Method for preparing inoculant for refining as-cast structure of spring steel and application method thereof

A technology of as-cast structure and application method, which is applied in the field of alloy steel, can solve the problems of unsatisfactory grain and structure refinement effect of spring steel, insufficient dispersion of carbide particles, and insufficient mechanical properties of spring steel.
CN102168220AActive Publication Date: 2011-08-31HEBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEBEI UNIV OF TECH
Publication Date
2011-08-31

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Abstract

The invention discloses a method for preparing an inoculant for refining an as-cast structure of spring steel and an application method thereof, and relates to alloy steel. The preparation method comprises the following steps of: preparing materials in a molar ratio of Fe:V:Nb:Al of (3.2-5.6):(0.5-1.5):(1.9-4.3):(1.5-3.5), melting, and centrifuging and rapidly quenching and melt-spinning to obtain a flaky rapidly-solidified FeVNbAl intermediate alloy inoculant with the average thickness of between 0.1 and 0.3mm, the average width of between 1 and 2.5mm and the average length of between 3 and 8mm, namely the inoculant for refining the as-cast structure of the spring steel. The application method comprises a step of using the inoculant for refining the as-cast structure of the spring steel by a metal melt casting method. The inoculant has a remarkable effect of refining matrix grains and structures of the spring steel, so that the comprehensive mechanical properties and the service performance of a spring steel material are further improved.
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Description

technical field

[0001] The technical solution of the invention relates to alloy steel, specifically to the preparation method and application method of the inoculant used to refine the as-cast structure of spring steel. Background technique

[0002] Spring steel refers to the steel used to make various springs. The spring uses its elastic deformation to absorb and release external force, so the spring steel is required to have a good elastic limit, good resistance to elastic decline and good yield-to-strength ratio. In order to prevent fatigue and fracture under alternating stress, the spring should have high fatigue strength and sufficiently high plasticity and toughness. In some specific environments, the spring is also required to have electrical conductivity, high temperature resistance and corrosion resistance.

[0003] Spring steel requires higher strength and fatigue limit, and is generally used in the state of quenching + medium temperature tempering to obtain a hi...

Claims

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