Low temperature heat processing method of single feeder head eutectic Al-Si alloy piston material

Abstract

A low temperature heat processing method of single feeder head eutectic Al-Si alloy piston material is processed according to following steps: heating a cast piston in a well-type furnace to 480+(-)5 degrees centigrade, keeping the temperature for 1.5 h, then taking out from the furnace; using the water of 50 to 80 degrees centigrade to quench and cool; after quenching, heating the well-type aging furnace to 160+(-) degrees centigrade along the furnace, performing manual aging after keeping temperature for 5 , then taking out from the furnace and performing air cooling, finishing the whole process of heat process of the piston material. Each performance index of the eutectic Al-Si alloy piston material after the low temperature heat processing exceeds the each performance index order by the internal-combustion engine piston technical condition GB/T1148-93. This technical method can guarantees the piston quality and can reduce the manufacturing cost.

Description

technical field [0001] The invention relates to a heat treatment process for alloy casting parts, in particular to a heat treatment method for eutectic Al-Si alloy piston materials. Background technique [0002] The heat treatment of internal combustion engine pistons generally adopts casting waste heat quenching + artificial aging heat treatment process or conventional T6 heat treatment process. In order to reduce the weight of medium and large ordinary piston blanks, the piston blank can be changed from the original two-side riser to a single-side riser. However, the design of the single riser makes the temperature field on both sides of the piston blank quite different. Cast quenching cannot guarantee the uniformity of piston hardness. If the conventional T6 heat treatment process is still used, the energy consumption is high, the production cycle is long, the production efficiency is low, and the production cost is increased; in this way, in order to ensure the implemen...

AI Technical Summary

Problems solved by technology

In order to reduce the weight of medium and large ordinary piston blanks, the piston blank can be changed from the original two-side riser to a single-side riser. However, the design of the single riser makes the temperature field on both sides of the piston blank quite different. Cast quenching, can not guarantee the uniformity of piston hardness

If the conventional T6 heat treatment process is still used, the energy consumption is high, the production cycle is long, the production efficiency is low, and the production cost is increased; in this way, in order to ensure the implementation of the design measures of the single riser piston for weight reduction, it is urgent to find a way to ensure that the piston A new heat treatment process that reduces production costs and improves production efficiency

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