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H-shaped steel manufacturing method for nuclear fusion reactor magnet support

A technology of magnet support and manufacturing method, applied in the field of forging manufacturing, can solve the problems of large machining allowance, long machining cycle and high manufacturing cost, and achieve the effects of small machining residual material, short machining cycle and low manufacturing cost

Active Publication Date: 2018-09-18
GUIZHOU AEROSPACE XINLI CASTINGSAND FORGINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the products produced by forging are cut off due to the fiber direction inside the forging, which not only reduces their comprehensive mechanical properties and service life, but also requires a lot of time for machining due to the large machining allowance, and also causes waste of raw materials; However, casting is used for molding, and there is a problem of uneven distribution of material structure, resulting in comprehensive mechanical properties that cannot meet the manufacturing requirements of pressure vessels.
These two methods are made by mechanical processing to remove excess metal, which has large machining allowance, long processing cycle, large material waste and high manufacturing cost.

Method used

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  • H-shaped steel manufacturing method for nuclear fusion reactor magnet support
  • H-shaped steel manufacturing method for nuclear fusion reactor magnet support
  • H-shaped steel manufacturing method for nuclear fusion reactor magnet support

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for manufacturing H-shaped steel for nuclear fusion reactor magnet support, comprising the following steps:

[0020] Step 1: First, heat the steel ingot that has been refined in an electric furnace to 1180°C for three times of repeated upsetting and drawing, change its microstructure by forging and pressing, weld internal defects, and obtain a cross-section that meets the requirements with upper and lower flat anvils It is a rectangular bar-shaped forging billet, and then put the bar-shaped forging billet into a forging heating furnace to heat to the initial forging temperature and keep it warm for 2 hours;

[0021] Step 2: After the strip forging blank is taken out from the heating furnace, perform upsetting preforming on the strip forging blank: first, preheat the preforming lower die 2 to 280°C, apply a release agent, and then heat and One end of the fully insulated bar-shaped forging billet is put into the preformed lower die 2, and the preformed lower die ...

Embodiment 2

[0025] A method for manufacturing H-shaped steel for nuclear fusion reactor magnet support, comprising the following steps:

[0026] Step 1: First, heat the steel ingot that has been refined outside the electric furnace to 1180°C for 4 repeated upsetting and elongation, change its microstructure by forging and pressing, weld internal defects, and use the upper and lower flat anvils to obtain a cross-section that meets the requirements It is a rectangular bar-shaped forging billet, and then put the bar-shaped forging billet into the forging heating furnace to heat to the initial forging temperature and keep it warm for 2.1 hours;

[0027] Step 2: After the strip forging blank is taken out from the heating furnace, perform upsetting preforming on the strip forging blank: first preheat the preforming lower mold 2 to 300°C, apply a release agent, and then heat and One end of the fully insulated bar-shaped forging billet is put into the preformed lower die 2, and the preformed lowe...

Embodiment 3

[0031] A method for manufacturing H-shaped steel for nuclear fusion reactor magnet support, comprising the following steps:

[0032] Step 1: First, heat the steel ingot that has been refined outside the electric furnace to 1180°C for 5 times of repeated upsetting and elongation, change its microstructure by forging and pressing, weld internal defects, and use the upper and lower flat anvils to obtain a cross-section that meets the requirements It is a rectangular bar-shaped forging billet, and then put the bar-shaped forging billet into the forging heating furnace to heat to the initial forging temperature and keep it warm for 2.5 hours;

[0033]Step 2: After the strip forging blank is taken out from the heating furnace, perform upsetting preforming on the strip forging blank: first preheat the preforming lower die 2 to 340°C, apply a release agent, and then heat and One end of the fully insulated bar-shaped forging billet is put into the preformed lower die 2, and the preform...

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Abstract

The invention relates to a manufacturing method of H-shaped steel for a nuclear fusion reactor magnetic body support. The manufacturing method includes the following steps that firstly, a steel ingot subject to electric furnace refining and external refining is heated to the initial forging temperature being 1180 DEG C to be subject to heat preservation, three to five times of repeated upsetting and drawing out are carried out within the scope ranging from 850 DEG C to 1180 DEG C, and then a strip-shaped forging stock is placed into a forging piece heating furnace to be heated to initial forging temperature and is subject to heat preservation; upsetting premolding is carried out on the strip-shaped forging stock; the premoled strip-shaped forging stock is placed into forging piece heating furnace to be heated to initial forging temperature being 1180 DEG C and is subject to heat preservation for a certain time; and performance heat treatment, comprehensive mechanical property detection, microstructure and corrosion resistance detection, grain size detection and little allowance machining are carried out. By means of the manufacturing method, I-shaped long strip special-shaped pieces which are made of different materials, are in different sizes and have taper can be forged, the fiber directions of the I-shaped long strip special-shaped pieces are distributed according to shapes, safety and reliability are achieved, the high temperature resistance, the high pressure resistance and the corrosion resistance are achieved, the machining excessive material is small, materials are saved, the machining period is short, and the manufacturing cost is low.

Description

technical field [0001] The invention belongs to the technical field of forging and manufacturing, and relates to the manufacturing of special-shaped complex forgings, in particular to a manufacturing method of H-shaped steel for nuclear fusion reactor magnet support. Background technique [0002] H-shaped steel is a long strip shaped part with a tapered I-shaped cross section. The material is 316LN. It has very high requirements for low temperature resistance, high pressure, corrosion resistance, low internal defects, and comprehensive mechanical properties. The traditional manufacturing method of H-shaped steel is generally formed by forging a solid elongated forging, and then the excess internal allowance is removed by machining; Excess margin; or molded by casting. At present, the products produced by forging are cut off due to the fiber direction inside the forging, which not only reduces their comprehensive mechanical properties and service life, but also requires a lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J5/06B21J5/08B21J13/02
CPCB21J5/002B21J5/06B21J5/08B21J13/02
Inventor 杜力军万东海张令洪大军张毅
Owner GUIZHOU AEROSPACE XINLI CASTINGSAND FORGINGS