High alloy tool and die steel hollow tube blank preparation method, hollow tube blank and ring cutter

Abstract

The invention provides a method for preparing a high-alloy tool and die steel hollow tube blank, a high-alloy tool and die steel hollow tube blank, a pipe, and an annular cutter. Make a hollow steel ingot with one end closed, fill the hollow steel ingot with the rheological material that meets the requirements of hot forging deformation, then close the open end of the hollow steel ingot, put the hollow steel ingot filled with the rheological material into the furnace for heating, and heat the well The hollow steel ingot is released from the furnace and radially forged on a precision forging machine to obtain a high-alloy tool and die billet, and the billet is put into the furnace for annealing. After annealing, it is cooled and straightened, and the positions of the inner holes at both ends of the high-alloy tool and die billet are determined. The end is cut off, and then the filled rheological material is removed to obtain a high-alloy tool and die steel hollow tube blank. The invention forms a new preparation process of the high-alloy tool and die steel hollow tube billet, shortens the manufacturing process flow, and improves the quality, material utilization rate and production efficiency.

Description

technical field [0001] The invention relates to the field of metallurgy technology, in particular to a method for preparing a high-alloy tool and die steel hollow tube blank, and the present invention also relates to the high-alloy tool and die steel hollow tube blank prepared by the above preparation method, and the high-alloy tool and die steel hollow tube blank Tubes and ring cutters made from hollow tube blanks. 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 die steel contains a large amount of alloying elements such as ...

AI Technical Summary

Problems solved by technology

The shield hob prepared by the above-mentioned existing technological process has a poor structure at the core of the steel ingot, and the material utilization rate is only 53%, and the preparation process is long and the production efficiency is low.

[0005] Due to the poor plasticity of the high-alloy tool and die steel process, the narrow deformation temperature range, large deformation resistance, difficult processing, high time-consuming and costly, and difficult to guarantee the quality

Therefore, although it is known that the use of hollow pipes in high-alloy tool steel will not only improve the quality of the product, but also greatly increase its production efficiency and material utilization, but based on the above reasons, the preparation of hollow pipes in high-alloy tool steel has always been is a problem