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

A turbogenerator and rotor wedge technology, applied in the field of high-strength heat-resistant titanium bronze, can solve problems such as pollution, high production costs, and low pass rate of flaw detection, and achieve the effects of reducing wear and enhancing heat dissipation speed

Active Publication Date: 2008-05-14
TAIXING SHENGDA COPPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 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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  • Titan bronze for slot wedge on turbo generator rotor and its processing technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] When the alloy composition (percentage by weight) is: Ti0.4%, Ni2.5%, Be0.3%, when the balance is Cu, according to the following process: cryolite, salt, potassium chloride, sodium fluoride are pressed 30: Mix the refining agent in a weight ratio of 50:10:10 to remove the crystal water, weigh 0.5% of the charge weight refining agent and spread it on the bottom of the vacuum intermediate frequency induction furnace, put the above-mentioned metals into the furnace, and close the furnace shell Carry out melting and casting; after peeling the ingot, carry out temperature-controlled forging in the temperature range of 800-880°C; % polyhydroxyethylene grease; then use 20# engine oil and molybdenum disulfide phosphate grease mixed in a weight ratio of 1:0.16 for cold forming; The comprehensive mechanical performance data of the material are shown in Table 3:

[0024] Table three

[0025] Performance

Embodiment 2

[0027] When the alloy composition (percentage by weight) is: Ti0.6%, Ni1.5%, Be0.1%, when the balance is Cu, according to the following process: cryolite, salt, potassium chloride, sodium fluoride are pressed 30: Mix the refining agent in a weight ratio of 50:10:10 to remove the crystal water, weigh 0.3% of the charge weight refining agent and spread it on the bottom of the vacuum intermediate frequency induction furnace, put the above-mentioned metals into the furnace, and close the furnace shell Carry out melting and casting; after peeling the ingot, carry out temperature-controlled forging in the temperature range of 800-880°C; % polyhydroxyethylene grease; then use 20# engine oil and molybdenum disulfide phosphate ester as a lubricant mixed in a weight ratio of 1:0.15 for cold forming; after aging treatment at 480°C for 2 hours, the alloy The comprehensive mechanical performance data of the material are shown in Table 4:

[0028] Table four

[0029] Performance ...

Embodiment 3

[0031] When the alloy composition (percentage by weight) is: Ti0.5%, Ni1.8%, Be0.27%, when the balance is Cu, according to the following process: cryolite, salt, potassium chloride, sodium fluoride are pressed 30: Mix the refining agent in a weight ratio of 50:10:10 to remove the crystal water, weigh 0.4% of the weight of the furnace material and spread it on the bottom of the vacuum intermediate frequency induction furnace, put the above-mentioned metals into the furnace, and close the furnace shell Carry out melting and casting; after peeling the ingot, carry out temperature-controlled forging in the temperature range of 800-880°C; % polyhydroxyethylene grease; then use 20# engine oil and molybdenum disulfide phosphate grease mixed in a weight ratio of 1:0.2 for cold forming; The comprehensive mechanical performance data of the material are shown in Table 5:

[0032] Table five

[0033] Performance

unit

Room temperature (15~27℃)

High temperature (427°...

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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] Table I [0005] [0006] Table II [0007] 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 ％ ≥15 ≥5 Hardness HRB ≥92 Conductivity %IACS ≥45 [0008] This copper alloy contains high C...

Claims

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Application Information

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