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Method for fabricating austenitic steel and compressor casing produced therefrom

A compressor shell and austenitic steel technology, which is applied in the field of austenitic steel production and compressor shells made of austenitic steel, can solve small thermal conductivity, high thermal expansion coefficient, and shell temperature transients And other issues

Inactive Publication Date: 2009-07-29
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, because austenitic steels have a low thermal conductivity and a high coefficient of thermal expansion, there is a risk of high temperature transients inside the housing and the resulting thermal stresses and even plastic deformation

Method used

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  • Method for fabricating austenitic steel and compressor casing produced therefrom
  • Method for fabricating austenitic steel and compressor casing produced therefrom
  • Method for fabricating austenitic steel and compressor casing produced therefrom

Examples

Experimental program
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Embodiment Construction

[0024] exist figure 1 6 sub-steps for manufacturing the compressor housing 1 are described in .

[0025] exist figure 1 A sectional view of the compressor housing 1 can be seen in . Thus, the length of the compressor casing 1 is changed from figure 1 It is invisible.

[0026] figure 1 shows a compressor housing 1 in the embodiment of a cylindrical housing or ring comprising at least one housing 2 and two bushings 4a and 4b in step 1). The housing 2 consists of austenitic steel and is substantially annular. The housing 2 is designed annularly about the axis of rotation 3 . In step 1) boreholes 5a and 5b are provided on the two casings 4a and 4b.

[0027] In step 2), the sleeves 4 a and 4 b are welded to the outer wall 6 of the housing 2 .

[0028] In step 3), the housing 2 with the sleeves 4a and 4b is subjected to solution treatment and hardening. The solution treatment is performed at a certain temperature depending on the choice of shell material and for a period of...

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Abstract

The invention relates to a method for the production of austenitic steel. The method is characterized in that the steel is first plastically deformed, followed by stress relief annealing. The strength of the steel thus increases significantly, but the low temperature toughness does not decrease.

Description

technical field [0001] The invention relates to a method for the production of austenitic steel and to a compressor housing produced from austenitic steel, the compressor housing here being substantially annular. Background technique [0002] In the collective noun "fluid machinery", hydraulic turbines, steam turbines, gas turbines, windmills, centrifugal pumps, centrifugal compressors and propeller propellers are summarized. What all these machines have in common is that their purpose is to absorb energy from a fluid in order to drive other machines, or conversely, to impart energy to a fluid to increase its pressure. [0003] The casing of the compressor must be designed to withstand high internal pressures. A compressor is here understood to be a working machine for compressing gas, vapor or the like. Some compressors are used in very low operating temperatures. In this regard, operating temperatures below -120°C can occur. At such a low operating temperature, cold du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/00C21D1/30C21D9/40
CPCC21D7/12C21D1/30B21K21/06C21D9/14C21D9/08C21D2211/001
Inventor 拉尔夫·博德比特·兰根翰
Owner SIEMENS AG