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Method for processing billets out of metals and alloys and article

A processing method and blank technology, applied in metal processing equipment, manufacturing tools, upsetting presses, etc., can solve the problems of large energy consumption

Inactive Publication Date: 2002-01-02
GENERAL ELECTRIC CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Billet machining involves a great deal of energy due to the forces required to overcome the friction that occurs when the machining tool surface and the billet come into contact in order to overcome the hydrostatic pressure that develops during extrusion such as backwater extrusion

Method used

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  • Method for processing billets out of metals and alloys and article
  • Method for processing billets out of metals and alloys and article
  • Method for processing billets out of metals and alloys and article

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] exist figure 1 The method of the present invention is carried out in the apparatus shown. see Figures 3A-3H to illustrate the method. The length of the rod-shaped blank 33 is several times its width. When starting the process, the blank is loaded on the supports 21 , 22 and held between the clamps 23 , 24 . The rollers 3 , 4 , 5 together with the furnace 2 move the billet segments on the support 12 along the frame 13 . In these figures, the furnace 2 is not shown.

[0046] In general, there is no restriction on the particular billet section for processing. However, the choice of billet segment depends on its subsequent use. If the center of the blank 33 is to be processed, the blank ends rest on the supports 21 , 22 and are held in place by the grippers 23 , 24 . Thus, the rollers 3 , 4 , 5 together with the furnace 2 move the treatment section on the support 12 . If the whole billet 33 needs to be processed, the furnace 2 and the rollers 3, 4, 5 are moved star...

example 2

[0052] Several alloys were treated using the method of the present invention. These treatments were performed using a dual-phase titanium alloy "BT8" with an initial coarse lamellar structure. Titanium (α+β) alloys will show localized deformation, however, the layered α phase is stable. Therefore, these alloys do not form a uniform microcrystalline structure as easily as heat-resistant nickel alloys. In addition to the BT8 alloy, the multi-phase heat-resistant nickel alloy "Y1962" is processed. In order to reduce costs, use Figure 4 The apparatus shown processes an alloy 15mm thick and 50mm long.

example 21

[0054] It was investigated that this treatment produced a specific microstructure in a section of a duplex titanium alloy BT8 sample, which included a homogeneous spherical microcrystalline microstructure. Several samples were produced. First, the sample has a lamellar microstructure ( Figure 5 ). The grain size of the transformed β phase is 1500-2000 microns, and the grain size of the α phase is 200-300 microns. The fragments to be processed have a length and thickness of 10 mm. During compression, the cross-sectional dimension of the billet segment approaches its original diameter. At 950°C, samples 1, 2, and 3 were treated with the method described in the present invention. Sample 4 was processed according to the conditions listed in Table 1. Table 1 also lists the processing results.

[0055] sample number

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Abstract

This method refers to a method by which the physical and mechanical properties intrinsic to a fine-grain structure may be formed in metal billets using pressure treatment. The method is designed to treat rods, bars and other particularly long billets. This method is designed to lower the cost of deformational treatment for long rods and large diameter billets and creates a pre-specified microstructure, including micro-crystal structure, and specific physical and mechanical properties. This may be achieved using various treatment techniques, one of which includes the deformation of at least a part of the billet through reduction of the billets cross-section. In this method, a long rod shaped billet is used. Reduction of the cross-section is achieved using tools that permit movement along and across the billet's axis as well as being rolled about its surface, for example, a roller. In this case at least one support stand is employed for correct placement of the billet. Additionally, a pre-specified strain level is achieved using at least one of the techniques of deformation: torsion, settling and extension using tools, for example the above-mentioned stand. The stand is designed to apply a specified scheme of deformation to the billet at the deformed (strained) section and at a specified temperature. This obtains specified structure with intrinsic physical and mechanical properties.

Description

Background of the invention [0001] The present invention relates to a method of press-working a metal billet having specific physical and mechanical properties resulting from its fine-grained structural properties. This invention relates to the handling of rods, rods and other particularly long blanks. [0002] It is well known that physical and mechanical properties such as strength and plasticity depend on the microstructure of materials. Therefore, changes in microstructural properties may alter these properties. For example, it is often desirable to form a honeycomb or subgrain microstructure in a material in order to strengthen the material. [0003] Large physical and mechanical changes in material properties can be obtained by refining the microcrystalline grains, for example those with a size of 10 microns to 0.1 microns. These materials clearly exhibit high strength properties when compared to coarse-grained materials. At high temperatures, these materials exhibit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C3/08B21C37/04B21H1/18B21H7/18B21J1/02B21J5/00B21J5/08B21J9/02B21J9/06B23P9/02C21D7/13C21D8/06C21D9/00C22F1/00C22F1/10C22F1/18
CPCC21D7/13C22F1/10B21J5/00C21D8/065B21C3/08C22F1/00C22F1/183C21D9/0075B23P9/02B21H1/18B21H7/182B21J1/025B21C37/045C21D8/06B21J1/02C22F1/16
Inventor F·Z·乌特雅舍夫O·A·凯比舍夫O·R·瓦利尔克梅托夫
Owner GENERAL ELECTRIC CO
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