A kind of manufacturing method of low pressure cylinder exhaust guide ring
A manufacturing method and a technology for a guide ring, which are applied in the field of low-pressure cylinders, can solve the problems of the complicated manufacturing process of the guide ring, the easy occurrence of spot corrosion on the welding part of the guide ring, and the influence on the production quality of the guide ring, so as to achieve the anti-corrosion ability. The effect of enhancing and improving the anti-corrosion ability
Active Publication Date: 2022-08-09
上海讴福实业有限公司
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Problems solved by technology
The production process of the guide ring is relatively complicated, and it is assembled and welded by multiple parts
[0004] The above-mentioned existing technical solutions have the following defects: due to the limitation of welding technology, impurities and dust will be contained in the welded seam, and most of these impurities and dust are hygroscopic and will form crystals on the surface of the weld seam Center, so that during the storage and transportation of the guide ring, because the water vapor in the air condenses and falls on the weld, the weld of the guide ring is prone to spot corrosion, which affects the production quality of the guide ring
Method used
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Embodiment 1
[0065] The difference between Examples 10-17 and Example 1 is that each component in the active agent is calculated as the following table by weight percentage.
[0066]
[0067] The difference between Examples 18 to 23 and Example 1 is that each component in the base layer is calculated as the following table in terms of weight percentage.
[0068]
[0069] The difference between Examples 24 to 31 and Example 1 is that each component in the thickener is calculated as the following table by weight percentage.
[0070]
[0071] The difference between Examples 32 to 44 and Example 1 is that each component in the intermediate layer is calculated as the following table in terms of weight percentage.
[0072]
[0073]
[0074] The difference between Examples 45 to 51 and Example 1 is that each component in the surface layer is calculated as the following table in terms of weight percentage.
[0075]
[0076] The difference between Examples 52-58 and Example 1 is ...
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The invention discloses a manufacturing method of a low-pressure cylinder exhaust guide ring, which relates to the technical field of low-pressure cylinders. Pre-processing; S2: cold work; S3: welding, welding between the components of the diversion ring processed in step S2; S4: grinding, welding the welding seam on the welded diversion ring and the sharp edges. Grind the burr to a smooth transition; S5: Inspection, ultrasonic flaw detection on the weld, follow-up treatment for qualified diverter rings; repair welding for unqualified diverter rings, and follow-up treatment after repair welding; S6: Heat treatment, for inspection The complete guide ring is heated to remove stress; S7: post-treatment, after the heat-treated guide ring is cooled, a layer of composite protective coating is applied on the surface of the guide ring. The preparation method of the invention has the advantage of improving the anti-corrosion performance of the guide ring.
Description
technical field [0001] The invention relates to the technical field of low-pressure cylinders, in particular to a method for manufacturing an exhaust guide ring of a low-pressure cylinder. Background technique [0002] The low-pressure cylinder is an important part of the steam turbine. It is used in conjunction with the high-pressure cylinder in the steam turbine, so that the steam turbine can maximize energy recovery and utilization according to the change of steam parameters. [0003] The components of the existing low-pressure cylinder usually contain a guide ring, and the guide ring is mainly used to guide the steam entering the low-pressure cylinder, and guide the intake steam to both sides to reduce the axial thrust of the rotor. The manufacturing process of the guide ring is relatively complicated, and it is assembled and welded by multiple parts. [0004] The above-mentioned prior art solutions have the following defects: due to the limitation of welding technology...
Claims
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IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 龚杰
Owner 上海讴福实业有限公司