manufacture technology, which chemical composition in weights is Si 7.6-8.3% Cu2.5-3.5% 0.3-0.5%Mg, Mn 0.2-0.4%, rest is Al. The technology is that the Al alloy raw material matched in terms of the above mentioned proportion is smelted in a thermal insulation furnace, refined, gas cleaned-up and modificated with dust refinery agent and the solution temperature is monitored by a dogmatic thermometer via a thermal coupler, then an alloy iron cast cylindrical jacket is put on the position of its mold to pour the solution onto the mold cavity to be casted with low pressure casting so as to integrate the jacket with the solution finally it is finished by the process center.

Description

1. Technical field [0001] The invention relates to an aluminum alloy cylinder body for a gasoline engine and a manufacturing process thereof. 2. Background technology [0002] Existing gasoline engine aluminum alloy cylinder block adopts aluminum alloy ADC12 (brand) material to carry out high pressure casting and form. This manufacturing process requires high equipment cost, and the internal structure of the produced cylinder block is not dense, with many pores and poor air tightness. All castings need to be subjected to the subsequent process of "impregnation treatment", that is, plugging glue needs to be added to block the pores, which is wasteful. larger. And this casting can not carry out heat treatment, and as-cast mechanical performance is poor, generally at 150-180MPa, hardness is low, machinability, wear resistance are poor, product processing difficulty, roughness are poor, thereby have influenced the working performance of engine. 3. Contents of the invention ...

AI Technical Summary

Problems solved by technology

This manufacturing process requires high equipment costs, and the internal structure of the produced cylinder block is not dense, with many pores and poor air tightness. All castings need to be subjected to the subsequent process of "impregnation treatment", that is, plugging glue needs to be added to block the pores, which is wasteful. larger

And the casting cannot be heat treated, the as-cast mechanical properties are poor, generally 150-180MPa, low hardness, poor machinability, wear resistance, difficult product processing, poor roughness, thus affecting the working performance of the engine