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Method for reducing X20Cr13 longitudinal and transverse mechanical property differences

A x20cr13, vertical and horizontal technology, applied in the field of stainless steel materials, can solve problems such as differences in mechanical properties, and achieve the effect of reducing vertical and horizontal performance differences and improving vertical and horizontal mechanical properties

Active Publication Date: 2014-06-04
SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem of the existing X20Cr13 mechanical property difference, and provide a method for reducing the longitudinal and transverse mechanical property difference of X20Cr13, the gas turbine blades or bolts produced by this method have greatly improved longitudinal and transverse mechanical properties , can effectively reduce the vertical and horizontal performance differences and meet user requirements

Method used

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  • Method for reducing X20Cr13 longitudinal and transverse mechanical property differences

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this example, we take the following steps:

[0019] Take the required elements containing the following parts by weight: C 0.17; Si 0.10; Mn 0.30; Ni 0.30;

[0020] Add rare earth element cerium in the smelting process, the content of rare earth element cerium accounts for 0.042% by weight of the total weight, control the content of impurity elements as low as possible, and pour the solution into a consumable electrode;

[0021] The consumable electrode is remelted and refined in the electroslag furnace, and the melting speed is controlled at 4.0~5.0Kg / min. While further reducing the content of impurity elements, the properties of inclusions and the directionality of crystallization are changed as much as possible to make electroslag heavy Ingot;

[0022] The electroslag remelting ingot is rounded as a whole;

[0023] The press performs three upsetting and drawing processes, and the deformation of each upsetting is ≥45%;

[0024] The finished forging adopts cross ...

Embodiment 2

[0027] In this example, we take the following steps:

[0028] Take the required elements containing the following parts by weight: C 0.19; Si 0.25; Mn 0.45; Ni 0.40;

[0029] Add rare earth element cerium in the smelting process, the content of rare earth element cerium accounts for 0.043% by weight of the total weight, control the content of impurity elements as low as possible, and pour the solution into a consumable electrode;

[0030] The consumable electrode is remelted and refined in the electroslag furnace, and the melting speed is controlled at 4.0~5.0Kg / min. While further reducing the content of impurity elements, the properties of inclusions and the directionality of crystallization are changed as much as possible to make electroslag heavy Ingot;

[0031] The electroslag remelting ingot is rounded as a whole;

[0032] The press performs three upsetting and drawing processes, and the deformation of each upsetting is ≥45%;

[0033] The finished forging adopts cross ...

Embodiment 3

[0036] In this example, we take the following steps:

[0037] Take the required elements containing the following parts by weight: C 0.20; Si 0.35; Mn 0.50; Ni 0.50; Cr 13.5, and initially smelt in a non-vacuum induction furnace at a melting temperature of 1520~1620°C;

[0038] Add rare earth element cerium in the smelting process, the content of rare earth element cerium accounts for 0.044% by weight of the total weight, control the content of impurity elements as low as possible, and pour the solution into a consumable electrode;

[0039] The consumable electrode is remelted and refined in the electroslag furnace, and the melting speed is controlled at 4.0~5.0Kg / min. While further reducing the content of impurity elements, the properties of inclusions and the directionality of crystallization are changed as much as possible to make electroslag heavy Ingot;

[0040] The electroslag remelting ingot is rounded as a whole;

[0041] The press performs three upsetting and drawin...

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Abstract

The invention relates to a method for reducing X20Cr13 longitudinal and transverse mechanical property differences and aims at solving the problem of mechanical property difference of the existing X20Cr13. The method comprises the following steps that required elements are taken for primary smelting in a non-vacuum induction furnace, and the smelting temperature is 1520 to 1620 DEG C; rare earth element cerium is added into the smelting process, the weight percent of the content of the rare earth element cerium accounts for 0.042 to 0.046 percent of the total weight, and solution is cast into a consumable electrode; the consumable electrode is remelted and refined in an electroslag furnace, the fusion speed is controlled to be 4.0 to 5.0 kg per minute, and electroslag remelted ingots are prepared; the electroslag remelted ingots are integrally subjected to circle rolling; a press is used for carrying out three-time upsetting drawing process, and the upsetting deformation quantity in each time is equal to or greater than 45 percent; the finished product forging adopts the crossed forging; and the tempering heat treatment is carried out. Gas turbine blades or screw bolts manufactured by the method have the advantages that the longitudinal and transverse mechanical performance is greatly improved, the longitudinal and transverse performance difference can be effectively reduced, and the requirements of users are reached.

Description

technical field [0001] The invention relates to a solution to the difference in longitudinal and transverse mechanical properties of gas turbine materials, in particular to a method for reducing the difference in longitudinal and transverse mechanical properties of stainless steel material X20Cr13 for gas turbine blades or bolts. technical background [0002] With the increase of domestic electricity consumption, environmental protection requirements and the development of gas turbine manufacturing technology in China, gas turbines are widely used for power generation. Their working temperature and pressure, working environment and operation safety requirements are very different from ordinary generator sets. The mechanical properties of the existing blade and bolt material X20Cr13 can no longer meet the requirements of this working condition. Contents of the invention [0003] The purpose of the present invention is to solve the technical problem of the existing X20Cr13 m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/40C22C33/04C21D8/00
Inventor 廖云虎何梦华张华国雷德江蔡少荣
Owner SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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