Heat-resistant alloy steel component having trans-scale multiphase in-situ enhancement effect and microstructure control process thereof

A technology with enhanced effect and cross-scale, applied in the field of deformation heat treatment of new metal materials, it can solve the problems that the comprehensive mechanical properties cannot meet the performance requirements, the process is complicated, the type and size of carbon and nitrogen compounds are single, etc., and achieve good high temperature microstructure stability. and wear resistance, simple method, excellent strength and toughness effect

Active Publication Date: 2015-12-16
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the process is complicated, and the types and sizes of carbon and nitrogen compounds in the product are single. Its comprehensive mechanical properties, especially high-temperature microstructure and mechanical properties, are difficult to meet the performance requirements of high-speed, heavy-load and high-temperature harsh working conditions.

Method used

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  • Heat-resistant alloy steel component having trans-scale multiphase in-situ enhancement effect and microstructure control process thereof
  • Heat-resistant alloy steel component having trans-scale multiphase in-situ enhancement effect and microstructure control process thereof
  • Heat-resistant alloy steel component having trans-scale multiphase in-situ enhancement effect and microstructure control process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The heat-resistant alloy steel composition with cross-scale multiphase in-situ strengthening effect is characterized in that: it includes the alloying elements in the mass percentage wt% as described in Table 1:

[0029] Table 1 The chemical composition of the alloy steel used in the test:

[0030]

[0031] The microstructure control process of heat-resistant alloy steel with cross-scale multiphase in-situ strengthening effect is as follows:

[0032] (1) The above-mentioned forging blank material is heated to 1150°C by induction and kept for 0.5h, then free forging is carried out at 1000°C, the deformation amount is 20%, the deformation rate is 0.6 / s, and air cooling is controlled to 880°C;

[0033] (2) Deform the sample for 3 passes at 880°C, heat and supplement the temperature and control the interval between passes to be 120s, the total deformation amount is 35%, and control air cooling to room temperature;

[0034] (3) Heat the sample after deformation heat trea...

Embodiment 2

[0036] The composition of the heat-resistant alloy steel with cross-scale multiphase in-situ strengthening effect is characterized in that it includes the alloy elements in the mass percentage wt% as described in Table 1.

[0037] The microstructure control process of heat-resistant alloy steel with cross-scale multiphase in-situ strengthening effect is as follows:

[0038] (1) The above-mentioned forging blank material is heated to 1100°C by induction and kept for 1 hour, then free forging is carried out at 950°C, the deformation amount is 15%, the deformation rate is 0.2 / s, and air cooling is controlled to 850°C;

[0039] (2) Deform the sample for 2 passes at 850°C, heat and supplement the temperature and control the interval between passes to be 90s, the total deformation amount is 25%, and control air cooling to room temperature;

[0040] (3) Heat the sample after deformation heat treatment to 870°C for austenitization, holding time is 2h, and then quench, the quenching me...

Embodiment 3

[0042] The composition of the heat-resistant alloy steel with cross-scale multiphase in-situ strengthening effect is characterized in that it includes the alloy elements in the mass percentage wt% as described in Table 1.

[0043] The microstructure control process of heat-resistant alloy steel with cross-scale multiphase in-situ strengthening effect is as follows:

[0044] (1) The above-mentioned forging blank material is heated to 1200°C by induction and kept for 20 minutes, then free forging is carried out at 1050°C, the deformation amount is 35%, the deformation rate is 0.8 / s, and air cooling is controlled to 900°C;

[0045] (2) Deform the sample for 5 passes at 900°C, heat and supplement the temperature and control the interval between passes to be 300s, the total deformation amount is 60%, and control air cooling to room temperature;

[0046] (3) Heat the sample after deformation heat treatment to 880°C for austenitization, holding time is 1h, and then quench, the quench...

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Abstract

The invention discloses a heat-resistant alloy steel component having trans-scale multiphase in-situ enhancement effect and a microstructure control process thereof. The component is characterized by comprising the following alloy elements in percentage by mass: 0.20-0.45% of C, 1.0-2.0% of Mn, 2.0-4.0% of Cr, 1.5-3.0% of Ni, 0.3-0.8% of Ti, 0.01-0.1% of Mo, 0.2-0.8% of Cu, 0.005-0.015% of N, 0.001-0.008% of RE, P not more than 0.005%, 0.005-0.01% of S, and one or two of V and Nb. The heat-resistant alloy steel component having trans-scale multiphase in-situ enhancement effect and the microstructure control process thereof, provided by the invention, can prominently improve the toughness, the wear resistance, the high-temperature structure stability and the mechanical performance of alloy steel; and the method is simple, and is easy to be realized.

Description

technical field [0001] The invention relates to a composition of heat-resistant alloy steel with cross-scale multi-phase in-situ strengthening effect and its microstructure regulation technology, especially to a heat-resistant alloy steel serving under extremely harsh working conditions such as high speed, heavy load and high temperature The composition and its microstructure control technology belong to the technical field of deformation heat treatment technology of new metal materials. Background technique [0002] With the development of science and technology, mechanical equipment is gradually developing in the direction of high speed and heavy load, and its design and operating conditions are becoming increasingly harsh, which puts forward higher requirements for its comprehensive physical, chemical and mechanical properties. Due to its excellent wear resistance, corrosion resistance, fatigue resistance and toughness, as well as good heat storage, heat conduction and he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/50C21D8/00
Inventor 王章忠张保森毛向阳朱帅帅巴志新董强胜
Owner NANJING INST OF TECH
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