Oil quenched spring steel wire

Abstract

This invention relates to an oil-quenched snap ring steel wire, comprising the following preparation steps: preparing a snap ring steel wire blank, the blank containing the following elements in percentage: 3-5% C, 1-4% Si, 5-7% Cr, 5-8% V, 0.5-1% P, 0.3-0.5% S, and Fe occupying the remaining portion; heat treatment of the snap ring steel wire blank before drawing; the snap ring steel wire blank undergoes a drawing lubricating powder bath before entering the drawing die for drawing; deoxidation treatment: a deoxidation bath is prepared, and the drawn steel wire enters the deoxidation bath for surface deoxidation treatment; organic solvent protective layer treatment: an organic solvent bath is prepared, the organic solvent bath is filled with organic solvent, the organic solvent including -SH thiol organic compound salts, and NaOH or Na2CO3 as a supporting electrolyte; the deoxidation-treated steel wire enters the organic solvent bath to form a surface oxide layer; oil quenching treatment is performed, and the steel wire is inspected for flaws, completing the preparation of the snap ring steel wire.

Description

Technical Field

[0001] This invention relates to steel wire preparation technology and equipment, specifically, to an oil-quenched snap ring steel wire. Background Technology

[0002] Precision snap rings are widely used in five major sectors: automotive / new energy vehicle electric drive systems, industrial precision transmission, high-end home appliances, medical / semiconductor systems, and aerospace. Among them, electric motors, transmissions, and solenoid valves for new energy vehicles are the biggest growth engines, exhibiting application upgrade characteristics of "high-end localization, miniaturization, oxidation-free, and long lifespan".

[0003] Some precision snap rings operate under extremely harsh conditions, including high-frequency reciprocating motion, high temperature, high stress, and large vibration, while requiring a fatigue life of ≥10 years. 7 No breakage occurred; when an oxide layer exists on a precision snap ring, the oxide layer is brittle and easily falls off, causing stress concentration, which leads to a decrease in strength, a reduction in elasticity, inconsistent snap ring tightness, and assembly failure.

[0004] Therefore, an oil-quenched snap ring wire is provided to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an oil-quenched snap ring steel wire.

[0006] The present invention achieves the above objectives through the following technical solutions: A type of oil-quenched snap ring steel wire, the preparation steps of which include: 1) Prepare the snap ring wire blank. The snap ring wire blank contains the following elements, expressed as a percentage: 3-5% C, 1-4% Si, 5-7% Cr, 5-8% V, 0.5-1% P, 0.3-0.5% S, and Fe accounting for the remaining content; the spring clip steel wire blank undergoes heat treatment before drawing and forming. 2) Configure a drawing lubricant powder tank. The drawing lubricant powder is placed in the drawing lubricant powder tank. After the snap ring steel wire blank passes through the drawing lubricant powder tank, it enters the drawing forming die to achieve drawing forming. 3) Deoxidation treatment: A deoxidation layer desulfurization tank is prepared and filled with a deoxidation layer desulfurization solvent, which includes zirconium hexafluoride 50g / L-150g / L, sodium molybdate 20g / L-30g / L, fatty acid salt 10g / L-20g / L, 25% nitric acid 10g / L-20g / L, ethylene glycol 10g / L-20g / L, triethanolamine 5g / L-10g / L, and deionized water solvent. After being drawn and shaped, the steel wire is placed in a deoxidation bath for surface deoxidation treatment. 4) Organic solvent protective layer treatment: An organic solvent tank is prepared and filled with organic solvent, including -SH thiol organic compound salts and NaOH or Na2CO3 as supporting electrolytes. The steel wire that has undergone de-oxidation treatment is then placed in a solvent bath to form a surface oxide layer. 5) Oil quenching treatment and wire flaw detection are performed to complete the preparation of the snap ring wire.

[0007] Furthermore, the heat treatment before drawing includes heating at 200-350°C for 40-50 minutes in an inert gas environment, followed by annealing. The heating equipment can be a closed furnace.

[0008] Furthermore, the length of the drawing lubricant powder pool shall not be less than 80cm.

[0009] Furthermore, the drawing lubricant pool is maintained at 80-120°C during the threading process of the snap ring wire blank.

[0010] Furthermore, the length of the oxidation layer pool is 130-180cm.

[0011] Furthermore, the oxide layer pool is maintained at a temperature of 70-90°C during the deoxide layer treatment process.

[0012] Furthermore, the length of the organic solvent pool is 50-70cm.

[0013] Furthermore, the organic solvent bath is kept at a temperature of 60-70°C during the organic solvent protective layer treatment process.

