Preparation method of high alloy tool and die steel hollow tube billet

A tool and die steel and hollow tube technology, applied in the field of metallurgy, can solve the problems of hollow steel ingots with different sizes, long powder metallurgy process, and low performance of hollow steel ingots, and achieve shortened manufacturing process, chemical composition segregation and carbide Improvement of segregation and improvement of production efficiency

Active Publication Date: 2021-09-17
HEYE SPECIAL STEEL
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the above traditional methods also have different sizes and poor uniformity of the prepared hollow steel ingots, resulting in lower performance of the prepared hollow steel ingots
[0006] The injection molding process is a short-process advanced forming process that atomizes molten steel for rapid cooling and molding. It can solve the problems of segregation of alloying elements in the preparation process of traditional casting processes and the increase in costs caused by long powder metallurgy processes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment relates to a high-alloy tool and die steel hollow steel ingot injection molding method, the method as a whole is to prepare a cylindrical high-alloy tool and die steel hollow steel ingot with a hollow interior through a spray forming process, and the prepared hollow steel ingot is specifically It is used for the preparation of high-alloy tool and die steel hollow tube blanks, so as to form a new preparation method of high-alloy tool and die steel hollow tube blanks.

[0033] The injection molding method of the hollow steel ingot of high-alloy tool and die steel in this embodiment specifically includes: firstly, roll a steel plate into a core tube that meets the inner diameter and height requirements, and weld and seal the top of the core tube with a steel plate, and at the bottom of the core tube Weld the flange, and then fix the core cylinder on the rotatable collection tray in the spray chamber by the end of the welded flange, and make the axis of the c...

Embodiment 2

[0057] This embodiment relates to a method for preparing a hollow tube blank of high-alloy tool and die steel. The method specifically includes filling the hollow steel ingot made in Embodiment 1 with a rheological material that meets the deformation requirements of hot forging, and compacting the rheological material before Close the open end of the hollow steel ingot. Next, put the hollow steel ingot filled with the rheological material into the furnace for heating. After heating, the hollow steel ingot is taken out of the furnace and radially forged on a precision forging machine to obtain a high-alloy tool billet with a diameter that meets the requirements. The high-alloy tool and die billet is put into the furnace for annealing, and after annealing, it is cooled and straightened. Then, determine the positions of the inner holes at both ends of the straightened high-alloy tool and die steel billet, cut off the ends of the billet at this position, and then remove the filled...

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Abstract

The invention provides a high alloy tool and die steel hollow steel ingot injection molding method and hollow steel ingot and high alloy tool and die steel hollow tube billet preparation method, the hollow steel ingot spray forming method of the present invention includes rolling a steel plate to meet the inner diameter and height requirements The top-closed core cylinder is fixed on the rotatable collection tray in the spray chamber, and the refined high-alloy tool and die steel molten steel is sprayed to the rotating collection tray and core cylinder for atomization deposition, and the spray is used The collecting tray is continuously moved downwards to gradually deposit the sprayed ingots, and the sprayed ingots are air-cooled and then annealed and air-cooled out of the furnace. The hollow steel ingot preparation method of the present invention can make the hollow steel ingot uniform and fine in structure, dense in crystallization, greatly improved in chemical composition and carbide segregation, close to the quality of products obtained by powder metallurgy forming method, and can realize the preparation of hollow steel ingot of high alloy tool and mold steel, and The prepared hollow steel ingot can meet the requirements for the preparation of high-alloy tool and die steel hollow pipes.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a spray forming method for hollow steel ingots of high-alloy tool and die steel. At the same time, the present invention also relates to a high alloy tool and die steel hollow steel ingot prepared by the above injection molding method, and a method for preparing a high alloy tool and die steel hollow tube billet using the prepared high alloy tool and die steel hollow steel ingot. Background technique [0002] High-alloy tool and die steel, such as high-speed steel M2, M35, M2Al, etc., high-carbon chromium cold work die steel Cr12Mo1V1, high toughness and high wear resistance cold work die steel HYC3, etc., and hot work die steel such as H13E, H13, H12, etc. High-alloy tool and die steel is widely used in the manufacture of various cutting tools and various molds, including large hollow broaches, hobs, hollow rolls, shield hobs, disc scissors, etc. Because high-alloy tool and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/115B22F5/10B21J1/06B21J5/00B21K1/14
CPCB21J1/06B21J5/00B21K1/14B22F3/115B22F5/10
Inventor 梁敬斌张占普
Owner HEYE SPECIAL STEEL
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