Titan bronze for slot wedge on turbo generator rotor and its processing technology

A technology of steam turbine generator and rotor slot wedge, which is applied in the field of high-strength heat-resistant titanium bronze, can solve the problems of high production cost, pollution, low qualified rate of flaw detection, etc., and achieve the effect of enhancing heat dissipation speed and reducing wear and tear.

Active Publication Date: 2005-09-07
TAIXING SHENGDA COPPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This copper alloy contains high Co, Be, and Zr, which makes the production cost of the material high. At the same time, the high Be content brings certain pollution and damage to the environment and human body during the production and processing process. The material is qualified for flaw detection after forming. low rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] When the alloy composition (percentage by weight) is: Ti 0.4%, Ni 2.5%, Be 0.3%, and the balance is Cu, follow the following process: mix cryolite, salt, potassium chloride, and sodium fluoride in a ratio of 30:50:10 After the refining agent is mixed in a weight ratio of 10 to remove the water of crystallization, the refining agent of 0.5% of the charge weight is taken and laid on the bottom of the vacuum intermediate frequency induction furnace, the above-mentioned several metals are put into the furnace, and the furnace shell is closed for melting and casting; After the ingot is peeled off, temperature-controlled forging is carried out in the temperature range of 800-880 ° C; after solid solution is carried out according to the process of 950 ° C × 1 hour, the temperature is 20 ° C, the weight ratio is 6% sodium chloride and 10% polyhydroxy Quenching in a mixed solution of ethylene grease; then cold forming with a lubricant mixed with 20# engine oil and molybdenum disu...

Embodiment 2

[0024] When the alloy composition (percentage by weight) is: Ti 0.6%, Ni 1.5%, Be 0.1%, and the balance is Cu, follow the following process: mix cryolite, salt, potassium chloride, and sodium fluoride in a ratio of 30:50:10 After the refining agent is mixed in a weight ratio of 10 to remove the water of crystallization, the refining agent of 0.3% of the charge weight is taken and laid on the bottom of the vacuum intermediate frequency induction furnace, the above-mentioned several metals are put into the furnace, and the furnace shell is closed for melting and casting; After the ingot is peeled off, temperature-controlled forging is carried out in the temperature range of 800-880°C; after solid solution according to the process of 980°C×1 hour, the temperature is 20°C, the weight ratio is 15% sodium chloride and 8% polyhydroxy Quenching in a mixed solution of ethylene grease; then cold forming with a lubricant mixed with 20# engine oil and molybdenum disulfide phosphate ester a...

Embodiment 3

[0027] When the alloy composition (percentage by weight) is: Ti 0.5%, Ni 1.8%, Be0.27%, when the balance is Cu, according to the following process: cryolite, salt, potassium chloride, sodium fluoride are pressed 30:50: Mix the refining agent with a weight ratio of 10:10 to remove the crystal water, weigh 0.4% of the furnace material weight and spread it on the bottom of the vacuum intermediate frequency induction furnace, put the above-mentioned metals into the furnace, close the furnace shell and carry out melting and casting After peeling off the ingot, carry out temperature-controlled forging in the temperature range of 800-880°C; Quenching in a mixed solution of hydroxyvinyl ester; then use 20# engine oil and molybdenum disulfide phosphate ester in a weight ratio of 1:0.2 for cold forming; after aging treatment at 500°C×2 hours, the alloy material The comprehensive mechanical performance data are shown in Table 5:

[0028] Performance

unit

Room temperatu...

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PUM

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Abstract

The invention discloses a titanium bronze, which is used in slot wedge of steamer generator rotor, and process technology. This invention substitute Ti for Be and Ni for Co and adds mixed refiner to fuse and cast in vacuum medium-frequency induction furnace, so that it saves precious strategic materials, cuts back production costs and basically settles beryllium, cobalt, zirconium and copper alloy pollution to human body and environment in process. Alloy bar is treated with temperature control forging, solutionizing, quenching in clean cooling medium and cold-forming in double composition grease of 20<#> engine oil containing extreme-pressure lubricant to get comprehensive fine properties of sigma b>=700MPa, sigma 0.2>=600MPa and Delta5>=15% under room temperature, HRB>=96, conductivity>=46%, sigma b>=540MPa, sigma0.2>=480MPa and Delta5>=5% under high temperature of 427 DEG C.

Description

[0001] Field [0002] The invention relates to a high-strength heat-resistant titanium bronze for manufacturing large-capacity steam turbine generator rotor slot wedges and a processing method thereof. Background technique [0003] At present, the rotor wedges of large-capacity turbogenerators in my country are generally made of beryllium-cobalt-zirconium-copper alloy used in Westinghouse's standard specification P.D.S13411AL. The composition of the alloy is shown in Table 1, and its mechanical and electrical properties are shown in Table 2. [0004] name Mass percentage of each element (%) co Zr be Cu Cu-Co-Zr-Be 2.3～2.7 0.2～0.3 0.4～0.7 margin [0005] Performance unit Room temperature (15~27℃) High temperature (427°C) Tensile strengthб b MPa ≥690 ≥520 Yield strengthб 0.2 MPa ≥590 ≥450 Elongation δ 5 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C9/06C22F1/08
Inventor 杨吉林徐玉松
Owner TAIXING SHENGDA COPPER IND CO LTD
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