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Preparation method of fatigue-resistant and hydrogen embrittlement-resistant plate for high-pressure hydrogen compressor diaphragm

A high-pressure hydrogen and fatigue-resistant technology, applied in mechanical equipment, machines/engines, and improving energy efficiency, etc., can solve the problem of low service life of 316L diaphragm, limited service life of 316L alloy high temperature strength and fatigue resistance, and service life of 316L diaphragm Reduced service life and other issues, to achieve excellent high temperature mechanical properties, excellent resistance to hydrogen embrittlement, and good plasticity

Active Publication Date: 2022-02-25
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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  • Preparation method of fatigue-resistant and hydrogen embrittlement-resistant plate for high-pressure hydrogen compressor diaphragm
  • Preparation method of fatigue-resistant and hydrogen embrittlement-resistant plate for high-pressure hydrogen compressor diaphragm
  • Preparation method of fatigue-resistant and hydrogen embrittlement-resistant plate for high-pressure hydrogen compressor diaphragm

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Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1: specification is the sheet material of 1500mm * 830mm * 0.57mm

[0039] 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 / finish rolling→plate solid solution→small deformation rolling→annealing heat treatment→cut to length to prepare a special plate of 1500mm×830mm×0.57mm, and its chemical composition is shown in Table 1 , the preparation process is:

[0040] 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.

[0041] 2. Use aluminum-magnesium spinel crucible for vacuum induction melting, refini...

Embodiment 2

[0068] Example 2: A plate with a specification of 1200mm×800mm×0.57mm

[0069] The difference from Example 1 is that the length of the prepared plate is 1200 mm and the width is 800 mm.

[0070] 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 forging temperature is 930°C. Before forging to the fi...

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Abstract

The invention relates to the field of key material parts of hydrogen energy equipment, in particular to a preparation method of a fatigue-resistant and hydrogen embrittlement-resistant plate for a high-pressure hydrogen compressor diaphragm. Based on a nickel-chromium-molybdenum alloy system, the high strength, fatigue resistance and hydrogen embrittlement resistance of the plate are guaranteed through solid solution strengthening and grain boundary regulation and control of chromium, molybdenum and niobium; the plate is prepared through the method of vacuum induction melting, steel mold casting, electroslag remelting, forging, hot rolling, cold rolling, solution treatment, small-deformation cold rolling and annealing heat treatment, the width of the plate is not smaller than 800mm, the thickness ranges from 0.4mm to 0.6mm, the length of the plate is not smaller than 1000mm, the surface roughness Ra of the plate is smaller than or equal to 0.4 micrometer, the unevenness is not larger than 10mm / m, the thickness precision is + / -0.05mm, the room-temperature yield strength and the 250DEG C yield strength of the plate respectively reach 425MPa and 350MPa or above, the room-temperature fatigue limit of the plate can reach 250MPa or above, and meanwhile, the plate has good plasticity and hydrogen embrittlement resistance, and can be used for preparing high-pressure (45MPa or above level) hydrogen diaphragm compressor diaphragm close to the hydrogen side.

Description

technical field [0001] The invention relates to the field of materials for key components of hydrogen energy equipment, in particular to a method for preparing a fatigue-resistant and hydrogen-brittle-resistant plate for a diaphragm of a high-pressure hydrogen compressor. Background technique [0002] The high-pressure hydrogen diaphragm compressor (hereinafter referred to as the high-pressure hydrogen compressor) is one of the three core equipments in the high-pressure hydrogen refueling station. The high-pressure hydrogen refueling station requires the hydrogen compressor to have large displacement, high sealing performance and high-pressure resistance. Stable operation with high efficiency and low cost under the premise of safety. Diaphragm is the key part of hydrogen compressor, not only to isolate lubricating oil and compress hydrogen, but also to reciprocate under the pressure transmitted by hydraulic oil, so as to achieve the purpose of boosting. The diaphragm of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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