Heat treatment method for guide blade connecting rod
A heat treatment method and technology of guide vane connecting rod, applied in heat treatment furnace, heat treatment equipment, coating and other directions, can solve the problems of large volume, heavy weight, disassembly and maintenance difficulty of guide vane connecting rod, etc. The effect of improving grinding performance and improving production efficiency
Active Publication Date: 2015-01-07
STATE GRID CORP OF CHINA +2
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AI Technical Summary
Problems solved by technology
However, this problem has not been paid enough attention, so the guide vane connecting rod must be disassembled and overhauled frequently to ensure its normal operation
However, the connecting rod of the guide vane is large in size and heavy in weight, and there are certain difficulties in the operation of disassembly and maintenance.
And the overall environment of the hydropower station is relatively humid, so the connecting rods of the guide vanes are prone to rust and corrosion
Method used
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Experimental program
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Embodiment Construction
[0016] The present invention will be further described below in conjunction with the examples, but not as a basis for limiting the present invention.
[0017] A heat treatment method for a guide vane connecting rod, comprising the following steps:
[0018] 1. 70 parts of activated carbon powder, 5 parts of barium carbonate and 100 parts of starch paste in parts by mass are mixed and stirred evenly to obtain product a; 70 parts of activated carbon powder in parts by mass, 5 parts of barium carbonate and 70 parts of starch paste are mixed Stir the starch paste evenly after mixing to obtain product b;
[0019] ②Fill the product b into the shaft hole of the guide vane connecting rod, and then evenly coat the product a on the entire outer surface of the guide vane connecting rod, generally with a coating thickness of 2 to 5 mm, and finally put it into a sealed box; The material of the guide vane connecting rod is GCr15 steel;
[0020] ③ Put the sealed box into a heating...
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The invention discloses a heat treatment method for a guide blade connecting rod. The method comprises the following steps: (1) a product a and a product b which are formed by mixing activated carbon powder, barium carbonate and starch paste are prepared; (2) the product b is stuffed in a shaft hole of the guide blade connecting rod, then the product a is uniformly coated on the external surface of the whole guide blade connecting rod, and finally, the guide blade connecting rod is put in a sealing box; (3) the sealing box is put in a heating furnace to be heated to 200-250 DEG C, heat preservation is performed for 10 minutes, then the sealing box is heated to 920-940 DEG C, and the heat preservation is performed for half an hour; (4) then the temperature is continuously risen to 1000 DEG C, the heat preservation is performed for half an hour, the sealing box is precooled to 850 DEG C, and the guide blade connecting rod is quenched in the sealing box; (5) the guide blade connecting rod which is quenched is quickly heated to 750 DEG C, and the heat preservation is maintained for a minute; (6) the step (5) is repeated by 4 times, and each time the temperature drops by 10 DEG C; (7) the guide blade connecting rod is quickly heated to 650 DEG C, and after the heat preservation is performed for 5 minutes, the guide blade connecting rod is oil cooled.
Description
[0001] technical field [0002] The invention relates to a heat treatment method for guide vane connecting rods, in particular to a heat treatment method for guide vane connecting rods of hydraulic turbines in hydropower stations. Background technique [0003] Turbine guide vane connecting rod is a very important mechanical component in hydropower station. The operating force of the control ring in the water guide mechanism is transmitted to the connecting plate and the guide vane arm through the guide vane connecting rod, and finally acts on the guide vanes, so as to realize the synchronous rotation of the guide vanes, realize the flow change through the change of the guide vane opening, and complete the unit. adjustment. Transmission force is the basic function of the guide vane connecting rod, so the guide vane connecting rod requires more material strength, especially the upper shaft hole of the guide vane connecting rod, which must have sufficient hardness and wear res...
Claims
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IPC IPC(8): C23C8/66C21D9/00C21D1/18C23F17/00
Inventor 李浩良游光华曾辉孔令华楼勇
Owner STATE GRID CORP OF CHINA