[0014] Compared with the prior art, the present invention can effectively remove the oxide layer on the surface of oil-quenched snap ring steel wire, effectively ensuring the performance of oil-quenched snap ring steel wire. Detailed Implementation

[0015] Example 1:

[0016] A type of oil-quenched snap ring steel wire, the preparation steps of which include: 1) Prepare the snap ring wire blank. The snap ring wire blank contains the following elements, expressed as a percentage: 3% C, 1% Si, 5% Cr, 5% V, 0.5% P, 0.3% S, and Fe accounting for the remaining content; the spring clip steel wire blank undergoes heat treatment before drawing and forming. 2) Configure a drawing lubricant powder tank. The drawing lubricant powder is placed in the drawing lubricant powder tank. After the snap ring steel wire blank passes through the drawing lubricant powder tank, it enters the drawing forming die to achieve drawing forming. 3) Deoxidation treatment: A deoxidation layer desulfurization tank is prepared and filled with a deoxidation layer desulfurization solvent, which includes 50 g / L zirconium hexafluoride, 20 g / L sodium molybdate, 10 g / L fatty acid salt, 10 g / L 25% nitric acid, 10 g / L ethylene glycol, 5 g / L triethanolamine, and deionized water solvent. After being drawn and shaped, the steel wire is placed in a deoxidation bath for surface deoxidation treatment. 4) Organic solvent protective layer treatment: An organic solvent tank is prepared and filled with organic solvent, including -SH thiol organic compound salts and NaOH or Na2CO3 as supporting electrolytes. The steel wire that has undergone de-oxidation treatment is then placed in a solvent bath to form a surface oxide layer. 5) Oil quenching treatment and wire flaw detection are performed to complete the preparation of the snap ring wire.

[0017] in: Heat treatment before drawing includes heating at 200°C for 40 minutes in an inert gas environment, followed by annealing. A closed furnace can be used for heating.

[0018] The length of the drawing lubricant powder pool shall not be less than 80cm.

[0019] The drawing lubricant pool is kept at 80°C during the threading process of the snap ring wire blank.

[0020] The length of the oxidation layer pool is 130cm.

[0021] The oxide layer bath is kept at a temperature of 70°C during the deoxide treatment process.

[0022] The length of the organic solvent tank is 50cm.

[0023] The organic solvent bath is kept at 60°C during the organic solvent protective layer treatment process.

[0024] Example 2:

[0025] A type of oil-quenched snap ring steel wire, the preparation steps of which include: 1) Prepare the snap ring wire blank. The snap ring wire blank contains the following elements, expressed as a percentage: 5% C, 4% Si, 7% Cr, 8% V, 1% P, 0.5% S, and Fe accounting for the remaining content; the spring clip steel wire blank undergoes heat treatment before drawing and forming. 2) Configure a drawing lubricant powder tank. The drawing lubricant powder is placed in the drawing lubricant powder tank. After the snap ring steel wire blank passes through the drawing lubricant powder tank, it enters the drawing forming die to achieve drawing forming. 3) Deoxidation treatment: A deoxidation layer desulfurization tank is prepared and filled with a deoxidation layer desulfurization solvent, which includes 150 g / L zirconium hexafluoride, 30 g / L sodium molybdate, 20 g / L fatty acid salt, 20 g / L 25% nitric acid, 20 g / L ethylene glycol, 10 g / L triethanolamine, and deionized water solvent. After being drawn and shaped, the steel wire is placed in a deoxidation bath for surface deoxidation treatment. 4) Organic solvent protective layer treatment: An organic solvent tank is prepared and filled with organic solvent, including -SH thiol organic compound salts and NaOH or Na2CO3 as supporting electrolytes. The steel wire that has undergone de-oxidation treatment is then placed in a solvent bath to form a surface oxide layer. 5) Oil quenching treatment and wire flaw detection are performed to complete the preparation of the snap ring wire.

[0026] in: Heat treatment before drawing includes heating at 350°C for 40-50 minutes in an inert gas environment, followed by annealing. A closed furnace can be used for heating.

[0027] The length of the drawing lubricant powder pool shall not be less than 80cm.

[0028] The drawing lubricant pool is kept at 120°C during the threading process of the snap ring wire blank.

[0029] The length of the oxidation layer pool is 180cm.

[0030] The oxide layer bath is kept at a temperature of 90°C during the deoxide treatment process.

[0031] The length of the organic solvent tank is 70cm.

[0032] The organic solvent bath is kept at 70°C during the organic solvent protective layer treatment process.

