61011 Material version 16

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Uploaded: 30.07.2013
Content: 30730103157513.rar (12 kB)
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Description

Task 1
Assign the mode of thermal and chemical-thermal treatment of gears made of steel with a hardness of tooth 20HN 58 - 62 HRC. Describe the microstructure and properties of the surface of the tooth and the core gears after heat treatment.
Task 2
For the manufacture of steel hammer dies selected 5HNV. Decipher composition and determine the group began its destination. Assign the mode of heat treatment, provide justification, to explain the effect of doping on the transformations occurring during heat treatment of the steel. Describe the microstructure and properties after heat treatment of dies.
Activity 3
For the manufacture of high-speed aircraft plating applied titanium-based alloys. Explain the reasons for the use of these alloys instead of aluminum. Give examples of titanium alloys and compare their mechanical characteristics with the characteristics of aluminum alloys at 200 - 500 0C.
Task 4
For the manufacture of cutting tools used alloys and T5K10 T15K6. Specify the composition of the alloy, the manufacturing method and scope. Explain the reasons for the high heat resistance of these alloys compared with carbon and high-speed steels.

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