阅读说明：本技术 汽车叶轮铸造工艺 (Casting process of automobile impeller ) 是由 马学建 薛安柱 于 2019-10-29 设计创作，主要内容包括：本发明公布一种汽车叶轮铸造工艺,属于铸造生产加工技术领域。S1：模具,放入中频真空感应熔炼炉内加热保温；S2：将铁、铬、钛、锰、硅、铝放至熔炉中,使材料完全融化；S3：将融化液搅拌均匀；S4：取出模具,镀上蜡层；S5：将融化液却至1300℃-1400℃后,加入孕育剂,然后注入模具中；S6：注入过程分为三次,每次注入后全方位敲打模具；S7：对模具超声震荡；S8：静置；S9：对于模具进行冷却至室温,直至融化液完全凝固；S10：脱模。本发明通过在熔炼过程中,加入锰、硅、铝进行脱氧以增强合金的抗腐蚀性；加入孕育剂促进了晶核的形成时,通过超声震荡细化碳化物晶粒,提高叶轮的冲击韧性。(The invention discloses a casting process of an automobile impeller, and belongs to the technical field of casting production and processing. S1: the mold is placed into a medium-frequency vacuum induction melting furnace for heating and heat preservation; s2: putting iron, chromium, titanium, manganese, silicon and aluminum into a melting furnace to completely melt the materials; s3: uniformly stirring the melt liquid; s4: taking out the mold, and plating a wax layer; s5: cooling the melt to 1300-1400 ℃, adding an inoculant, and injecting into a mold; s6: the injection process is divided into three times, and the mold is knocked in all directions after each injection; s7: carrying out ultrasonic oscillation on the mould; s8: standing; s9: cooling the mould to room temperature until the melt is completely solidified; s10: and (6) demolding. In the smelting process, manganese, silicon and aluminum are added for deoxidation so as to enhance the corrosion resistance of the alloy; when the nucleating agent is added to promote the formation of crystal nucleus, carbide crystal grains are refined through ultrasonic oscillation, and the impact toughness of the impeller is improved.)

1. The casting process of the automobile impeller is characterized by comprising the following steps:

s1: manufacturing a forming mold, and putting the forming mold into a medium-frequency vacuum induction melting furnace for heating and heat preservation;

s2: putting iron, chromium, titanium, manganese, silicon and aluminum into a smelting furnace, and continuously heating the smelting furnace to completely melt the materials; the material comprises (by weight) Fe 100-180 parts, Cr 50-80 parts, Ti 0.1-0.5 part, Mn 40-80 parts, Si 0.1-0.4 part, and Al 0.1-0.8 part;

s3: uniformly stirring the melt liquid;

s4: taking out the mold, and plating a wax layer;

s5: cooling the melt to 1300-1400 ℃, adding an inoculant, and injecting into a mold;

s6: the injection process is divided into three times, and the mold is knocked in all directions after each injection;

s7: carrying out ultrasonic oscillation on the mould;

s8: standing;

s9: cooling the mould to room temperature until the melt is completely solidified;

s10: and (6) demolding.

2. The automobile impeller casting process according to claim 1, wherein: the inoculant in the step S5 is any one of rare earth elements RE.

3. The automobile impeller casting process according to claim 1, wherein: in step S6, the injection amount is one third of the entire amount.

4. The automobile impeller casting process according to claim 1, wherein: in step S7, the power of ultrasonic oscillation is 40-80W, and the oscillation time is 1-2 minutes.

5. The automobile impeller casting process according to claim 1, wherein: in step S7, the standing time is 5 to 10 minutes.

Technical Field

The invention relates to the technical field of casting production and processing, in particular to a casting process of an automobile impeller.

Background

In the current industrial operation, the automobile impeller is generally formed by adopting a casting process. In the casting process, the adaptability of sand casting is the widest, and small parts, large parts, simple parts and complex parts can be produced in large scale.

In the casting process of the automobile impeller, the impact toughness of the impeller is greatly reduced due to the over-high content of carbon and carbide and large crystal grains, so that the phenomena of cracks and fractures are easily generated, and the service life of the impeller is seriously influenced.

Disclosure of Invention

In order to solve the technical problem, the invention provides a casting process of an automobile impeller.

The invention is realized by the following technical scheme: an automobile impeller casting process comprises the following steps:

s1: manufacturing a forming mold, and putting the forming mold into a medium-frequency vacuum induction melting furnace for heating and heat preservation;

s2: putting iron, chromium, titanium, manganese, silicon and aluminum into a smelting furnace, and continuously heating the smelting furnace to completely melt the materials; the material comprises (by weight) Fe 100-180 parts, Cr 50-80 parts, Ti 0.1-0.5 part, Mn 40-80 parts, Si 0.1-0.4 part, and Al 0.1-0.8 part;

s3: uniformly stirring the melt liquid;

s4: taking out the mold, and plating a wax layer;

s5: cooling the melt to 1300-1400 ℃, adding an inoculant, and injecting into a mold;

s6: the injection process is divided into three times, and the mold is knocked in all directions after each injection;

s7: carrying out ultrasonic oscillation on the mould;

s8: standing;

s9: cooling the mould to room temperature until the melt is completely solidified;

s10: and (6) demolding.

It further comprises the following steps: the inoculant in the step S5 is any one of rare earth elements RE.

In step S6, the injection amount is one third of the entire amount.

In step S7, the power of ultrasonic oscillation is 40-80W, and the oscillation time is 1-2 minutes.

In step S7, the standing time is 5 to 10 minutes.

Compared with the prior art, the invention has the beneficial effects that: adding manganese, silicon and aluminum to deoxidize in the smelting process so as to enhance the corrosion resistance of the alloy; when the nucleating agent is added to promote the formation of crystal nucleus, carbide crystal grains are refined through ultrasonic oscillation, and the impact toughness of the impeller is improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.