[0033] Example 3:

[0034] A type of oil-quenched snap ring steel wire, the preparation steps of which include: 1) Prepare the snap ring wire blank. The snap ring wire blank contains the following elements, expressed as a percentage: 4% C, 3% Si, 6% Cr, 6.5% V, 0.75% P, 0.4% S, and Fe accounting for the remaining content; the spring clip steel wire blank undergoes heat treatment before drawing and forming. 2) Configure a drawing lubricant powder tank. The drawing lubricant powder is placed in the drawing lubricant powder tank. After the snap ring steel wire blank passes through the drawing lubricant powder tank, it enters the drawing forming die to achieve drawing forming. 3) Deoxidation treatment: A deoxidation layer desulfurization tank is prepared and filled with a deoxidation layer desulfurization solvent, which includes 100 g / L zirconium hexafluoride, 25 g / L sodium molybdate, 15 g / L fatty acid salt, 15 g / L 25% nitric acid, 15 g / L ethylene glycol, 7.5 g / L triethanolamine, and deionized water solvent. After being drawn and shaped, the steel wire is placed in a deoxidation bath for surface deoxidation treatment. 4) Organic solvent protective layer treatment: An organic solvent tank is prepared and filled with organic solvent, including -SH thiol organic compound salts and NaOH or Na2CO3 as supporting electrolytes. The steel wire that has undergone de-oxidation treatment is then placed in a solvent bath to form a surface oxide layer. 5) Oil quenching treatment and wire flaw detection are performed to complete the preparation of the snap ring wire.

[0035] in: The heat treatment before drawing includes heating at 285°C for 45 minutes in an inert gas environment, followed by annealing. The heating equipment can be a closed furnace.

[0036] The length of the drawing lubricant powder pool shall not be less than 80cm.

[0037] The drawing lubricant pool is kept at 100°C during the threading process of the snap ring wire blank.

[0038] The length of the oxidation layer pool is 150cm.

[0039] The oxide layer bath is kept at a temperature of 80°C during the deoxide treatment process.

[0040] The length of the organic solvent tank is 60cm.

[0041] The organic solvent bath is kept at 65°C during the organic solvent protective layer treatment process.

[0042] Compared with the prior art, the present invention can effectively remove the oxide layer on the surface of oil-quenched snap ring steel wire, effectively ensuring the performance of oil-quenched snap ring steel wire.

[0043] The above are merely some embodiments of the present invention. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of the present invention, and all such modifications and improvements fall within the scope of protection of the present invention.

Claims

1. An oil-quenched snap ring steel wire, characterized in that: The preparation steps include: 1) Prepare the snap ring wire blank. The snap ring wire blank contains the following elements, expressed as a percentage: 3-5% C, 1-4% Si, 5-7% Cr, 5-8% V, 0.5-1% P, 0.3-0.5% S, and Fe accounting for the remaining content; the spring clip steel wire blank undergoes heat treatment before drawing and forming. 2) Configure a drawing lubricant powder tank. The drawing lubricant powder is placed in the drawing lubricant powder tank. After the snap ring steel wire blank passes through the drawing lubricant powder tank, it enters the drawing forming die to achieve drawing forming. 3) Deoxidation treatment: A deoxidation layer desulfurization tank is prepared and filled with a deoxidation layer desulfurization solvent, which includes zirconium hexafluoride 50g / L-150g / L, sodium molybdate 20g / L-30g / L, fatty acid salt 10g / L-20g / L, 25% nitric acid 10g / L-20g / L, ethylene glycol 10g / L-20g / L, triethanolamine 5g / L-10g / L, and deionized water solvent. After being drawn and shaped, the steel wire is placed in a deoxidation bath for surface deoxidation treatment. 4) Organic solvent protective layer treatment: An organic solvent tank is prepared and filled with organic solvent, including -SH thiol organic compound salts and NaOH or Na2CO3 as supporting electrolytes. The steel wire that has undergone de-oxidation treatment is then placed in a solvent bath to form a surface oxide layer. 5) Oil quenching treatment and wire flaw detection are performed to complete the preparation of the snap ring wire.

2. The oil-quenched spring wire according to claim 1, characterized in that: Heat treatment before drawing includes heating at 200-350°C for 40-50 minutes in an inert gas environment, followed by annealing. A closed furnace can be used for heating.

3. The oil-quenched spring clip wire according to claim 1 or 2, characterized in that: The length of the drawing lubricant powder pool shall not be less than 80cm.

4. The oil-quenched spring wire according to claim 3, characterized in that: The drawing lubricant pool is kept at 80-120°C during the threading process of the snap ring wire blank.

5. The oil-quenched spring wire according to claim 4, characterized in that: The length of the oxidation layer pool is 130-180cm.

6. The oil-quenched spring wire according to claim 5, characterized in that: During the deoxidation process, the temperature in the oxide layer pool is maintained at 70-90°C.

7. The oil-quenched spring clip wire according to claim 6, characterized in that: The length of the organic solvent tank is 50-70cm.

8. The oil-quenched spring clip wire according to claim 7, characterized in that: The organic solvent bath is kept at a temperature of 60-70°C during the organic solvent protective layer treatment process.