CN112501480A

CN112501480A - Strength alloy material for manufacturing valve chamber cover

Info

Publication number: CN112501480A
Application number: CN202011283086.5A
Authority: CN
Inventors: 李壮
Original assignee: Taizhou Tianyu Traffic Equipment Co ltd
Current assignee: Taizhou Tianyu Traffic Equipment Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-03-16

Abstract

The invention discloses a strength alloy material for manufacturing a valve chamber cover, which comprises the following components in percentage by mass: al: 78-90%, Si: 5% -10%, Mg: 0.7 to 1.4 percent, carrying out solution treatment on Al, Si and Mg for 1 to 1.5 hours at 425 to 450 ℃ according to the mixture ratio, carrying out aging manual treatment for 2 to 3 hours at 200 to 225 ℃, carrying out sample detection and carrying out die-casting forming on the alloy, relating to the technical field of alloy. The strength alloy material for manufacturing the valve chamber cover cap enables the methods such as alloy component optimization, die casting process improvement, heat treatment and the like to improve plasticity, strength and corrosion resistance, and is applied to production with excellent fluidity, mold filling capacity and high strength.

Description

Strength alloy material for manufacturing valve chamber cover

Technical Field

The invention relates to the technical field of alloy, in particular to a strength alloy material for manufacturing a valve chamber cover.

Background

With the rapid development of the automobile industry, people have higher and higher requirements on automobile aluminum alloy, and the requirements on materials with high strength and high plasticity are more and more urgent, so that the mechanical property of the die-casting aluminum alloy is further improved, and the plasticity is improved by methods such as alloy component optimization, die-casting process improvement and heat treatment, and the method is an important challenge facing aluminum alloy research workers at present. Although the current Al-Mg series and Al-Mg-Si series die casting aluminum alloys, such as 516, 518, Al-5Mg-2Si, Magsimal-59 and the like, have shown the potential of combining high strength and high plasticity, the casting performance is poor, and the application of the aluminum alloys in die casting is greatly limited.

Disclosure of Invention

Technical problem to be solved

In view of the deficiencies of the prior art, the present invention provides a strength alloy material for use in the manufacture of valve chamber covers.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a strength alloy material for manufacturing a valve chamber cover comprises the following components in percentage by mass: al: 78-90%, Si: 5% -10%, Mg: 0.7 to 1.4 percent.

Preferably, Al, Si and Mg are subjected to solution treatment for 1 to 1.5 hours at 425 to 450 ℃ according to the mixture ratio, then are subjected to aging artificial treatment for 2 to 3 hours at 200 to 225 ℃, and then are subjected to sample detection and alloy die-casting molding.

Preferably, the solid solution treatment equipment is a CWF universal muffle furnace, the temperature is set to be 425-450 ℃, Al, Si and Mg are loaded according to the proportion when the furnace temperature reaches the set temperature, the temperature change along with time is recorded by a thermocouple thermometer, timing is started when the temperature reaches the solid solution temperature, the solid solution time is 1-1.5h, and water cooling at 25-35 ℃ is carried out after heat preservation.

Preferably, the equipment used for the aging treatment is a CS101-2EBN box furnace, the aging temperature is set to be 200-225 ℃, alloy material is filled when the furnace temperature reaches the set temperature, the change of the temperature of the alloy material along with time is recorded by a thermocouple thermometer, timing is started when the temperature of the alloy material reaches the aging temperature, the aging time is 2-3h, and water cooling at 25-35 ℃ is carried out after heat preservation.

(III) advantageous effects

The invention provides a strength alloy material for manufacturing a valve chamber cover. The method has the following beneficial effects:

according to the strength alloy material for manufacturing the valve chamber cover, the solid solution strengthening effect of Si on a matrix and the strengthening effect of eutectic Si on the alloy are weakened, but the yield strength is improved by the precipitation and aging strengthening effects of Si particles, so that the plasticity, the strength and the corrosion resistance are improved by methods such as alloy composition optimization, die casting process improvement, heat treatment and the like, and the strength alloy material is applied to production with excellent fluidity, mold filling capability and higher strength.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

A strength alloy material for manufacturing a valve chamber cover comprises the following components in percentage by mass: al: 78%, Si: 5%, Mg: 0.7 percent, carrying out solution treatment on Al, Si and Mg for 1-1.5 hours at 425 ℃ according to the mixture ratio, carrying out aging manual treatment for 2 hours at 200 ℃, carrying out sample detection and die-casting and forming on the alloy, wherein the solution treatment equipment is a CWF universal muffle furnace, the temperature is set to 425 ℃, when the furnace temperature reaches the set temperature, Al, Si and Mg are loaded according to the proportion, the temperature change along with the time is recorded by a thermocouple thermometer, the timing is started when the temperature reaches the solid solution temperature, the solid solution time is 1h, water cooling is carried out at 25 ℃ after heat preservation, equipment used for aging treatment is a CS101-2EBN box furnace, the aging temperature is set to be 200 ℃, alloy materials are filled when the furnace temperature reaches the set temperature, recording the change of the temperature of the alloy material along with time through a thermocouple thermometer, starting timing when the temperature of the alloy material reaches the aging temperature, wherein the aging time is 2, and carrying out 25-water cooling after heat preservation.

