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Heat treatment method for stainless steel workpieces

A heat treatment method, stainless steel technology, applied in the field of heat treatment, can solve problems such as strength and toughness that cannot meet production requirements, insufficient hardness, etc., and achieve the effects of good hardness, enhanced oxidation resistance, long toughness and wear resistance

Inactive Publication Date: 2018-11-06
合肥市旺友门窗有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the workpieces of stainless steel heat treatment have insufficient hardness, and the strength and toughness cannot meet the production requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The stainless steel workpiece heat treatment method of the present embodiment comprises the following steps:

[0031] (1) Coating: Coating the surface of the stainless steel workpiece with a heat treatment protective coating;

[0032] (2) Preheating: put the stainless steel workpiece coated with heat treatment protective coating into the vacuum heating machine, and perform two stages of preheating;

[0033] (3) Normalizing: Put the preheated stainless steel workpiece into the normalizing furnace, raise the temperature to 720°C, keep it for 2.5h, then heat it to 1150°C, and keep it for 1h;

[0034] (4) Annealing: Transfer the normalized stainless steel workpiece to the muffle furnace, lower the temperature of the stainless steel workpiece to 600°C, and keep it warm for 30 minutes;

[0035] (5) Quenching: transfer the annealed stainless steel workpiece to the quenching furnace for high temperature quenching;

[0036] (6) Cooling: cooling the quenched stainless steel wor...

Embodiment 2

[0048] The stainless steel workpiece heat treatment method of the present embodiment comprises the following steps:

[0049] (1) Coating: Coating the surface of the stainless steel workpiece with a heat treatment protective coating;

[0050] (2) Preheating: put the stainless steel workpiece coated with heat treatment protective coating into the vacuum heating machine, and perform two stages of preheating;

[0051] (3) Normalizing: Put the preheated stainless steel workpiece into the normalizing furnace, raise the temperature to 840°C, keep it for 3 hours, then heat it to 1250°C, and keep it for 2 hours;

[0052] (4) Annealing: Transfer the normalized stainless steel workpiece to the muffle furnace, lower the temperature of the stainless steel workpiece to 700°C, and keep it warm for 50 minutes;

[0053] (5) Quenching: transfer the annealed stainless steel workpiece to the quenching furnace for high temperature quenching;

[0054] (6) Cooling: cooling the quenched stainless s...

Embodiment 3

[0066] The stainless steel workpiece heat treatment method of the present embodiment comprises the following steps:

[0067] (1) Coating: Coating the surface of the stainless steel workpiece with a heat treatment protective coating;

[0068] (2) Preheating: put the stainless steel workpiece coated with heat treatment protective coating into the vacuum heating machine, and perform two stages of preheating;

[0069] (3) Normalizing: Put the preheated stainless steel workpiece into the normalizing furnace, raise the temperature to 780°C, keep it for 2.8h, then heat it to 1200°C, and keep it for 1.5h;

[0070] (4) Annealing: Transfer the normalized stainless steel workpiece to the muffle furnace, lower the temperature of the stainless steel workpiece to 650°C, and keep it warm for 40 minutes;

[0071] (5) Quenching: transfer the annealed stainless steel workpiece to the quenching furnace for high temperature quenching;

[0072] (6) Cooling: cooling the quenched stainless steel wor...

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Abstract

The invention discloses a heat treatment method for stainless steel workpieces. The method comprises the process steps of: (1) coating: heat treatment protection paint is coated on the surfaces of thestainless steel workpieces; (2) preheating: the stainless steel workpieces are put in a vacuum heating machine for two-section preheating process; (3) normalization: the stainless steel workpieces are put in a normalizing furnace for heating; (4) annealing; (5) quenching: the high-temperature quenching is performed in a quenching furnace; (6) cooling; (7) tempering: the tempering is performed inthe quenching furnace; and (8) recooling. The stainless steel workpieces prepared by the heat treatment method for the stainless steel workpieces are excellent in hardness, toughness and wear resistance and longer in service life.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment method for stainless steel workpieces. Background technique [0002] The heat treatment of stainless steel is to heat it in a certain medium to a suitable temperature, and keep it at this temperature for a certain period of time, and then cool it in a different medium at different speeds, by changing its surface or internal microstructure. A process that controls its properties. [0003] Stainless steel heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing techniques, heat treatment generally does not change the shape and overall chemical composition of the workpiece, but changes the microstructure inside the workpiece or changes the chemical composition on the surface of the workpiece. , to give or improve the performance of the workpiece. It is characterized by improving the intrinsic quality of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00C21D1/70C21D1/28C21D1/26C21D1/18
CPCC21D6/00C21D1/18C21D1/26C21D1/28C21D1/70
Inventor 朱明超
Owner 合肥市旺友门窗有限公司
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