Heat treatment method for austenite stainless steel wire

A technology of austenitic stainless steel and heat treatment method, which is applied in the direction of heat treatment furnace, heat treatment equipment, improvement of process efficiency, etc. It can solve the problems that steel wire cannot meet the ideal performance requirements and the annealing temperature is unreasonable, so as to improve the quality of steel wire and production Efficiency, optimized annealing temperature, effect of stable shape

Inactive Publication Date: 2017-11-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, most enterprises use direct annealing in the drawing and annealing process of stainless steel wire, and the selection

Method used

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  • Heat treatment method for austenite stainless steel wire
  • Heat treatment method for austenite stainless steel wire
  • Heat treatment method for austenite stainless steel wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Austenitic stainless steel wire heat treatment process flow chart such as figure 1 As shown,

[0044] A heat treatment process for austenitic stainless steel wire, the process steps are as follows:

[0045] 1) Raw material inspection: check the surface for defects such as cracks, scratches, burrs, etc., and detect the ovality of the raw materials; detect the tensile strength and elongation of the raw materials;

[0046] 2) Pickling: The company uses sulfuric acid electrolytic pickling. Through the constantly changing current, the steel wire is electrolytically corroded, and gas is generated on the surface of the steel wire, thereby removing the impurities remaining on the surface of the steel wire, such as the surface film or lubricating powder;

[0047] 3) Water washing: rinse off the residual acid in the water washing section and blow dry;

[0048] 4) Preheating: Heat the washed and blow-dried steel wire to 450℃~500℃ and keep it for 3~5min. In addition to drying the steel wire,...

Embodiment 2

[0055] according to figure 2 The shown process heat treatment of 304 austenitic stainless steel after drawing hardening. First, check the hard wire of 304 austenitic stainless steel wire after drawing hardening, check whether the surface has defects such as cracks, scratches, burrs, etc., check the ovality of the raw material; detect the tensile strength and elongation of the raw material; Then, electrolytic pickling with sulfuric acid is used to make the steel wire electrolytically eroded through the constantly changing current, generating gas on the surface of the steel wire, thereby removing the impurities remaining on the surface of the steel wire, such as surface film or lubricating powder; after pickling, in the water washing section Rinse the residual acid solution in the blast furnace and blow dry; preheat the washed and blow-dried 304 austenitic stainless steel wire to 450℃ for 3min; send the preheated steel wire into the annealing furnace at 1050℃, It is 4m / min. In o...

Embodiment 3

[0061] according to image 3 The shown process heats the 316L austenitic stainless steel wire after drawing hardening. First, inspect the hard wire of 316L austenitic stainless steel wire after drawing hardening to check whether the surface has defects such as cracks, scratches, burrs, etc., and inspect the ovality of the raw material; detect the tensile strength and elongation of the raw material; Then, electrolytic pickling with sulfuric acid is used to make the steel wire electrolytically eroded through the constantly changing current, generating gas on the surface of the steel wire, thereby removing the impurities remaining on the surface of the steel wire, such as surface film or lubricating powder; after pickling, in the water washing section Rinse the remaining acid solution in the blast furnace and blow dry; preheat the washed and blow-dried 316L austenitic stainless steel wire to 450°C for 3 minutes; send the preheated steel wire into the annealing furnace at 1050°C, an...

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Abstract

The invention mainly belongs to the field of metal smelting and particularly relates to a heat treatment method for an austenite stainless steel wire. The method comprises the steps that a material is pre-heated before annealing, and meanwhile the suitable annealing temperature is selected. The residual stress after drawing of the steel wire can be eliminated, the cold workability of the steel wire is improved, the shape of the steel wire is stabilized, meanwhile, the advantages of high technological practicability, low cost and the like are achieved, and the quality and production efficiency of the steel wire are improved significantly.

Description

Technical field [0001] The invention mainly belongs to the field of metal smelting, and specifically relates to a heat treatment of austenitic stainless steel wire. Background technique [0002] Wire drawing is a cold deformation process, accompanied by violent work hardening. In order to improve the cold working performance of austenitic stainless steel, prevent defects such as fractures during processing, and to obtain better corrosion resistance, it must be The stainless steel undergoes appropriate heat treatment to reduce its hardness and restore its plasticity, so that the steel wire has good comprehensive mechanical properties. Commonly used heat treatment methods include solution heat treatment, stress relief heat treatment, and stabilization treatment. In this experiment, solution heat treatment is mainly used. [0003] Austenitic stainless steel is the most widely used stainless steel with the most types of grades. Its matrix structure is austenitic, non-magnetic and has ...

Claims

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Application Information

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IPC IPC(8): C21D9/52C21D1/74C21D1/30
CPCC21D1/30C21D1/74C21D9/525Y02P10/20
Inventor 宋仁伯谭瑶于浩男王天一
Owner UNIV OF SCI & TECH BEIJING
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