A kind of wire rod for hand tools and preparation method thereof

Abstract

The application discloses a wire rod for hand tools and a production method thereof. The chemical composition of wire rod includes: [C]0.2~0.5%, [Si]≤0.1%, [Mn]0.5~1.5%, [Cr]0.5~3.0%, [Nb]≤0.2%, [ V]≤0.2%, there is a relationship of 0.1{1.8‑[Cr]}+{0.1‑[Nb]}=2{[V]‑0.1}, and one or more of the following three elements can be added, [Ti ] 0.01 to 0.1%, [B] 0.001 to 0.01%, [Al] 0.01 to 0.1%, and the balance is Fe and unavoidable impurity elements. A wire rod for hand tools of the present application, the wire rod grain size grade is ≥8, 1 / 3 cold heading does not crack, the maximum surface pit depth is ≤30 μm, and the final product has the characteristics of high surface smoothness and strong artistic sense.

Description

technical field [0001] The application relates to the field of iron and steel material manufacturing, in particular to a wire rod for hand tools and a preparation method thereof. Background technique [0002] Hand tools such as sockets and screws are widely used in daily life and industrial production. Hand tools and the like usually use steel wire rods as raw materials, and are processed into target tools through processes such as pickling, drawing, and forming. At present, the production of wire rods for hand tools mainly includes steelmaking, blanking, peeling and rolling. First, the production cost is relatively high. When making some hand tools with a large amount of deformation, it will lead to serious cracking and low yield. In addition, in the prior art, problems such as pits and pockmarks on the surface of the wire rod are prominent, which will lead to uneven chrome plating during the subsequent surface chrome plating process, thereby affecting product quality. ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wire rod for hand tools and its preparation method, research and develop around how to improve 1 / 3 cold heading performance and surface quality, and propose the technical solution of the present invention, which solves the problem of existing sleeves, screws, etc. The problem of high cold heading cracking rate and surface defective rate existing in the wire rod for hand tools with large deformation amount, so as to overcome the deficiencies in the prior art

Images