Martensitic stainless steel 2Cr13 wire annealing process

A martensitic stainless steel and wire rod annealing technology, which is applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of substandard annealing performance, high annealing tensile strength and hardness, etc., and achieve good annealing effect, short annealing cycle, and good Effect of drawing performance

Inactive Publication Date: 2021-01-29
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, improper annealing process will cause the annealed tensile strength and hardness of the wire to be too high, causing its annealing performance to be substandard

Method used

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  • Martensitic stainless steel 2Cr13 wire annealing process
  • Martensitic stainless steel 2Cr13 wire annealing process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The martensitic stainless steel 2Cr13 wire rod annealing process of embodiment 1 comprises:

[0028] 1. Place the 2Cr13 wire coil in the heat treatment furnace, fill the heat treatment furnace with industrial nitrogen with a purity of 99.99%, raise the temperature of the heat treatment furnace to 810 °C at a heating rate of 80 °C / h, and keep it for 10 hours;

[0029] 2. In the first stage of cooling, the heat treatment furnace is cooled to 780°C at a cooling rate of 20°C / h by means of cooling fan blowing;

[0030] 3. In the second stage of cooling, cool down the heat treatment furnace at a cooling rate of 45°C / h to 650°C by means of blowing cooling by the cooling fan, turn off the industrial nitrogen, and then continue to cool the heat treatment furnace by blowing the cooling fan at a temperature of 30°C / h The cooling rate of h is lowered to 500°C;

[0031] 4. In the third stage of cooling, the 2Cr13 wire rod is coiled out of the furnace and naturally cooled to room te...

Embodiment 2

[0035] The martensitic stainless steel 2Cr13 wire rod annealing process of embodiment 2 comprises:

[0036] 1. Place the 2Cr13 wire coil in a heat treatment furnace, fill the heat treatment furnace with industrial nitrogen with a purity of 99.99%, raise the temperature of the heat treatment furnace to 820 °C at a heating rate of 100 °C / h, and keep it for 9 hours;

[0037] 2. In the first stage of cooling, the heat treatment furnace is cooled to 770°C at a cooling rate of 15°C / h by means of cooling fan blowing;

[0038] 3. In the second stage of cooling, cool down the heat treatment furnace at a cooling rate of 40°C / h to 650°C by means of blowing cooling by the cooling fan, turn off the industrial nitrogen, and then continue to cool the heat treatment furnace by blowing the cooling fan at a temperature of 20°C / h The cooling rate of h is lowered to 500°C;

[0039] 4. In the third stage of cooling, the 2Cr13 wire rod is coiled out of the furnace and naturally cooled to room temp...

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Abstract

The invention discloses a martensitic stainless steel 2Cr13 wire annealing process. The process comprises the following steps of 1, putting a 2Cr13 wire coil into a heat treatment furnace, introducingprotective gas into the heat treatment furnace, then heating the heat treatment furnace to 800-820 DEG C at the heating speed of 80-100 DEG C/h, and maintaining the temperature for 6-10 hours; 2, inthe first cooling stage, cooling the heat treatment furnace to 760-780 DEG C at the cooling speed of 15-20 DEG C/h; 3, in the second cooling stage, cooling the heat treatment furnace to 500 DEG C at the cooling speed of 20-50 DEG C/h; and 4, in the third cooling stage, discharging the 2Cr13 wire coil out of the furnace and naturally cooling the 2Cr13 wire coil to the normal temperature. By means of the martensitic stainless steel 2Cr13 wire annealing process, the martensitic stainless steel 2Cr13 wire can be uniform in annealing performance, and the wire obtained after annealing treatment is uniform in metallographic structure, high in ductility, good in plasticity, low in hardness, lower in tensile strength, better in drawing machining performance and suitable for subsequent plastic machining forming.

Description

technical field [0001] The invention belongs to the technical field of metal wire rod annealing technology, and more specifically relates to a martensitic stainless steel 2Cr13 wire rod annealing technology. Background technique [0002] Martensitic stainless steel 2Cr13 wire is mainly used for steam turbine blades, tableware, surgical equipment, etc., and requires materials with low tensile strength and good drawing performance. The martensitic stainless steel wire rod undergoes structural transformation during the cooling process after hot rolling, from austenite to martensite. However, downstream users need to draw the wire rod in the subsequent processing process, so it is necessary to anneal the martensitic stainless steel 2Cr13 wire rod to complete the transformation of martensite to ferrite + carbide, thereby reducing the tensile strength, which is beneficial Conducive to the user's drawing processing. However, an improper annealing process will cause the annealed t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C21D1/74C21D6/00C21D9/52C21D11/00
CPCC21D1/26C21D1/74C21D6/002C21D9/525C21D11/00C21D11/005
Inventor 李华刚郑艳华于玉柱
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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