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Nitriding treatment process on the surface of tooth plate

A technology of surface nitriding and treatment process, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problem of easily appearing white layer, mesh, needle-like nitride, affecting the service life of the tooth plate, Problems such as low nitriding hardness of the tooth plate, to achieve the effect of improving fatigue resistance, increasing service life, and high fatigue limit

Active Publication Date: 2021-03-16
HAIYAN JINGBIN HARDWARE PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The service life of the tooth plate after nitriding treatment is significantly improved, so the nitriding treatment of the tooth plate has been widely used in the production process. At present, the traditional process of surface nitriding treatment on the market is unstable, which often results in low nitriding hardness of the tooth plate. , shallow depth, uneven hardness, not dense nitriding layer, and prone to defects such as white layer, mesh, needle nitride, etc., which seriously affect the service life of the dental plate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the nitriding treatment process on the surface of the dental plate, comprising the following steps:

[0027] 1) Preparation before processing: Clean the surface of the workpiece to ensure that there is no dust or impurities on the surface of the workpiece; place the workpiece in the furnace, and keep a distance of 6mm between the workpieces; test the water pressure and air pressure, and ensure the water pressure The setting range of the air pressure is 0.2Mpa, and the setting range of the air pressure is 0.3Mpa.

[0028] 2) Vacuuming: vacuumize the furnace to 0.05mbar and keep it for 5 minutes; (function: remove the air in the furnace to prevent the workpiece from being oxidized when the subsequent process is heated);

[0029] 3) Heating: Heating the furnace, heating the furnace to 490°C and keeping it for 5 minutes;

[0030] 4) Reheating: Continue to heat the furnace to make the core temperature of the workpiece reach 510°C and keep it for 20 minutes;

...

Embodiment 2

[0039] Embodiment 2: the nitriding treatment process on the surface of the dental plate, comprising the following steps:

[0040] 1) Preparation before processing: Clean the surface of the workpiece to ensure that there is no dust or impurities on the surface of the workpiece; place the workpiece in the furnace, and keep a distance of 5mm between the workpieces; test the water pressure and air pressure, and ensure the water pressure The setting range of the air pressure is 0.3Mpa, and the setting range of the air pressure is 0.3Mpa.

[0041] 2) Vacuuming: Vacuumize the furnace to 0.02mbar and keep it for 10min; (function: remove the air in the furnace to prevent oxidation of the workpiece during subsequent process heating);

[0042] 3) Heating: Heating the furnace, heating the furnace to 495°C and keeping it for 10 minutes;

[0043]4) Reheating: Continue heating in the furnace to make the core temperature of the workpiece reach 515°C and keep it for 30 minutes;

[0044] 5) V...

Embodiment 3

[0052] Embodiment 3: the nitriding treatment process on the surface of the dental plate, comprising the following steps:

[0053] 1) Preparation before processing: Clean the surface of the workpiece to ensure that there is no dust or impurities on the surface of the workpiece; place the workpiece in the furnace, and keep a distance of 10mm between the workpieces; test the water pressure and air pressure, and ensure the water pressure The setting of the air pressure is 0.4Mpa, and the setting of the air pressure is 0.4Mpa.

[0054] 2) Vacuuming: vacuumize the furnace to 0.04mbar and keep it for 8 minutes; (function: remove the air in the furnace to prevent the workpiece from being oxidized when the subsequent process is heated);

[0055] 3) Heating: Heating the furnace, heating the furnace to 485°C and keeping it for 8 minutes;

[0056] 4) Reheating: Continue to heat the furnace to make the core temperature of the workpiece reach 505°C and keep it for 25 minutes;

[0057] 5) ...

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PUM

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Abstract

The invention discloses a dental plate surface nitriding technology, and relates to the technical field of workpiece nitriding treatment. The technology comprises the steps of 1) preparing before treatment, 2) vacuumizing, 3) heating, 4) reheating, 5) vacuumizing, 6) surface activating, 7) vacuumizing, 8) decomposing through ammonia gas, 9) nitriding, 10) vacuumizing, 11) blackening, and 12) cooling. The technology has the beneficial effects that the fatigue resistance of a workpiece is improved; high pressure stress is generated in a nitriding layer, so that the fatigue limit of the workpieceis high, and the sensitivity of the workpiece is low under the effect of alternating load; and moreover, the fatigue limit of the workpiece subjected to alternating load can be increased by 200%.

Description

technical field [0001] The invention relates to the technical field of workpiece nitriding treatment technology, in particular to the nitriding treatment technology of the surface of a tooth plate. Background technique [0002] The service life of the tooth plate after nitriding treatment is significantly improved, so the nitriding treatment of the tooth plate has been widely used in the production process. At present, the traditional process of surface nitriding treatment on the market is unstable, which often results in low nitriding hardness of the tooth plate. , shallow depth, uneven hardness, not dense nitriding layer, and prone to defects such as white layer, mesh, and needle-like nitrides, which seriously affect the service life of the dental plate. Contents of the invention [0003] Aiming at the problems existing in the prior art, the invention provides a nitriding treatment process on the surface of the dental plate that can improve the surface hardness, wear res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/34C23C8/02
CPCC23C8/02C23C8/34
Inventor 罗玉竹
Owner HAIYAN JINGBIN HARDWARE PROD CO LTD
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