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A kind of preparation method of austenitic stainless steel spring wire with high mechanical performance

A technology of austenitic stainless steel and spring wire is applied in the field of preparation of austenitic stainless steel spring wire with high mechanical properties, which can solve the problems of low elongation of stainless steel wire, poor straightness of finished spring, and fracture of stainless steel wire. , to achieve the effects of improved process stability, severe deformation, and increased elongation

Active Publication Date: 2019-12-03
西安诺博尔稀贵金属材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing processing technology has the following technical deficiencies: Austenitic stainless steel wire has strict requirements on mechanical properties. For wires with an outer diameter of less than 2.0mm, its tensile strength is usually 1695MPa-2500MPa, and 80% is often required to meet the strength requirements. ~90% cold working deformation, accompanied by a rapid decline in wire elongation, generally less than 5%
The elongation rate of cold-worked austenitic stainless steel wire is low, the spring winding process will cause great damage to the mold, the straightness of the finished spring is not good, and the stainless steel wire may even break. Therefore, on the basis of ensuring the strength of the austenitic stainless steel wire It is necessary to further improve its elongation

Method used

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  • A kind of preparation method of austenitic stainless steel spring wire with high mechanical performance
  • A kind of preparation method of austenitic stainless steel spring wire with high mechanical performance
  • A kind of preparation method of austenitic stainless steel spring wire with high mechanical performance

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Experimental program
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Effect test

Embodiment 1

[0032] The preparation method of the high mechanical performance austenitic stainless steel spring wire of the present embodiment comprises the following steps:

[0033] 1. Pretreatment of austenitic stainless steel bars

[0034] Such as figure 1 , take an austenitic stainless steel rod 1 with a diameter of 47mm, and seal it in a tapered copper tube 2. The tapered copper tube 2 is a tapered copper tube with equal inner diameter and variable wall thickness. 15°, the wall thickness of the small head end is 10mm, the two ends of the tapered copper tube 2 are sealed and welded with copper rods, and the tapered copper tube 2 sealed with the austenitic stainless steel rod 1 is heated to 300°C through an induction coil to obtain Pretreated austenitic stainless steel bars.

[0035] 2. Preparation of austenitic stainless steel spring wire with high mechanical properties

[0036] Step 1. Perform single-pass cold extrusion on the pretreated austenitic stainless steel bar to obtain a b...

Embodiment 2

[0042] The preparation method of the high mechanical performance austenitic stainless steel spring wire of the present embodiment comprises the following steps:

[0043] 1. Pretreatment of austenitic stainless steel bars

[0044] Such as figure 1 , take an austenitic stainless steel rod 1 with a diameter of 50 mm, and seal it in a tapered copper tube 2. The tapered copper tube 2 is a tapered copper tube with equal inner diameter and variable wall thickness. 18°, the wall thickness of the small head end is 10mm, the two ends of the tapered copper tube 2 are sealed and welded with copper rods, and the tapered copper tube 2 sealed with the austenitic stainless steel rod 1 is heated to 300°C through an induction coil to obtain Pretreated austenitic stainless steel bars.

[0045] 2. Preparation of austenitic stainless steel spring wire with high mechanical properties

[0046] Step 1. Perform single-pass cold extrusion on the pretreated austenitic stainless steel bar to obtain a ...

Embodiment 3

[0052] The preparation method of the high mechanical performance austenitic stainless steel spring wire of the present embodiment comprises the following steps:

[0053] 1. Pretreatment of austenitic stainless steel bars

[0054] Such as figure 1 , take an austenitic stainless steel rod 1 with a diameter of 30mm, and seal it in a tapered copper tube 2. The tapered copper tube 2 is a tapered copper tube with equal inner diameter and variable wall thickness. 30°, the wall thickness of the small head end is 23mm, the two ends of the tapered copper tube 2 are sealed and welded with copper rods, and the tapered copper tube 2 sealed with the austenitic stainless steel rod 1 is heated to 400°C through an induction coil to obtain Pretreated austenitic stainless steel bars.

[0055] 2. Preparation of austenitic stainless steel spring wire with high mechanical properties

[0056] Step 1. Perform single-pass cold extrusion on the pretreated austenitic stainless steel bar to obtain a b...

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Abstract

The invention discloses a manufacturing method of a high-mechanical-property austenitic stainless steel spring wire. The manufacturing method comprises the following steps that 1, an austenitic stainless steel bar obtained after pretreatment is subjected to single pass cold extruding, and a bar containing the duplex grain structure is obtained; 2, the bar containing the duplex grain structure in the step 1 is subjected to hole pattern rolling, and a wire blank is obtained; and 3, the wire blank in the step 2 is subjected to cold drawing, and the high-mechanical-property austenitic stainless steel spring wire is obtained. According to the method, the duplex grain degree of the austenitic stainless steel spring wire can be improved, and on the premise of ensuring the strength of the austenitic stainless steel spring wire, the ductility of the austenitic stainless steel spring wire is further improved.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a preparation method of an austenitic stainless steel spring wire with high mechanical properties. Background technique [0002] Austenitic stainless steel spring wire, as the raw material for making springs, has very strict requirements on processing methods, material properties, dimensional accuracy, surface quality and non-destructive testing. At present, austenitic stainless steel wire generally adopts the preparation process of forging, hot rolling and other hot processing processes combined with fixed die drawing and cold processing processes. The existing processing technology has the following technical deficiencies: Austenitic stainless steel wire has strict requirements on mechanical properties. For wires with an outer diameter of less than 2.0mm, its tensile strength is usually 1695MPa-2500MPa, and 80% is often required to meet the strength requirem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/04B23P15/00
CPCB21C37/047B23P15/00
Inventor 邢健陈昊沈大吉蔡文博李红宇薛晶晶周龙海邹辉
Owner 西安诺博尔稀贵金属材料股份有限公司
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