A heat treatment method for guide vane connecting rod
A heat treatment method and guide vane connecting rod technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of guide vane connecting rods with large volume, heavy weight, difficulty in disassembly and maintenance, etc., and achieve heat treatment results optimization and improvement Improvement of production efficiency and wear resistance
Active Publication Date: 2016-08-24
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
[0015] The present invention will be further described below in conjunction with the examples, but not as a basis for limiting the present invention.
[0016] A heat treatment method for a guide vane connecting rod, comprising the following steps:
[0017] 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 The starch paste is mixed and stirred evenly to obtain product b;
[0018] 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 guide vane connecting rod is made of GCr15 steel;
[0019] ③ Put the sealed box into a heating furnace and he...
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The invention discloses a heat treatment method of a guide vane connecting rod, which comprises the following steps: ① preparing product a and product b formed by mixing activated carbon powder, barium carbonate and starch paste; ② filling the product b into the guide vane connecting rod shaft hole, and then evenly coat the product a on the outer surface of the entire guide vane connecting rod, and finally put it into a sealed box; ③Put the sealed box into a heating furnace and heat it to 200°C to 250°C, keep it warm for 10 minutes, and then Heat to 920°C to 940°C, keep it warm for half an hour; ④Then continue to heat up to 1000°C, keep warm for half an hour, pre-cool to 850°C, and quench the guide vane connecting rod from the sealed box; ⑤The quenched guide vane connecting rod Rapidly heat up to 750°C, keep warm for one minute; ⑥Repeat step ⑤ 4 times, and drop the temperature by 10°C each time; ⑦Rapidly heat up to 650°C, keep warm for 5 minutes, then carry out oil cooling.
Description
technical field [0001] 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 [0002] 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 resistance. ...
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