Gas inlet cylinder of gas turbine and manufacturing process thereof

A technology of gas turbine and manufacturing process, which is applied in the direction of gas turbine devices, manufacturing tools, jet propulsion devices, etc., and can solve problems such as expensive castings, shrinkage cavities, and no effect

Inactive Publication Date: 2011-05-18
HANGZHOU STEAM TURBINE CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Foreign technical status: The castings used in the gas turbine provided by Mitsubishi Heavy Industries of Japan to Hangzhou Steam Turbine Co., Ltd. have serious shrinkage holes such as the retaining ring of the first-stage stationary vane during the finishing process, and the quality of the castings is difficult to meet the "GGC-0069 Gas Turbine Intake Cylinder". Ductile Iron Castings" and other standards stipulated requirements
Although the gas turbine intake cylinder produced with FCD450 material provided by Japan's Mitsubishi Heavy Industries basically meets the requirements stipulated in the "GGC-0069 Nodular Iron Castings for Gas Turbine Inlet C

Method used

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  • Gas inlet cylinder of gas turbine and manufacturing process thereof
  • Gas inlet cylinder of gas turbine and manufacturing process thereof
  • Gas inlet cylinder of gas turbine and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] Embodiment 1: A gas turbine inlet cylinder, its chemical composition is: C≤0.25%, Si≤0.60%, Mn≤1.00%, P≤0.040%, S≤0.040%, Cr≤0.25%, Mo≤0.25%,

[0012] Ni≤0.50%, Cu≤0.50%. Mechanical properties of the gas turbine inlet cylinder: Rm(MPa) ≥480, R P 0.2(MPa) ≥245, A≥19%, Z≥35%.

Example Embodiment

[0013] Example 2: A manufacturing process for the gas turbine inlet cylinder using the components of claim 1: 1. Determination of the casting process plan: The design of the casting process must ensure that there are no shrinkage holes (loose) in all parts of the casting, and there are many gas turbine castings. Thin-walled castings with small deviations in curved surface and wall thickness but relatively complex structures. Castings with this structure are suitable for simultaneous solidification. However, if the casting process is programmed according to the principle of simultaneous solidification, it will inevitably produce looseness in the wall thickness of the casting Therefore, the radiographic inspection of the filming part is difficult to meet, so the following process design ideas are established: sequential solidification is the main method to avoid the shrinkage (loose) defects of the castings and to ensure the inherent quality of the castings, supplemented by simulta...

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PUM

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Abstract

The invention relates to a special material of a gas inlet cylinder of an M251S type gas turbine and a manufacturing process thereof. The material comprises the following chemical components in percentage by weight: less than or equal to 0.25 percent of C, less than or equal to 0.60 percent of Si, less than or equal to 1.00 percent of Mn, less than or equal to 0.040 percent of P, less than or equal to 0.040 percent S, less than or equal to 0.25 percent of Cr, less than or equal to 0.25 percent of Mo, less than or equal to 0.50 percent of Ni and less than or equal to 0.50 percent Cu. The invention has the advantages of developing the material conforming to the requirement of the gas inlet cylinder of the M251S type gas turbine, casting and molding a product conforming to the mechanical properties of the gas inlet cylinder of the gas turbine and filling the material blank of the product in China and abroad.

Description

technical field [0001] The invention relates to a special material and a manufacturing process for an intake cylinder of an M251S type gas turbine, belonging to the field of casting materials and process manufacturing. Background technique [0002] Foreign technical status: The castings used in the gas turbine provided by Mitsubishi Heavy Industries of Japan to Hangzhou Steam Turbine Co., Ltd. have serious shrinkage holes such as the retaining ring of the first-stage stationary vane during the finishing process, and the quality of the castings is difficult to meet the "GGC-0069 Gas Turbine Intake Cylinder". Ductile iron castings" and other standards stipulated requirements. Although the gas turbine intake cylinder produced by FCD450 material provided by Japan's Mitsubishi Heavy Industries basically meets the requirements of the "GGC-0069 Nodular Iron Castings for Gas Turbine Intake Cylinder" standard, the casting price is too expensive. [0003] Domestic technology status: ...

Claims

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Application Information

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IPC IPC(8): F02C7/00F01D25/24C22C38/00B22C9/24B22C9/08C21D9/00B23P15/00
Inventor 董洪潮周黎明郭建明夏建忠
Owner HANGZHOU STEAM TURBINE CASTING & FORGING
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