Forming and fabrication method of ultra-high strength steel seamless high pressure gas cylinder

An ultra-high-strength steel, manufacturing method technology, applied in other household appliances, household appliances, applications, etc., can solve problems such as discontinuity, improve air tightness and pressure resistance, overcome discontinuity, and improve work efficiency. Effect

Inactive Publication Date: 2014-01-29
LUOYANG SUNRUI SPECIAL EQUIP
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  • Abstract
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Problems solved by technology

[0003] For our country to vigorously develop new ships facing the deep sea, the existing 25Mpa seamed high-pressure gas cylinders can no longer meet the needs. It is necessary to increase the pressure level of the high-pressure air cylinders to 40Mpa and adopt a seamless structure, which fundamentally overcomes the Welded gas cylinders produced by traditional methods have defects such as weld-related discontinuity, strength reduction, embrittlement,

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  • Forming and fabrication method of ultra-high strength steel seamless high pressure gas cylinder
  • Forming and fabrication method of ultra-high strength steel seamless high pressure gas cylinder
  • Forming and fabrication method of ultra-high strength steel seamless high pressure gas cylinder

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Embodiment Construction

[0021] The present invention is described in conjunction with accompanying drawing and specific embodiment:

[0022] Such as figure 1 , figure 2 As shown, this embodiment takes a 40MPa-grade steel seamless high-pressure gas cylinder with a water volume of 410L as an example, and adopts a seamless steel pipe of chrome-molybdenum steel QP9100 with a diameter of φ=470mm; the width of the wheel is B=140mm, and the circle of the wheel is Angle R=30mm; Imported CTA-660 hot spinning seaming machine is adopted, and the process of spinning seaming is as follows:

[0023] A method for forming and manufacturing an ultra-high-strength steel seamless high-pressure gas cylinder, the specific steps of which are as follows:

[0024] 1) Heating at the closing section of the steel pipe: combined with image 3 , using a medium frequency induction furnace to heat the closing section of the seamless steel pipe to 1150°C, the length L of the closing heating section is: L=520 mm;

[0025] 2) B...

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Abstract

The invention belongs to the technical field of the processing of seamless steel tubes and provides a forming and fabrication method of an ultra-high strength steel seamless high pressure gas cylinder. The forming and fabrication method of the ultra-high strength steel seamless high pressure gas cylinder specifically comprises the following steps of 1) heating the nosing sections of a seamless steel tube for processing the large-volume steel seamless high pressure gas cylinder to a temperature of 1000-1200 DEG C; performing hemispheric nosing and spinning on the nosing sections of the seamless steel tube for 8-10 times to obtain hemispheric cylinder shoulders; 3) obtaining the cylinder lip by performing cylinder lip spinning forming on the seamless steel tube for 3-4 times; 4) finishing and spinning the surface. According to the forming and fabrication method of the ultra-high strength steel seamless high pressure gas cylinder, ultra-high strength steel with the yield strength larger than 980 MPa can be used for fabricating the seamless high pressure air cylinder of 40 MPa level; shortcomings such as incontinuity, strength reduction, brittle fracture and tensile stress concentration and the like due to welding seams of a welded air cylinder produced through a traditional method can be prevented, and the gas tightness and pressure-resistant performance of the air cylinder can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of processing seamless steel pipes, and relates to a method for forming and manufacturing an ultra-high-strength steel seamless high-pressure gas cylinder, and is especially suitable for a 40MPa-level large-volume steel seamless high-pressure gas cylinder with strict performance and quality requirements. Background technique [0002] At present, the 25MPa high-pressure gas cylinders used in my country's ships are steel welded structure gas cylinders. The manufacturing process is as follows: firstly, the steel plate is rolled into a cylinder shape, and the cylinder body is formed by welding, and then the steel plate is stamped into the shape of the head by stamping method. Finally, the head and the two ends of the cylinder body are welded together to make a high-pressure gas cylinder. The gas cylinder thus manufactured has a longitudinal weld and two circumferential welds. However, my country's military standa...

Claims

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Application Information

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IPC IPC(8): B21D51/24
Inventor 邵飞邓春锋任方杰常磊张庆旭
Owner LUOYANG SUNRUI SPECIAL EQUIP
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