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Forming method of hourglass-shaped metal graded construction

An hourglass-shaped, metal technology, which is applied in the field of metal material manufacturing, can solve the problems of vacuum breaking at the interface, large forgings, and scrapping, etc., and achieves the effects of fast solidification, low-cost manufacturing, and reduced manufacturing costs.

Active Publication Date: 2020-05-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the fabrication of building blocks, there is a high probability of scrapping due to the breakage of vacuum at the interface between primitives due to accidental factors such as interface contamination or weld failure
For ultra-large forgings over 100t, the failure of a single interface leads to huge losses in the scrapping of the entire forging, and it is urgent to avoid risks through effective methods

Method used

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  • Forming method of hourglass-shaped metal graded construction
  • Forming method of hourglass-shaped metal graded construction
  • Forming method of hourglass-shaped metal graded construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The target product of this embodiment is a 316 stainless steel ring. Firstly, the continuous casting method is adopted, and the continuous casting slab with a width of 1000mm and a thickness of 300mm is poured, and its steel type is 316H. Then cut out the continuous casting slab element with a length of 1000mm, process and clean it, seal and weld it into a preform in a vacuum chamber. After the preform is forged and welded and further forged, a 10t-level blank element is obtained. After surface processing, cleaning, stacking, encapsulation, forging and welding, and further forging, 4 pieces of 10t-level rough base units were used to obtain 2 pieces of 20t-level rough base units. After surface processing, cleaning, stacking, packaging, and forging welding of two 20t-level blank elements, a 40t-level blank was obtained. Finally the blank is forged into a ring. Specific steps are as follows:

[0057] In the first step, blank primitives are fabricated using conventional...

Embodiment 2

[0067] The target product of this embodiment is the rotor forging. Firstly, the continuous casting method is used to cast a continuous casting slab with a width of 1600mm and a thickness of 300mm, and its steel type is 16Mn. Then cut out the continuous casting slab element with a length of 1600mm, process and clean it, seal and weld it into a preform in a vacuum chamber. After the preform is forged and welded and further forged, a 40t-level blank element is obtained. After surface processing, cleaning, stacking, encapsulation, forging and welding and further forging, 4 pieces of 40t-level rough base units were used to obtain 2 pieces of 80t-level rough base units. After surface processing, cleaning, stacking, packaging, and forging welding, two 80t-level blank elements were used to obtain one 160t-level blank. Finally the blank is forged into a rotor. Specific steps are as follows:

[0068] In the first step, blank primitives are fabricated using conventional construction ...

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Abstract

The invention discloses a step-by-step construction method for hourglass-shaped metals, which is characterized in that firstly, a conventional construction method is used to carry out one-stage construction to obtain a blank, and the blank is further forged into a circular frustum or a square frustum, which is used as the blank basic element of the next-stage construction; After that, N-level construction is carried out, and the two blank primitives are stacked together to form an hourglass shape as a whole; the two blank primitives stacked in an hourglass shape are packaged into an hourglass-shaped preform; The interface between the primitives is welded to make the hourglass-shaped preform into a blank; the blank is further forged into a circular or square platform, which is used as a blank primitive for N+1-level construction; the above steps are repeated to achieve multi-level construction and prepare more Large rough. Due to the small size of the middle of the hourglass shape and the large size of the upper and lower ends, the middle section of the small size is preferentially deformed during the deformation process, so the large deformation at the middle interface can be realized under a small pressure.

Description

technical field [0001] The invention relates to a metal material manufacturing method, in particular to a processing method for realizing metal or metal-based material forming through an hourglass-shaped hierarchical construction method. This method is not only suitable for homogeneous manufacturing of homogeneous materials, but also suitable for composite manufacturing of heterogeneous materials. Background technique [0002] Metal materials are the most indispensable materials in the development of human history. Based on their unique characteristics of cheapness, strength, toughness, and durability, metals have always occupied a dominant position in the contemporary material industry. After thousands of years of accumulation, human beings have mastered a set of quite mature metal material production technologies. For example, traditional steel production has gone through smelting, casting, pressure processing and heat treatment processes, and the product quality is stable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00
Inventor 徐斌孙明月陈响军刘朝晖李殿中李依依
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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