Wire rod for deep drawing cold drawn spring steel wire and preparation method thereof

A technology of spring steel wire and wire rod, which is applied in the field of spring steel, can solve the problems of high rate of broken wires in drawing and the inability to realize deep drawing, etc., and achieve the effect of increasing tail area shrinkage, good application prospects, and reducing production costs
CN111197140BActive Publication Date: 2021-10-22SHOUGANG CORPORATION
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHOUGANG CORPORATION
Publication Date
2021-10-22

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a wire rod for deep drawing and cold drawn spring steel wire and a preparation method thereof. Using a series of measures such as electric furnace, LF furnace, VD furnace, continuous casting process control, etc., through the organic combination of chemical composition optimization design, smelting process control, controlled rolling and controlled cooling process, the steel purity level of deep drawing wire rod It has been greatly improved, the N content is controlled within 70PPm, the central carbon segregation control is ≤1.09, the sorbite rate is ≥85%, and the mechanical performance (same circle) fluctuation of the cleaning rod is within 50Mpa. Overcome the influence of electric furnace smelting residual elements and N content on drawing performance, and realize the synergy between tensile strength and sorbite ratio. Through the optimization process test, some deep drawn products can be produced without VD furnace under certain conditions, reducing the production cost. The deep-drawn cold-drawn spring steel wire rod obtained by this method enables downstream users to reduce the rate of broken wires during cold drawing and the rate of broken wires of the coil spring during use, improve operating efficiency, and obtain excellent fatigue performance .
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of spring steel, and in particular relates to a wire rod for deep drawing and cold drawn spring steel wire and a preparation method thereof. Background technique

[0002] As a very important shock absorption and functional component, spring is widely used in automobile manufacturing and daily life. It is a high value-added product with a very large market demand. According to statistics, the demand for springs will continue to grow, and the demand for spring steel for parts will also increase simultaneously. For example, according to the statistics of the German Spring Industry Association (VDFI), in addition to suppliers, 62% of buyers in its spring steel industry come from the automotive industry. In Japan, the springs used in automobiles and motorcycles account for about 65% of the total spring steel production. Therefore, the strong development of the automobile industry will inevitably lead to the vig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More