The powder metallurgy products used in the automobile are the products with high scientific and technological content, which can reduce the weight of the automobile and reduce the manufacturing cost, and has the advantage of optimizing the automobile industry products
At present, there are more than 400 kinds of powder metallurgy parts used in automobiles in the world.
As a typical net final shape manufacturing technology, powder metallurgy has advantages in energy saving, material saving, environmental protection, economy, high efficiency and many other aspects, and has been gradually recognized by various industries.
Know and widely used;In particular, the application and rapid development of automotive powder metallurgy products have promoted the powder metallurgy industry into the fast track of development.
In order to explore the specific application and development trend of powder metallurgy technology and products in the automobile industry, the reporter interviewed Professor Han fenglin, senior consultant of powder metallurgy professional association of China machinery general parts industry association.
China has great potential for international application
Professor Han introduced that powder metallurgy is based on metal powder raw materials, with forming - sintering manufacturing metal products of a new metal forming technology.1940, United States
A large automobile company has changed all the oil pump gear to powder metallurgy gear, from then on powder metallurgy structural parts took root in the automobile industry.
According to data, in 2006, the total output of powder metallurgy parts in China was 78.03 million tons, among which the output of powder metallurgy parts for automobile reached 28.877 million tons.In addition,
In terms of the average weight of PM components used in light vehicles (including cars), the average weight of PM components used in domestic vehicles was 3.97 kg in 2006, compared with that in Japan
8.7kg, compared with 19.5kg in North America.In addition, the automotive industry is now open to the development of powder metallurgy parts for application parts, generally engine parts of 16 ~ 20 kg, variable
Speed parts are 15 ~ 18 kg, sub-brake parts are 8 ~ 10 kg, others are 7 ~ 9 kg.It can be seen that China has a great market potential for developing powder metallurgy auto parts.
Powder metallurgy parts can reduce cost and weight
Speaking of the development and current situation of powder metallurgy auto parts production, Professor Han said that the powder metallurgy parts used in auto manufacturing are mainly sintered oil-bearing metal bearings and powders
Metallurgical structural parts, the former is mainly produced from 90Cu-10Sn bronze, the latter is basically made from iron powder as the basic raw material.
The following are some examples of PM technology applications: A PM 64 toothed force extractor drives a gear that costs about 40% less than parts machined from steel, and
And the gear teeth do not need subsequent processing;A powder metallurgy automobile manual transmission synchronizer ring, compared with the conventional production of synchronizer ring, can reduce the cost of 38%;A kind of
The ultimate strength of the powder metallurgy composite planetary gear frame is 40% higher than that of the cast iron cutting workpiece, while the cost is reduced by more than 35%...
As can be seen from the two kinds of PM parts that have won various awards, at least three of them are made with selective compaction technology and two of them are made with warm pressing technology
Manufactured, 6 kinds of parts are composed of more than 2 different parts, in the combination of parts of the most one is composed of 18 powder metallurgy parts.Professor Han said, this
Some award-winning parts show that PM parts can not only replace cast iron parts, forged steel parts, cutting workpiece, save labor, material, energy saving, reduce production costs, but also can be reduced
The weight of the parts is conducive to the lightweight of the car.More importantly, the development of powder metallurgy components, marked that some parts can only be manufactured with powder metallurgy technology, with
Important technical and economic significance.
Powder metallurgy is a "green" manufacturing technology
At present, powder metallurgy has been recognized as a green and sustainable manufacturing technology in the industry.In this regard, Professor Han from the powder metallurgy sustainable function, materials can hold
Sustainability, energy sustainability, equipment sustainability, environmental sustainability, sustainable employment, sustainable value advantages and other aspects are introduced.
For example, in the aspect of sustainable function, powder metallurgy has a high final forming capacity and material utilization rate, which can make the total energy consumption smaller.Compared with traditional craft (hot working
+ cold processing) casting or forging + cutting processing compared to the powder metallurgy process manufacturing the same part only need to use a few procedures, can complete the process more, more complex
In terms of material sustainability, the final forming capability of PM is its main advantage.For example, to form a toothed part, the conventional cutting process will have up to 40% Materials become chips, and 85% of the total powder used in powder metallurgy is produced from recycled materials.In the production process of powder metallurgy parts, each process The waste loss is generally 3% or less, and the material utilization rate can reach 95%.
In terms of energy sustainability, conventional manufacturing processes require several heating and reheating processes to form.When steel or iron powder is produced by atomization,
Only one smelting of the scrap is required, and all other hot-working operations are carried out at temperatures below the melting point, which not only saves energy, but also results in the final shap
And the formation of the required material properties, mechanical performance.By comparing the utilization rate of metal forming process materials, it is found that the energy required to manufacture powder metallurgy parts is forging -
Forty-four percent of machined parts.
In terms of environmental sustainability, due to the characteristics of the final forming ability of powder metallurgy, in general, the parts are made into finished products after sintering, which can be packaged
Shipment, delivery.In most cases, the amount of cutting oil used in processing PM products is negligible, and the amount of toxic pollutants released by sources such as cooling water is relatively small
The less.Compared with other manufacturing processes, the powder metallurgy parts industry has little environmental harm.
At present, the powder metallurgy parts have been an indispensable kind of basic parts in the automobile industry.In the near future, the Chinese mainland will gradually become the world's largest distribution center of powder metallurgy automotive parts
Post time: Mar-10-2021