Example two

A strength alloy material for manufacturing a valve chamber cover comprises the following components in percentage by mass: al: 85%, Si: 8%, Mg: 1 percent, carrying out solution treatment on Al, Si and Mg for 1.5 hours at the temperature of 450 ℃ according to the mixture ratio, carrying out manual aging treatment for 2 hours at the temperature of 200-225 ℃, carrying out sample detection and die-casting and forming on the alloy, setting the temperature of the solution treatment equipment to be 450 ℃ in a CWF universal muffle furnace, when the furnace temperature reaches the set temperature, Al, Si and Mg are loaded according to the proportion, the temperature change along with the time is recorded by a thermocouple thermometer, the timing is started when the temperature reaches the solid solution temperature, the solid solution time is 1.5h, the temperature is kept, the water cooling is carried out at 35 ℃, the equipment used for the aging treatment is a CS101-2EBN box furnace, the aging temperature is set to 225 ℃, alloy materials are filled when the furnace temperature reaches the set temperature, recording the change of the temperature of the alloy material along with time through a thermocouple thermometer, starting timing when the temperature of the alloy material reaches the aging temperature, wherein the aging time is 2, and carrying out 35 ℃ water cooling after heat preservation.

EXAMPLE III

A strength alloy material for manufacturing a valve chamber cover comprises the following components in percentage by mass: al: 90%, Si: 10%, Mg: 1.4 percent, dissolving Al, Si and Mg for 1.5 hours at 450 ℃ according to the proportion, then carrying out aging manual treatment for 2 hours at 225 ℃, carrying out sample detection and die-casting forming on the alloy, wherein the solution treatment equipment is a CWF universal muffle furnace, the temperature is set to 450 ℃, Al, Si and Mg are loaded according to the proportion when the furnace temperature reaches the set temperature, the temperature change along with time is recorded through a thermocouple thermometer, timing is started when the temperature reaches the solution temperature, the solution time is 1.5 hours, 35 ℃ water cooling is carried out after heat preservation, equipment used for aging treatment is a CS101-2EBN box furnace, the aging temperature is set to 200 ℃, alloy materials are loaded when the furnace temperature reaches the set temperature, the timing is started when the temperature of the alloy materials reaches the aging temperature, the aging time is 3 hours, and 35 ℃ water cooling is carried out after heat preservation.

According to the invention, by means of equipment and technologies such as an optical microscope, a scanning electron microscope, DIC (digital Image correction) tensile test and the like, the structure and performance relationship before and after heat treatment of vacuum die-cast aluminum alloy thin-wall and rod-shaped castings is researched, meanwhile, the influence of casting defects in the alloy on plasticity and deformation is researched through Ct scanning and fracture quantitative analysis, supersaturated Si in an alpha-Al matrix in a casting state is precipitated in a silicon dispersion particle form through heat treatment, continuous coral eutectic Si particles are fused and spheroidized, the solid solution strengthening effect of Si on the matrix and the strengthening effect of eutectic Si on the alloy are weakened, but the yield strength is increased through precipitation and aging strengthening effects of Si particles, and the yield strength is not greatly changed through mutual offset of the precipitation and aging strengthening effects of Si particles; the work hardening capacity of the alloy after heat treatment is obviously reduced, and the tensile strength is greatly reduced; eutectic Si particles and AlSiFeMn phases are main crack sources when the alloy is broken, the stress concentration degree generated when the fused and spheroidized eutectic Si particles are deformed is greatly reduced, the movement resistance of Si elements to matrix dislocation is reduced through solid solution treatment, and the plasticity of the alloy after heat treatment is obviously improved; the size of the defect on the fracture has a very obvious negative correlation with the elongation of the material, when the fracture contains the defects with larger size and more than 2 percent of area fraction, the elongation of less than 8 percent is greatly reduced, and the damage to the elongation is larger along with the increase of the size of the defect; when the sample does not contain shrinkage cavity or cold shut type defects with larger sizes, the defects are small in size and distributed dispersedly, the sample is less damaged, the elongation is higher and is more than 8%, and other factors such as clusters of fine defects, uneven distribution of a second phase and ESC crystal grains and the like can influence the fracture behavior and plasticity of the material.

The second embodiment of the detection and research is the optimal scheme, so that the method for optimizing alloy components, improving die casting process, performing heat treatment and the like improves plasticity, strength and corrosion resistance, and the method is applied to high-strength production and has excellent fluidity and filling capacity

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A strength alloy material for manufacturing a valve chamber cover is characterized by comprising the following components in percentage by mass: al: 78-90%, Si: 5% -10%, Mg: 0.7 to 1.4 percent.

2. The strength alloy material for manufacturing a valve chamber cover according to claim 1, wherein: al, Si and Mg are subjected to solution treatment for 1 to 1.5 hours at 425 to 450 ℃ according to the mixture ratio, then are subjected to aging artificial treatment for 2 to 3 hours at 200 to 225 ℃, and then are subjected to sample detection and alloy die-casting molding.

3. The strength alloy material for manufacturing a valve chamber cover according to claim 2, wherein: the solid solution treatment equipment is a CWF universal muffle furnace, the temperature is set to be 425-450 ℃, Al, Si and Mg are loaded according to the proportion when the furnace temperature reaches the set temperature, the temperature change along with the time is recorded by a thermocouple thermometer, the timing is started when the temperature reaches the solid solution temperature, the solid solution time is 1-1.5h, and the water cooling at 25-35 ℃ is carried out after the temperature is kept.

4. The strength alloy material for manufacturing a valve chamber cover according to claim 2, wherein: the equipment used for the aging treatment is a CS101-2EBN box furnace, the aging temperature is set to be 200-225 ℃, alloy material is filled when the furnace temperature reaches the set temperature, the change of the alloy material temperature along with time is recorded by a thermocouple thermometer, timing is started when the alloy material temperature reaches the aging temperature, the aging time is 2-3h, and water cooling at 25-35 ℃ is carried out after heat preservation.