Lightweight background needs
In recent years, with the acceleration of industrialization and urbanization, and the continuous upgrading of the consumption structure, China's energy demand has risen rigidly and resources and the environment have become one of the bottlenecks restricting China's economic and social development. Energy conservation, emission reduction and the protection of the environment have been resolutely implemented as basic national policies. Comprehensive implementation and implementation.Car, rail transit, aviation and shipping four major transport sector, the trend of lighter weight becomes clearer, reducing the weight of transport equipment has become an important measure to improve fuel economy in the transport field, reduce energy consumption and reduce pollution, is One of the hottest technical topics at this stage.
Taking light vehicle weight as an example, the aluminum and magnesium alloy profiles have become the important raw materials for light-weight transportation due to a variety of excellent features, and the dosage has been increasing year by year.As the American Society for Automotive Materials predicts that with the maturity and light-weight requirements of magnesium and aluminum alloy technologies Increase by 2020, the North American automobile production of magnesium alloy will reach 160kg.China Highway Society has enumerated a set of data: if the vehicle weight reduction of 10%, fuel efficiency can be increased by 6% to 8%, reducing carbon dioxide emissions 13 %; Curb weight per 100 kilograms, 100 km fuel consumption can be reduced by 0.3 to 0.6 liters. Magnesium alloy has been widely used in developed countries car dashboard, seat brackets, gearbox housing, steering control system components, the engine cover , Doors, engine blocks, frames and other components.Magnesium alloy parts, can significantly reduce weight, improve component integration, improve design flexibility, etc., so as to improve the car's power and reduce fuel consumption, Reduce emission pollution, has become the inevitable trend of the development of domestic automobile manufacturing industry.
With the development of fuel-efficient vehicles in the world, the Ministry of Industry and Information Technology has started the research on the process of stopping and stopping the sale of traditional energy vehicles, but due to the weight gain of the battery up to several hundred kilograms, it leads to the reduction of mileage. From the point of view, it is necessary to solve the impact caused by the improvement of the performance requirements of the body and the increase of the battery weight.At present, domestic and foreign experts have reached consensus on three aspects of light body weight reduction: application of new materials, optimization of body structure design, Manufacturing process.
In terms of materials, in addition to the requirements of lightweight, it must also have excellent strength, modulus, toughness, wear resistance, fatigue resistance, anti-aging properties, etc. New aluminum alloy, high strength magnesium alloy in traffic equipment, On the design, materials, manufacturing technology, surface treatment technology, safety assessment methods, life-cycle analysis constitute a full range of challenges and opportunities.
For the strength and quality requirements of magnesium, aluminum alloy parts, the corrosion resistance of the alloy surface, roughness, adhesion, flame retardant have harsh requirements, and light alloy itself, corrosion resistance, high temperature performance far Can not meet the needs of the use of components in a variety of harsh environmental conditions to ensure the use of performance and service life, the workpiece surface treatment effect is crucial, to a certain extent, is to determine the magnesium, aluminum alloy can become the key products of the process.
Case: Aluminum alloy engine cylinder
Advantages of micro-arc oxidation technology
Beijing Dulcourt Technology Co., Ltd. core ultra-micro-arc oxidation technology is a nano-functional light-alloy surface film preparation technology, which is super corrosion resistance, wear resistance, impact resistance, fatigue resistance, High temperature resistance, superhydrophobicity, superconductivity, super insulation, temperature control properties, biological activity and the above indicators to optimize the integrated industrial protective film processing technology.
The technology completely solves the traditional surface treatment technology in the film performance indicators, the stability of industrial production and environmental protection defects, the application of magnesium alloy in the transport area has the following outstanding advantages:
Technical performance advantages
Ultra-high technical indicators.No need to close, painting, electrophoresis and other secondary post-processing technology can directly reach the high-end indicators, with superior mechanical properties.
Magnesium alloy: 10μm thick film neutral salt spray ≧ 1000H (3000 hours after painting), scratch salt fog ≧ 800H;
Aluminum alloy: neutral salt spray ≧ 5000H, scratch salt spray ≧ 1000H, uniform hardness distribution ≧ 1000Hv, electrical insulation: 109--1010Ω · cm, galvanic corrosion grade B, roughness ≤ 0.01μm.
The membrane has self-healing properties and still has a complete coating of corrosion resistance in the event of minor damage, and the product's scratch salt spray test lasts for more than 800 hours.
Fire performance is superior: For flammable magnesium alloy substrate, 5μm film can delay combustion 2min, 10μm film delay 4min, 30μm or more to achieve non-flammable properties.
Industrial production advantages
Ultra-low cost. Micro-arc oxidation technology to achieve a high-power intelligent feedback control, both to achieve the ultra-dense film organization, but also significantly reduce the processing power consumption (processing power per unit area is more The traditional micro-arc oxidation 1/2 ~ 1/5), significantly reducing production costs.
Stable and efficient production. The solution can be long-term stable use, only need to add a small amount according to the production consumption; Micro-arc oxidation technology equipped with Dürr technology company independently developed power supply equipment, solution syrup, breakthrough single single processing area of 3 to 20m2, a substantial increase in production efficiency.
High environmental performance: No exhaust gas, waste residue and no heavy metal emission during the production and processing, and a small amount of waste water can meet the emission requirements after simple treatment.
Application maturity advantage
In recent years, the technology of micro-arc oxidation has been applied and verified in automobiles and high-speed rail, and has been widely applied in the field of railways. Especially for magnesium alloy parts in rail transit industry, the first ultra-micro arc oxidation nano-assembly technology, Anti-indicators to aerospace standards, to solve the problem of corrosion resistance after stone and magnesium alloy 'fear of fire' industry problems.
Application example: magnesium alloy car wheel
Magnesium alloy car wheel test report
With these outstanding advantages, Beijing Durkotte will make every effort to contribute to the light weight development in the field of transportation. By leveraging the advantages of the micro-arc oxidation technology in the development and application of related fields, share the high performance and high efficiency , Low-cost technology bonuses, to play a role as a boost for the application of magnesium alloy in the field of transportation, thus speeding up the process of lightweight development in the field of transportation.