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

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 ...

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.