CN104962843A - Method for carrying out heat treatment on aluminium alloy casting - Google Patents

Abstract

The invention provides a method for carrying out heat treatment on aluminium alloy casting. The method for carrying out heat treatment on the aluminium alloy casting comprises the following steps: firstly, increasing solution temperature in a heat treatment furnace to 525+/-5 DEG C; carrying out heat preservation for 8-10 hours; immediately cooling after heat preservation is finished, namely putting the aluminium alloy casting into a low temperature refrigeration bath at the temperature of 70-90 DEG C; then carrying out complete artificial ageing treatment, heating to 180+/-5 DEG C, and carrying out heat preservation for 4-6 hours; and carrying out air cooling after the artificial ageing treatment is finished. The method for carrying out heat treatment on the aluminium alloy casting has the beneficial effects that the phenomenon that fusion of the surface of the aluminium alloy casting is greatly reduced while various physical properties of the aluminium alloy casting are met, and repairing welding loss, caused by an unstable heat treatment technology, of the aluminium alloy casting is also reduced.

Description

Aluminum alloy cast forging piece heat-treating methods

Technical field

The present invention relates to pouring procedure, particularly relate to aluminum alloy cast forging piece heat-treating methods.

Background technology

The heat treating method of aluminum alloy cast forging piece mainly comprises solution treatment and adds full artificial aging process, i.e. T6 process, and corresponding aluminum alloy materials is ZL101A.Under T6 treatment condition, the solution heat temperature in general requirement heat treatment furnace is 535 ± 5 DEG C, and soaking time is 6-12 hour; Carry out cold pin process immediately after processing, heat-eliminating medium is water, and temperature is 65-100 DEG C, carries out complete artificial aging process more subsequently, and Heating temperature is 180 ± 5 DEG C, soaking time 3-8 hour, air cooling after artificial aging process.In actually operating, solution treatment processes by 535 ± 5 DEG C of standard, but the foundry goods handled well often excess temperature phenomenon can occur; namely cast(ing) surface is because of actual Heating temperature instability; local is too high and produce melting phenomenon, not only increases the repair welding rate of foundry goods, also improves the cost of foundry goods.

Summary of the invention

Object of the present invention is exactly for overcoming being hard up for money and deficiency of above-mentioned prior art existence, and provides a kind of aluminum alloy cast forging piece heat treating method.

The technical scheme adopted is:

Aluminum alloy cast forging piece heat treating method, is characterized in that comprising following methods process:

First, solid solubility temperature in heat treatment furnace is heated to 525 ± 5 DEG C, soaking time is 8-10 hour, carry out cold pin process immediately after processing, method of cooling is for putting into cryogenic refrigeration bath, and temperature is 70-90 DEG C, carry out complete artificial aging process more subsequently, Heating temperature is 180 ± 5 DEG C, soaking time 4-6 hour, air cooling after artificial aging process.

Method of the present invention can, under the prerequisite meeting the requirement of foundry goods physical properties, make the phenomenon of cast(ing) surface melting greatly reduce, and decreases the supplementary welding loss that foundry goods causes because thermal treatment process is unstable simultaneously.

Embodiment

Aluminum alloy cast forging piece heat-treating methods, is characterized in that comprising following methods process:

First, solid solubility temperature in heat treatment furnace is heated to 525 DEG C, soaking time is 9 hours, carry out cold pin process immediately after processing, method of cooling is for putting into cryogenic refrigeration bath, and temperature is 80 DEG C, carry out complete artificial aging process more subsequently, Heating temperature is 180 DEG C, soaking time 5 hours, air cooling after artificial aging process.

Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.

Claims (1)

1. aluminum alloy cast forging piece heat-treating methods, is characterized in that comprising following methods process:

First, solid solubility temperature in heat treatment furnace is heated to 525 ± 5 DEG C, soaking time is 8-10 hour, carry out cold pin process immediately after processing, method of cooling is for putting into cryogenic refrigeration bath, and temperature is 70-90 DEG C, carry out complete artificial aging process more subsequently, Heating temperature is 180 ± 5 DEG C, soaking time 4-6 hour, air cooling after artificial aging process.