Research on Structure and Performance of Low Pressure Casting Aluminum Alloy Rear Sub-frame
As the world pays more and more attention to the problem of environmental pollution, automobile companies have carried out research and development of new materials and technologies around lightweight, and automobile lightweight has become an important direction of development. Studies have shown that 60% of vehicle energy consumption comes from the vehicle’s own weight. When the weight of vehicle equipment is reduced by 10%, the corresponding fuel consumption can be reduced by 6% to 8%. At the same time, lightweight can also improve the braking performance of cars to a certain extent, making cars a safer, more comfortable and environmentally friendly means of transportation. Aluminum alloy materials have become the first choice for lightweight automobiles today because of their light weight, high specific strength, easy processing, and good corrosion resistance.
As a key part of the chassis structure of the car, the rear subframe plays the role of supporting the front and rear axles and suspension, which can significantly improve driving control, riding safety and comfort. At the same time, the reduction in the mass of the rear subframe can enhance the overall The load-bearing performance of the car is of great significance in improving the handling and stability of the car. Therefore, the selection of the material of the rear subframe is very important to the improvement of the performance of the whole car. Traditional domestic rear subframes are mostly made of steel plates, and only a few models use aluminum alloy subframes.
The rear subframe structure of a certain model of Zotye Automobile adopts aluminum alloy materials. Through reasonable structural design and systematic process, low-pressure integrated casting is used to obtain a rear subframe that meets the requirements of strength and durability, and improves the lightness of the vehicle. Quantification level. The rear subframe has an external dimension of 1 165 mm×798 mm×396 mm, an average wall thickness of 5 mm, and a mass of 30.5 kg. It is a large and complex thin-walled part with high strength, high toughness and corrosion resistance, and steel parts. In comparison, it can achieve a weight reduction of 10.1 kg, and the weight reduction ratio is about 33%.
The mechanical properties of cast aluminum alloys depend on the characteristics, distribution and nature, number and size of defects of the second phase. Microscopic defects are the source of cracks in aluminum alloy fracture and have a greater impact on mechanical properties. Therefore, it is necessary to analyze the microstructure and mechanical properties of the low-pressure cast aluminum alloy rear subframe that has been successfully applied.
Durability bench test
The four-channel fatigue test system was used to simulate the parts of the rear sub-frame. After 300,000 tests, the product surface had no defects such as cracks and passed the durability test. It shows that the performance of the sub-frame after low-pressure casting meets the design requirements, and the lightweight chassis is improved.
Road durability test of the whole vehicle
The rear sub-frame is equipped with the entire vehicle, and a comprehensive durability test of 30,000 km is carried out in the Yancheng Proving Ground to verify the durability of the parts of the rear sub-frame. The results show that the performance of the rear subframe meets the standard requirements.
Conclusion
- The low-pressure cast aluminum alloy rear subframe has excellent mechanical properties in T6 state, with an average tensile strength of 304 MPa, an average yield strength of 245 MPa, an average elongation of 8.2%, and an average hardness of (HBW) of 99HB , To meet the design requirements of the sub-frame.
- The appearance of the sub-frame after low-pressure casting of aluminum alloy has no obvious defects, the internal structure is dense, the eutectic Si is gray elliptical distributed on the α-Al matrix, and a small amount of bright white iron-based compound is distributed in the grain boundary in the form of a skeleton.
- The tensile fracture surface of ZL101A-T6 material has a large number of equiaxed dimples and a small number of quasi-cleavage surfaces, and the fracture mode is a mixed fracture of ductility and brittleness.
- The low-pressure cast aluminum alloy rear subframe successfully passed the durability bench test and the vehicle road durability test, and its performance met the design requirements.
Please keep the source and address of this article for reprinting:Research on Structure and Performance of Low Pressure Casting Aluminum Alloy Rear Sub-frame
Minghe Die Casting Company are dedicated to manufacture and provide quality and high performance Casting Parts(metal die casting parts range mainly include Thin-Wall Die Casting,Hot Chamber Die Casting,Cold Chamber Die Casting),Round Service(Die Casting Service,Cnc Machining,Mold Making,Surface Treatment).Any custom Aluminum die casting, magnesium or Zamak/zinc die casting and other castings requirements are welcome to contact us.
Under the control of ISO9001 and TS 16949,All processes are carried out through hundreds of advanced die casting machines, 5-axis machines, and other facilities, ranging from blasters to Ultra Sonic washing machines.Minghe not only has advanced equipment but also have professional team of experienced engineers,operators and inspectors to make the customer’s design come true.
Contract manufacturer of die castings. Capabilities include cold chamber aluminum die casting parts from 0.15 lbs. to 6 lbs., quick change set up, and machining. Value-added services include polishing, vibrating, deburring, shot blasting, painting, plating, coating, assembly, and tooling. Materials worked with include alloys such as 360, 380, 383, and 413.
Zinc die casting design assistance/concurrent engineering services. Custom manufacturer of precision zinc die castings. Miniature castings, high pressure die castings, multi-slide mold castings, conventional mold castings, unit die and independent die castings and cavity sealed castings can be manufactured. Castings can be manufactured in lengths and widths up to 24 in. in +/-0.0005 in. tolerance.
ISO 9001: 2015 certified manufacturer of die cast magnesium, Capabilities include high-pressure magnesium die casting up to 200 ton hot chamber & 3000 ton cold chamber, tooling design, polishing, molding, machining, powder & liquid painting, full QA with CMM capabilities, assembly, packaging & delivery.
ITAF16949 certified. Additional Casting Service Include investment casting,sand casting,Gravity Casting, Lost Foam Casting,Centrifugal Casting,Vacuum Casting,Permanent Mold Casting,.Capabilities include EDI, engineering assistance, solid modeling and secondary processing.
Casting Industries Parts Case Studies for: Cars, Bikes, Aircraft, Musical instruments, Watercraft, Optical devices, Sensors, Models, Electronic devices, Enclosures, Clocks, Machinery, Engines, Furniture, Jewelry, Jigs, Telecom, Lighting, Medical devices, Photographic devices, Robots, Sculptures, Sound equipment, Sporting equipment, Tooling, Toys and more.
What Can we help you do next?
∇ Go To Homepage For Die Casting China
→Casting Parts-Find out what we have done.
→Ralated Tips About Die Casting Services
By Minghe Die Casting Manufacturer |Categories: Helpful Articles |Material Tags: Aluminum Casting, Zinc Casting, Magnesium Casting, Titanium Casting, Stainless Steel Casting, Brass Casting,Bronze Casting,Casting Video,Company History,Aluminum Die Casting |Comments Off
