英文翻译论文(模板)

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本科生毕业设计(论文)专业外文翻译

原 文: Magnesium alloy electric wheel hub

micro-arc oxidation production research

译 文: 镁合金电动车轮毂微弧氧化生产研究

指导教师 : 张清郁 职称: 讲师

学生姓名 : 陈孟丽 学号:1002130301

专 业 : 机械设计制造及其自动化

院(系) : 机电工程学院

2015 年 4 月 10 日

Magnesium alloy electric wheel hub micro-arc oxidation production

research

Most electric vehicles at home and abroad is configured to aluminum alloy wheel

hub, its quality, energy saving, shock absorption, noise reduction and vehicle dynamics

characteristics index is much lower than magnesium alloys. Magnesium alloy is 30%

lighter than aluminum alloy, the damping effect is 30 times that of aluminum alloy.

Replace the aluminum alloy with magnesium alloy wheel hub, driving the development of

magnesium alloy material development and deep processing technology, to reduce electric

vehicle weight and power consumption, energy conservation and environmental protection;

To reduce vibration and noise; Improve ride comfort and electric vehicle dynamic

characteristics such as objective (transportation quality each reduce 10%, energy

consumption will be reduced 8% ~ 10%). But its corrosion resistance is poor, seriously

limits the application. Commonly used chemical oxidation and anode oxidation formation

of oxide film on magnesium alloy has certain protective effect, but its corrosion resistance,

environmental friendliness, appearance is not satisfactory, be badly in need of the

development of new surface treatment. In recent years, people trying to develop a variety

of new technologies, such as micro arc oxidation technology, the better

One Micro-arc oxidation mechanism

Micro-arc oxidation technology is a new surface treatment technology of green

environmental protection, can grow in light metal surface in situ ceramic layer directly. Its

technological characteristics, surface treatment, as well as the performance of the since the

technology was invented by the favour of people, its mechanism is to light metals such as

aluminum, magnesium, titanium and its alloy put in electrolyte aqueous solution as anode,

using the method of electrochemical spark discharge spots on the surface of the material,

the thermal chemistry, plasma chemistry and electrochemistry, under the joint action of

metal oxide ceramic layers of a surface modification technology

Two research methods and technology

This topic in the research on magnesium alloy electric wheel hub, higher

requirements on the toughness of the alloy, so choose AM60B, melt and initial temperature

of 468 ℃, the melting end temperature is 596 ℃, the liquidus temperature range of

165 ℃. The chemical composition as shown in table 1.

0

Table 1 AM60B alloy chemical composition (WB / %) Al Zn Mn Si Cu Ni Fe 杂质 余量

5.6~

6.4

≤0.20 0.26~

0.5

≤0.05

≤0.008 ≤0.001 ≤0.004

0.02

Mg

Because of the magnesium alloy electric wheel hub surface area is larger, general

above 0.4 m2, require micro-arc oxidation power supply is bigger, this subject adopts the

lanzhou university of technology institute of materials and development of MAO - 300

type nc micro-arc oxidation production device (figure 1) micro-arc oxidation on

magnesium alloy wheel casting processing, its similar to ordinary anodic oxidation

equipment, including special high-voltage power supply, micro-arc oxidation alkaline

solution of electrolytic tank, mixing system, cooling system, workpiece with stainless steel

plate for peer electrode.

With micro-arc oxidation method in sodium silicate and sodium hydroxide electrolyte

fluid system in the preparation of magnesium alloy wheel casting oxide ceramic membrane,

the concrete technological process first set oxidation process parameters and the alkaline

tank sodium silicate solution, the cleaning after micro-arc oxidation of magnesium alloy

wheel casting into cell 15 ~ 20 min, clean with clear water tank 2 ~ 4 min, add hot water in

hot water (80 ℃, 10 ~ 15 min), closed, then cool in the cold water tank 2 min, hoisted out

drainage, drying, examine the hub. After micro-arc oxidation treatment must be closed by

hot water, formed by micro-arc oxidation discharge holes so the distribution of the channel

and the surrounding a large number of micro cracks will be closed, prevent oxygen to

cause oxidation. After completion of micro-arc oxidation, from after micro-arc oxidation

on magnesium alloy wheel casting intercept film sample were analyzed, and to facilitate

test analysis, request samples made of circular plate, so the sample interception location

choice among wheels, most is shown in figure 2. Using scanning electron microscope