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A kind of preparation method of metal-solid composite additive blank

A composite billet and metal technology, which is applied in the field of metal-solid-solid composite additive billet preparation, can solve the problems of uneven deformation of the joint surface, deformation cracking, difficult deformation area, etc., so as to improve the difficult deformation area, uniform deformation, The effect of metal deformation homogenization

Active Publication Date: 2022-04-08
CHINA FIRST HEAVY IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing method of adding materials to make billets generally uses a single-layer billet less than 300mm, and when the multi-layer billets are compounded, the joint surfaces of the upper and lower ends of the billets are in the hard-to-deform area, so when the subsequent billets are compounded due to There are difficult-to-deform areas and tensile stress areas that lead to uneven deformation of each joint surface, and eventually deformation and cracking are prone to occur during subsequent forging after compounding

Method used

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  • A kind of preparation method of metal-solid composite additive blank
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  • A kind of preparation method of metal-solid composite additive blank

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preparation example Construction

[0039] see Figure 1-3 ,in, figure 1 and image 3 The letter p in represents pressure, and the present invention provides a kind of preparation method of metal-solid composite additive blank, comprising:

[0040] Step S1, stacking and forming a plurality of initial blanks with clean surfaces to obtain a preform.

[0041] Preferably, the initial billet is a cylindrical billet, and the initial billet (i.e. metal billet) is mainly made of a cylindrical high-quality, large-tonnage casting billet through free pier thickening and semi-closed pier thickening. The cylindrical billet is only For the upper and lower surfaces and the surface of the cylinder, the efficiency of processing the surface of the cylinder cylinder is significantly higher than that of the surrounding surface of the continuous casting slab, and there is no need to clamp the blank multiple times, so that it is convenient to process, high in processing efficiency, and greatly saves subsequent forging costs. Reduc...

Embodiment 1

[0058] test group:

[0059] Step S1, using an initial blank with a material of 508Gr.3, the initial blank size of a single block is: The monolithic initial blank consists of The original blank is heated at high temperature (heating temperature 1230°C), closed upsetting, cooled to room temperature, and sandblasted as a whole to remove all surface oxide scales, and the surface of the cylinder is bright. Remove the rust and oxide layers on the combined surface and cylinder welding area, and ensure the parallelism of the upper and lower surfaces of the original blank to be welded, the verticality of the initial blank cylinder, and the roughness of the upper and lower surfaces are 1.6μm , and then use absolute ethanol or acetone to clean the surface of the initial blank, remove the surface oil, and dry it with hot air (the temperature is controlled at 30-50 ° C), to obtain the initial blank with a clean surface, and then put 5 initial blanks with a clean surface vertically Stac...

Embodiment 2

[0074] The steps S1 and S2 of the experimental group of embodiment 2 and the control group are basically the same as those of embodiment 1, the difference being that the initial blank is different and the forging process of step S3 is different, specifically as follows:

[0075] The experimental group adopts the initial blank material of 508Gr.3, and the initial blank size of a single block is: The 203-ton integrated composite billet is composed of 4 initial billets. The monolithic initial blank consists of The billet is heated at high temperature (heating temperature 1250°C), closed upsetting and then cooled to room temperature. A single initial billet weighs about 51 tons. Subsequent machining to Therefore, a total of 8 upper and lower surfaces and 4 cylinder surfaces need to be processed from 4 initial blanks for a 203-ton integrated composite billet.

[0076] The control group adopts the initial billet material of 508Gr.3. According to the existing technology, the co...

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Abstract

The invention relates to a method for preparing a blank made of metal-solid composite additive material. The method comprises: stacking and forming a plurality of initial blanks to obtain a preform; welding the preform to make the bonding interface between the multiple initial blanks Welding to obtain a composite billet; heating the composite billet to the first temperature and keeping it warm, after reaching the temperature, performing hot press forging for the first time to obtain the first forging billet, then heating the first forging billet to the second temperature and keeping it warm, Heat the cover plate and the backing plate to the third temperature and keep them warm. After reaching the temperature, place the first forging blank on the backing plate, insert the mold into the first forging blank and the backing plate, and then place the cover plate on the first forging blank. On the forging billet, perform a second hot press forging to obtain a second forging billet. After removing the mold, reheat the second forging billet to the fourth temperature and keep it warm. After reaching the temperature, an integrated composite billet is obtained. Compared with the prior art, the present invention is more conducive to interface recombination, oxide dispersion and fragmentation, enhances the homogenization degree and bonding strength of the interface, and improves material performance.

Description

technical field [0001] The invention relates to the technical field of metal forging, in particular to a method for preparing a billet made of metal-solid composite additive material. Background technique [0002] Forging is a processing method that uses forging machinery to apply pressure to metal blanks to cause plastic deformation to obtain forgings with certain mechanical properties, certain shapes and sizes. It is one of the two major components of forging (forging and stamping). Forging can eliminate defects such as as-cast porosity produced in the metal smelting process and optimize the microstructure. At the same time, due to the preservation of complete metal flow lines, the mechanical properties of forgings are generally better than castings of the same material. For important parts with high loads and severe working conditions in related machinery, forgings are mostly used, except for plates, profiles or weldments that can be rolled with simpler shapes. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D11/10B21J5/00B21J5/02B21J1/06B21J1/04
CPCB21D11/10B21J5/002B21J5/008B21J5/025B21J1/06B21J1/04
Inventor 张心金王宝忠刘凯泉祝志超杨康朱琳时立佳
Owner CHINA FIRST HEAVY IND
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