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A method for enduing high-vanadium high-cobalt high-speed steel with superplasticity property

A high-vanadium, high-cobalt, high-speed steel technology is applied in the field of making high-vanadium, high-cobalt high-speed steel obtain superplastic properties, and can solve the problems of inability to fully utilize materials, narrow range of deformation speed, and very high precision requirements for temperature control equipment and forming equipment, etc. problem, to achieve the effect of great economic significance and practical value

Active Publication Date: 2005-12-07
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

Moreover, the range of superplastic deformation temperature (about 50°C) and deformation speed is quite narrow. As a result, the accuracy of temperature control equipment and forming equipment is very high in the test or production process, so that this property of the material cannot be fully utilized.

Method used

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  • A method for enduing high-vanadium high-cobalt high-speed steel with superplasticity property
  • A method for enduing high-vanadium high-cobalt high-speed steel with superplasticity property

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Embodiment Construction

[0032] The composition (wt%) of the high-vanadium high-cobalt high-speed steel master alloy that the present invention adopts is: C1.31, W5.11, Mo4.16, Cr4.33, V3.12, Co6.64, Si0.06, Mn0.19 , P0.022, S0.011.

[0033] Spray forming, the operation process of spray forming is: put the above-mentioned high-speed steel master alloy material (cast rod) into the induction furnace to heat and melt; keep it at a temperature of about 150°C higher than the melting point for a period of time, so that the temperature and composition of the melt can be uniform ; Then spray the melt with high-pressure nitrogen gas to atomize it into fine droplets, fly and deposit on the collecting substrate, complete solidification and form a block. The diameter of the catheter used in the spraying process is 4.5mm, the atomizing nitrogen pressure is 2.5MPa, the spraying distance is 350mm, the rotation speed of the substrate is 10rpm, and the gas / melt flow ratio (G / M) is about 0.40m 3 / kg.

[0034] For hot...

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Abstract

Disclosed is a method for enduing high-vanadium high-cobalt high-speed steel with superplasticity property which comprises the following steps, selecting master alloys, obtaining high speed steel block body with high vanadium and cobalt content with spraying forming technology, carrying out hot-rolling at a temperature of 950-1100 deg. C, keeping the reduction in pass to be 50-80%, and controlling the cooling down process. The invention can realize the one-time forming for knife tools and die arrangements with rather complex shapes.

Description

technical field [0001] The invention relates to a process method for obtaining superplastic properties of high-vanadium and high-cobalt high-speed steel. Background technique [0002] High-vanadium and high-cobalt high-speed steel is a high-carbon and high-alloy ledeburite steel, which is not only widely used for high-speed, large-feed and high-depth cutting, but also for cutting high hardness, high toughness and other difficult-to-machine materials . However, because there are many types of alloying elements added to the steel and the content is quite high, high-vanadium and high-cobalt high-speed steel belongs to alloy steels that are relatively difficult to process and form. [0003] At present, in order to solve the problem of difficult processing and forming of materials, people have carried out extensive research on the superplasticity of materials. When the material exhibits properties of large elongation (more than 100%) and small deformation resistance when stretc...

Claims

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Application Information

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IPC IPC(8): C22C38/30
Inventor 周灿栋樊俊飞乐海荣章靖国林一坚孙德生
Owner BAOSHAN IRON & STEEL CO LTD
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