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High-performance heat resistant steel, and preparation method and application thereof

A heat-resistant steel, high-performance technology, used in mechanical equipment, components of pumping devices for elastic fluids, liquid fuel engines, etc., can solve incompetent, incompetent titanium alloy oxidation resistance and flame retardancy, etc. problems, to achieve excellent high temperature resistance and mechanical properties

Inactive Publication Date: 2016-08-24
SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art reports a lot of materials that can be used for compressors. The general categories of these materials from the inlet end to the high-pressure end can be: aluminum alloy, precipitation hardened stainless steel, titanium alloy, and superalloy, and the compressors of the following stages Blades, due to the high working temperature, the oxidation resistance and flame retardancy of titanium alloys are no longer competent, and high-temperature alloy blades have become the only choice, and the existing precipitation hardened stainless steel is not competent

Method used

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  • High-performance heat resistant steel, and preparation method and application thereof
  • High-performance heat resistant steel, and preparation method and application thereof
  • High-performance heat resistant steel, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1-5

[0037] Alloy materials were prepared by using elements with different contents. A total of 5 different formulations were used. The composition of each element is shown in Table 1, and in Table 1, all are mass percentage values.

[0038] The composition of various elements in the embodiment 1-5 of table 1

[0039]

[0040]

[0041] Preparation:

[0042] (1) Get required chemical element according to Table 1, smelt in non-vacuum induction furnace, regulate the content of chemical element in the smelting process, make its percentage by weight as Table 1:

[0043] And control the content of impurity elements as low as possible, after AOD refining, cast into self-consumable electrodes;

[0044] (2) Remelt and refine the consumable electrode in an electroslag furnace to further reduce the content of impurity elements so that it meets the following requirements:

[0045] S≤0.005(weight percent) P≤0.020(weight percent)

[0046] N≤0.030(weight percent) V≤0.10(weight percent) ...

Embodiment 6

[0054] Material Performance Testing

[0055] Sampling on the finished steel bars to check the mechanical properties, and carry out corresponding mechanical property tests;

[0056] The heat treatment steps and process parameters of the sample are as follows:

[0057] 1), Nb / C=13~15

[0058] Solution treatment: 1038±5°C for 40-180 minutes Cooling method: oil cooling or medium cooling with a cooling rate equivalent to oil cooling;

[0059] Aging treatment: 515±5℃ for 8-10 hours Cooling method: air cooling.

[0060] 2), Nb / C=9~12

[0061] Solution treatment: 1038±5°C for 40-180 minutes Cooling method: oil cooling or medium cooling with a cooling rate equivalent to oil cooling;

[0062] Aging treatment: 500±5℃ for 8-10 hours Cooling method: air cooling.

[0063] The finished steel bar made by embodiment 1-5 is carried out performance test

[0064] The tensile test at room temperature shows that its mechanical properties fully meet the design requirements. The test results ar...

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Abstract

The invention discloses high-performance heat resistant steel, and belongs to the technical field of high-temperature alloy materials. The high-performance heat resistant steel is composed of, by weight percentage, 0.03-0.05% of C, 14.0-16.0% of Cr, 0.60-1.00% of Mo, 6.20-6.80% of Ni, 1.35-1.75% of Cu, 0.30-0.80% of Mn, 0.24-0.75% of Nb, 0.20-0.50% of Si, and the balance Fe. The invention further discloses a preparation method and application of the high-performance heat resistant steel. The high-performance heat resistant steel has excellent high temperature resistance and mechanical properties. According to the mechanical properties at the room temperature of 25 DEG C, the tensile strength Rm at the room temperature tensile test is greater than or equal to 1245 Mpa, the yield strength RP0.2 is greater than or equal to 1030 N / mm<2>, the elongation A is greater than or equal to 13.5%, the percentage reduction of area Z is greater than or equal to 58%, the impact energy AKv is greater than or equal to 94 J, and the hardness HB is greater than or equal to 393.

Description

technical field [0001] The invention relates to alloy materials, in particular to a high-performance heat-resistant steel, its preparation method and its application. Background technique [0002] The core of material science is the basic principle of alloying, which is the main factor in the contradiction between material strengthening and toughness. That is to say, in the field of steel, strength and toughness are often irreconcilable contradictions. If the strength is high enough, the corresponding toughness cannot be guaranteed, and vice versa. [0003] However, in some special fields, such as aeroengine compressor blades, both high strength and high toughness are required. The prior art reports a lot of materials that can be used for compressors. The general categories of these materials from the inlet end to the high-pressure end can be: aluminum alloy, precipitation hardened stainless steel, titanium alloy, and superalloy, and the compressors of the following stages ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/42C22C38/48C22C38/02C22C38/04F04D29/02
CPCC22C38/44C22C38/001C22C38/02C22C38/04C22C38/42C22C38/48F04D29/023
Inventor 廖云虎雷德江黄志永丁勇刘永新高刚毅
Owner SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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