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Method for rough turning turbine seal sleeve made of high-temperature alloy GH901

A technology of high temperature alloy and steam sealing sleeve, applied in twist drills and other directions, can solve the problems of difficult processing, difficult processing and scrapped products, etc., and achieve high temperature hardness, economy and efficiency guarantee, and good effect.

Inactive Publication Date: 2014-03-26
HARBIN TURBINE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that when the steam seal sleeve is made of high-temperature alloy GH901, because the material is a typical difficult-to-machine material, when it is processed with existing cutting tools and conventional cutting parameters, there are problems of processing difficulties and easy generation of scrap products, while Provide rough turning method for steam turbine steam seal sleeve made of superalloy GH901

Method used

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  • Method for rough turning turbine seal sleeve made of high-temperature alloy GH901
  • Method for rough turning turbine seal sleeve made of high-temperature alloy GH901

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specific Embodiment approach 1

[0015] Specific implementation mode one: the rough turning method of the steam turbine steam seal sleeve of superalloy GH901 material in this implementation mode is carried out according to the following steps:

[0016] 1. Rough turning outer circle: cutting parameters are: when the allowance on one side > 4mm: f = 0.1mm / r, ap < 0.5mm, V = 0.642m / s; when 0.5mm < allowance on one side < 4mm : f=0.1mm / r, ap<0.2mm, V=0.642m / s; when single-sided allowance<0.50mm: f=0.1mm / r, ap<0.10mm, V=0.642m / s;

[0017] 2. Drilling the inner hole: the inner hole drill tool used is φ55 extended drill or φ70 extended drill, and the drill bit material is W6Mo5Cr4V2Al;

[0018] 3. Inner hole: The cutting parameters are: when the allowance on one side > 4mm: f = 0.1mm / r, ap < 0.5mm, V = 0.642m / s; when 0.5mm < allowance on one side < 4mm: f=0.1mm / r, ap<0.2mm, V=0.642m / s; when the one-sided margin<0.50mm: f=0.1mm / r, ap<0.10mm, V=0.642m / s.

[0019] According to the rough turning method of this embodim...

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Abstract

The invention provides a method for rough turning a turbine seal sleeve made of high-temperature alloy GH901 to solve the problems that when the seal sleeve is made of the high-temperature alloy GH901 and the high-temperature alloy GH901 is machined through an existing tool and according to conventional cutting parameters, machining is difficult to conduct and scrapped products easily occur due to the fact that the high-temperature alloy GH901 is a typical material difficult to machine, and relates to the method for rough turning the turbine seal sleeve. The method includes the first step of rough turning an outer circle, the second step of drilling an inner hole, and the third step of turning an inner hole. According to the turbine seal sleeve which is made of the high-temperature alloy GH901 and is machined through the rough turning method and an inner hole drill bit tool, and a drill bit can be unceasingly used for more than 30min. In addition, when the turbine seal sleeve is machined according to the cutting parameters, no bending deformation occurs after thermal treatment is conducted on the part, the effect is quite good, the technical requirement for a seal sleeve pattern is completely met, the quality is stable and reliable, and the mature process standard is reached. The method can be used for rough turning the turbine seal sleeve made of the high-temperature alloy GH901.

Description

technical field [0001] The invention relates to a rough turning method for a steam turbine steam seal sleeve. Background technique [0002] Chemical composition of GH901: C≤0.10%, Si≤0.60%, Mn≤1.00%, S≤0.03%, P≤0.03%, Cr 11.0%~14.0%, Ni 40.0%~45.0%, Mo 5.00% ~7.0%, B is 0.01%~0.02%, Ti is 2.35%~3.10%, Cu≤0.50%, Al≤0.35%, Co≤1.00%, and the balance is Fe. GH901 is an austenitic age-hardening alloy based on Fe-43Ni-12Cr, adding strengthening elements such as titanium, aluminum and molybdenum. Good performance, long-term tissue stability. Mechanical properties of GH901: Rm≥1035N / mm at room temperature, after heat treatment for rough properties 2 HB=302-388 (The parameters are quoted from B / HJ813-2006 "Technical Conditions for GH901 Alloy Profile Rough"). [0003] The steam seal sleeve is made of high-temperature alloy GH901, which is the first domestic manufacturing of steam-combustion combined cycle units. The technical requirements and specifications are different from tho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P13/02
CPCB23B1/00B23B35/00B23B51/02
Inventor 陈永亮庄乾才高思明王宝国周全隋朝龙赵新成姜东全闫佳男张彦
Owner HARBIN TURBINE
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