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High-strength hydrogen embrittlement-resistant membrane with mark of MP-5 and preparation method of high-strength hydrogen embrittlement-resistant membrane

A MP-5, high-strength technology, applied in the direction of process efficiency improvement, mechanical equipment, energy efficiency improvement, etc., can solve the problem of reduced service life of 316L diaphragm, low service life of 316L diaphragm, high temperature strength and fatigue resistance of 316L alloy The performance limits the service life and other problems, and achieves the effect of good plasticity, excellent resistance to hydrogen embrittlement, and high proportion of grain boundaries

Active Publication Date: 2022-03-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, engineering practice has found that as the pressure of the hydrogen refueling station increases to 45MPa (the design pressure of the hydrogen compressor is 52MPa), the service life of the 316L diaphragm on the hydrogen side is significantly reduced (even less than 1 / 5 of the life of the diaphragm of the 35MPa hydrogen refueling machine~ 1 / 10) When the service hydrogen pressure is further increased to 90MPa (the design pressure of the hydrogen compressor for the 70MPa hydrogen refueling station is 90MPa), the service life of the 316L diaphragm will be lower
The reason is that the high temperature strength and fatigue resistance of 316L alloy under high hydrogen pressure environment limit its service life

Method used

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  • High-strength hydrogen embrittlement-resistant membrane with mark of MP-5 and preparation method of high-strength hydrogen embrittlement-resistant membrane
  • High-strength hydrogen embrittlement-resistant membrane with mark of MP-5 and preparation method of high-strength hydrogen embrittlement-resistant membrane
  • High-strength hydrogen embrittlement-resistant membrane with mark of MP-5 and preparation method of high-strength hydrogen embrittlement-resistant membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: specification is the MP-5 diaphragm of Φ500mm * 0.5mm

[0043] Aluminum-magnesium spinel crucibles are used to melt the alloy on a 1.0-ton vacuum induction furnace. During the melting process, a refining and a refining desulfurization treatment are performed, and then the ingot is cast; the ingot is subjected to electroslag remelting after surface grinding, and remelted The ingot is ground and then forged→hot rolling→cold rolling→plate solid solution→grain boundary control treatment→sizing processing→heat treatment→surface treatment to prepare a Φ500mm×0.5mm diaphragm, see the actual diaphragm figure 1 , its chemical composition is shown in Table 1, and the preparation process is:

[0044] 1. Using electrolytic nickel, metal chromium, metal molybdenum, and metal niobium as raw materials, put Ni, Cr, Mo, and Nb into the crucible before melting, and put the calcium desulfurizer into the hopper.

[0045] 2. Use aluminum-magnesium spinel crucible for vacuum i...

Embodiment 2

[0073] Example 2: MP-5 diaphragm with a specification of Φ410mm×0.5mm

[0074] The difference from Example 1 is that the size of the prepared diaphragm is Φ410mm×0.5mm, and the physical picture of the diaphragm is shown in figure 2 .

[0075] CaO crucibles are used to melt alloys in a 500Kg vacuum induction furnace, and the alloys are melted with electrolytic nickel, metal chromium, metal molybdenum, and metal niobium as raw materials. During the smelting process, first refine at 1550°C for 10 minutes, then add a calcareous desulfurizer for 10 minutes of refining, use the thermal stability of the CaO crucible and the desulfurizer for decarburization and desulfurization, and cast ingots at 1510°C. Electroslag remelting was performed on the cast ingot, the specification of the remelted ingot was Φ230mm, and the chemical composition was shown in Table 6. Alloy forging is carried out after holding at 1130°C for 4 hours. The blank forging temperature is 1130°C and the final forg...

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Abstract

The invention relates to the field of key material parts of hydrogen energy equipment, in particular to a high-strength hydrogen embrittlement-resistant diaphragm with the mark of MP-5 and a preparation method. Based on a nickel-chromium-molybdenum alloy system, the strength and hydrogen embrittlement resistance of the diaphragm are ensured by utilizing niobium element solid solution strengthening and grain boundary regulation and control; the diaphragm is prepared through the method of vacuum or non-vacuum induction melting, steel mold casting, electroslag remelting, forging, hot rolling, cold rolling, solution treatment, small-deformation cold rolling, cutting, machining and sizing, finished product heat treatment and diaphragm surface treatment, the thickness of the diaphragm is 0.4-0.6 mm, the diameter is not smaller than 200 mm, the surface roughness Ra does not exceed 0.4 micrometer, the flatness is not larger than 0.06 mm, and the thickness of the diaphragm is not larger than 0.2 mm. The yield strength at the room temperature and the yield strength at the temperature of 250 DEG C can reach 400 MPa or above and 350 MPa or above respectively, meanwhile, good plasticity, hydrogen embrittlement resistance and fatigue resistance are achieved, and the diaphragm can be used as a hydrogen facing side diaphragm in a hydrogen diaphragm compressor with the pressure level of 45 MPa or above, especially 90 MPa or higher.

Description

technical field [0001] The invention relates to the field of materials for key components of hydrogen energy equipment, in particular to a high-strength hydrogen embrittlement-resistant diaphragm with a brand name of MP-5 and a preparation method thereof. Background technique [0002] Hydrogen energy is one of the most economical and effective alternative energy sources for human beings to get rid of dependence on the "three major energy sources". It is known as the most potential clean energy in the 21st century. Most of the hydrogen refueling stations built in my country in the future will be 70MPa or higher hydrogen refueling stations, which puts forward higher requirements for the key equipment and components of hydrogen refueling stations. The high-pressure hydrogen diaphragm compressor (hereinafter referred to as the hydrogen compressor) is an indispensable key equipment in the hydrogen refueling station, and its stability, reliability and efficiency are crucial to the...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C1/02C22B9/18C22F1/10C22F1/02F04B45/04
CPCC22C19/055C22C1/023C22B9/18C22F1/10C22F1/02F04B45/04Y02P10/25Y02E60/32
Inventor 赵明久刘家兴姜海昌戎利建
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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