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Device for preparing surface gradient structure of pure nickel N6 bar and preparation method

A surface gradient, pure nickel technology, used in metal extrusion dies and other directions, can solve the problems of unstable gradient structure of pure nickel N6 bars, large plastic deformation of billet surface materials, and high processing costs, achieving simple structure and improved internal hardness. , the effect of reducing processing costs

Active Publication Date: 2021-05-28
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned defects or deficiencies, the purpose of the present invention is to provide a device and a preparation method for preparing a gradient structure on the surface of a pure nickel N6 rod, which can effectively solve the complex process, high processing cost and extrusion process in the prior art. The large plastic deformation of the blank surface material cannot occur at the same time and the gradient structure of the pure nickel N6 rod is unstable

Method used

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  • Device for preparing surface gradient structure of pure nickel N6 bar and preparation method
  • Device for preparing surface gradient structure of pure nickel N6 bar and preparation method
  • Device for preparing surface gradient structure of pure nickel N6 bar and preparation method

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Embodiment 1

[0026] Present embodiment 1 provides a kind of device that prepares pure nickel N6 rod surface gradient structure, as Figure 1-2 As shown, including the device body 11, the top of the device body 11 is an upper template 5, and the upper template 5 is fixedly connected with a upper mold fixing plate 4, and the upper mold fixing plate 4 is fixedly connected with an upper mold 6, and the lower part of the upper mold 6 is arranged There is an extrusion cylinder 7, and the lower part of the extrusion cylinder 7 is provided with an extrusion channel 9, and the lower part of the extrusion cylinder 7 and both sides of the extrusion channel 9 are provided with two symmetrical grooves 8, and the width of the groove 8 is the width of the extrusion channel 9. 1 / 7 of the diameter, the depth of the groove 8 is 3 / 7 of the diameter of the extrusion channel 9, the discharge channel 10 is arranged below the extrusion channel 9, the bottom of the device body 11 is the fixed plate 1, and the fixe...

Embodiment 2

[0029] Present embodiment 2 provides a kind of device that prepares pure nickel N6 rod surface gradient structure and is identical with embodiment 1, adopts this device to prepare the method for pure nickel N6 rod surface gradient structure, comprises the following steps:

[0030]The pure nickel N6 alloy ingot obtained by vacuum electromagnetic stirring smelting is cut into a cylindrical billet of Φ30mm×15mm by wire electric discharge cutting, and then the pure nickel N6 cylindrical billet is heated to 280°C and kept for 40 After 10 minutes, evenly smear solid graphite lubricant powder on the surface of the cylindrical blank, and simultaneously apply graphite lubricant powder on the surface of the extrusion cylinder 7, the surface of the extrusion channel 9, and the surface of the groove 8, and put the heated cylindrical blank into the extrusion Inside the cylinder 7, the upper die 6 starts to move, and the die 3 exerts pressure on the blank to start extrusion. The extrusion te...

Embodiment 3

[0032] Present embodiment 3 provides a kind of device that prepares pure nickel N6 rod surface gradient structure and is identical with embodiment 1, adopts this device to prepare the method for pure nickel N6 rod surface gradient structure, comprises the following steps:

[0033] The pure nickel N6 alloy ingot obtained by vacuum electromagnetic stirring smelting is cut into a cylindrical billet of Φ30mm×15mm by wire electric discharge cutting, and then the pure nickel N6 cylindrical billet is heated to 350°C and kept for 30 After 10 minutes, evenly smear solid graphite lubricant powder on the surface of the cylindrical blank, and simultaneously apply graphite lubricant powder on the surface of the extrusion cylinder 7, the surface of the extrusion channel 9, and the surface of the groove 8, and put the heated cylindrical blank into the extrusion Inside the cylinder 7, the upper die 6 starts to move, and the die 3 exerts pressure on the blank to start extrusion. The extrusion t...

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Abstract

The invention discloses a device for preparing a surface gradient structure of a pure nickel N6 bar and a preparation method, and belongs to the technical field of pure nickel N6 bar preparation. The device comprises a device body. An upper die plate is arranged at the top of the device body, an upper die fixing plate is fixedly connected to the lower side of the upper die plate, an upper die is fixedly connected to the upper die fixing plate, and an extrusion cylinder is arranged below the upper die. An extrusion channel is formed in the lower portion of the extrusion cylinder, two symmetrical grooves are formed in the lower portion of the extrusion cylinder and the two sides of the inside of the extrusion channel, and a discharging channel is formed below the extrusion channel. A fixing plate is arranged at the bottom of the device body, and a lower die is fixedly connected to the upper side of the fixing plate. By means of the device, the process that extrusion and blank surface material severe plastic deformation occur at the same time can be achieved, so that the surface gradient structure of the pure nickel N6 bar is prepared, the surface hardness of the surface gradient structure is remarkably improved compared with the internal hardness, the same workpiece has different mechanical properties, and the comprehensive performance of the material is effectively improved.

Description

technical field [0001] The invention relates to the technical field of preparation of pure nickel N6 rods, in particular to a device and a preparation method for preparing a surface gradient structure of pure nickel N6 rods. Background technique [0002] N6 grade pure nickel is a single austenitic non-ferrous metal. Because of its good electrical and thermal conductivity and good acid and alkali corrosion resistance, it is widely used in the manufacture of parts in the fields of coal chemical industry, soda making industry and petrochemical industry. part. However, due to the low strength and hardness of pure nickel N6, it is often unsatisfactory in some special fields, and it is prone to damage and damage during service. At present, the forming method of pure nickel N6 rods is mainly hot and cold extrusion, although extrusion deformation can endow pure nickel rods N6 with a fine structure and excellent service performance, which has been widely studied. However, when the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C23/21B21C37/04
CPCB21C23/21B21C25/02B21C37/045
Inventor 贾智汪彦江姬金金刘德学魏保林孙璇郭廷彪丁雨田
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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