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Heat treatment process for stainless steel workpieces

A technology for stainless steel and workpieces, which is applied in the field of heat treatment, can solve the problems of large deformation, etc., and achieve the effects of improving fatigue strength, reducing deformation, and protecting surface properties

Inactive Publication Date: 2017-10-20
HEFEI DAZHUO ELECTRIC POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the heat treatment process of stainless steel has the problem of large deformation

Method used

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  • Heat treatment process for stainless steel workpieces
  • Heat treatment process for stainless steel workpieces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A stainless steel workpiece heat treatment process, comprising the following process steps:

[0027] (1) Preheating: the process of preheating the stainless steel workpiece in two stages;

[0028] (2) Normalizing: Put the preheated stainless steel workpiece into a vacuum heating machine for heating, and the vacuum heating machine is heated to 1100°C and kept for 50 minutes;

[0029] (3) Annealing: Transfer the stainless steel workpiece after normalizing to the muffle furnace, reduce the temperature of the stainless steel workpiece to 750°C, and keep it warm for 40min;

[0030] (4) Quenching: transfer the annealed stainless steel workpiece to the quenching furnace for high temperature quenching;

[0031] (5) Cooling: cooling the quenched stainless steel workpiece;

[0032] (6) Tempering: Put the cooled stainless steel workpiece into the quenching furnace for tempering treatment;

[0033] (7) Cooling again: the temperature of the quenching furnace is lowered, and the s...

Embodiment 2

[0042] A stainless steel workpiece heat treatment process, comprising the following process steps:

[0043] (1) Preheating: the process of preheating the stainless steel workpiece in two stages;

[0044] (2) Normalizing: Put the preheated stainless steel workpiece into the vacuum heating machine for heating, and the vacuum heating machine is heated to 1000 ° C, and kept for 40 minutes;

[0045] (3) Annealing: Transfer the stainless steel workpiece after normalizing to the muffle furnace, reduce the temperature of the stainless steel workpiece to 700°C, and keep it warm for 30min;

[0046] (4) Quenching: transfer the annealed stainless steel workpiece to the quenching furnace for high temperature quenching;

[0047] (5) Cooling: cooling the quenched stainless steel workpiece;

[0048] (6) Tempering: Put the cooled stainless steel workpiece into the quenching furnace for tempering treatment;

[0049] (7) Cooling again: the temperature of the quenching furnace is lowered, and ...

Embodiment 3

[0058] A stainless steel workpiece heat treatment process, comprising the following process steps:

[0059] (1) Preheating: the process of preheating the stainless steel workpiece in two stages;

[0060] (2) Normalizing: Put the preheated stainless steel workpiece into a vacuum heating machine for heating, and the vacuum heating machine is heated to 1200 ° C and kept for 60 minutes;

[0061] (3) Annealing: Transfer the stainless steel workpiece after normalizing to the muffle furnace, reduce the temperature of the stainless steel workpiece to 800°C, and keep it warm for 50min;

[0062] (4) Quenching: transfer the annealed stainless steel workpiece to the quenching furnace for high temperature quenching;

[0063] (5) Cooling: cooling the quenched stainless steel workpiece;

[0064] (6) Tempering: Put the cooled stainless steel workpiece into the quenching furnace for tempering treatment;

[0065] (7) Cooling again: the temperature of the quenching furnace is lowered, and the...

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Abstract

The invention discloses a heat treatment process for stainless steel workpieces. The heat treatment process comprises the following process steps: (1) preheating, wherein the stainless steel workpieces undergo a two-stage preheating process; (2) normalizing, wherein the stainless steel workpieces are put into a vacuum heating machine for heating; (3) annealing; (4) quenching, wherein high-temperature quenching is carried out on the stainless steel workpieces in a quenching furnace; (5) cooling; (6) tempering, wherein tempering treatment is carried out on the stainless steel workpieces in the quenching furnace; and (7) re-cooling, wherein re-cooling comprises the steps of pre-cooling and rapid cooling. According to the heat treatment process for the stainless steel workpieces, the hardness and the anti-fatigue strength of the prepared stainless steel workpieces are improved, and meanwhile, the deformation of stainless steel is reduced.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment process 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. 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 the workpi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D1/68C21D1/773C21D1/28
CPCC21D1/18C21D1/28C21D1/68C21D1/773
Inventor 杨自芬
Owner HEFEI DAZHUO ELECTRIC POWER CO LTD
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