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Surface treatment method of steel wire for needle bearing

A surface treatment, needle roller bearing technology, applied in coatings, anti-corrosion coatings, etc., can solve problems such as poor lubrication, achieve good lubrication effect, solve poor lubrication, and bond firmly

Active Publication Date: 2022-03-01
凯明(常州)新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is: to overcome the deficiencies in the prior art, provide a kind of surface treatment method of steel wire for needle roller bearings, the coating solution adopted in this treatment method is due to adding trisodium nitrilotriacetate and methylbenzene Triazole or benzotriazole makes the prepared coating firmly bonded to the metal surface, does not fall off during drawing with a large area reduction rate, and always maintains a good lubricating effect, which solves the problem of poor lubrication in large drawing quantities The problem

Method used

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  • Surface treatment method of steel wire for needle bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A surface treatment method for steel wires for needle bearings, comprising the following steps: pickling-rinsing-neutralization-coating-drying; specifically:

[0052] 1) Immerse the steel wire in a hydrochloric acid solution with a temperature of 40-50°C and a concentration of 120-200g / L for 30-60 minutes to remove the oxidized substances on the surface;

[0053] 2) Then use 0.75-1.2MPa high-pressure water to wash off the acid attached to the surface of the material;

[0054] 3) neutralize with 0.5-2wt% NaOH solution for 30-60s;

[0055] 4) Soak the steel wire treated in step 3) in the coating solution for 3 minutes, and the temperature of the coating solution is 90-100° C.;

[0056] 5) Dry the steel wire in a drying tank at 120-150°C for 10-15 minutes;

[0057] The mass percentage composition of the coating solution that adopts in the coating process is as follows:

[0058] Borax Na 2 B 4 o 7 .10H 2 O: 20%;

[0059] Trisodium phosphate dodecahydrate: 2%;

[00...

Embodiment 2

[0068] A surface treatment method for steel wires for needle bearings, comprising the following steps: pickling-rinsing-neutralization-coating-drying; specifically:

[0069] 1) Immerse the steel wire in a hydrochloric acid solution with a temperature of 40-50°C and a concentration of 120-200g / L for 30-60 minutes to remove the oxidized substances on the surface;

[0070] 2) Then use 0.75-1.2MPa high-pressure water to wash off the acid attached to the surface of the material;

[0071] 3) neutralize with 0.5-2wt% NaOH solution for 30-60s;

[0072] 4) Soak the steel wire treated in step 3) in the coating solution for 3 minutes, and the temperature of the coating solution is 90-100° C.;

[0073] 5) Dry the steel wire in a drying tank at 120-150°C for 10-15 minutes;

[0074] The mass percentage composition of the coating solution that adopts in the coating process is as follows:

[0075] Borax Na 2 B 4 o 7 .10H 2 O: 20%;

[0076] Trisodium phosphate dodecahydrate: 2%;

[00...

Embodiment 3

[0085] A surface treatment method for steel wires for needle bearings, comprising the following steps: pickling-rinsing-neutralization-coating-drying; specifically:

[0086] 1) Immerse the steel wire in a hydrochloric acid solution with a temperature of 40-50°C and a concentration of 120-200g / L for 30-60 minutes to remove the oxidized substances on the surface;

[0087] 2) Then use 0.75-1.2MPa high-pressure water to wash off the acid attached to the surface of the material;

[0088] 3) neutralize with 0.5-2wt% NaOH solution for 30-60s;

[0089] 4) Soak the steel wire treated in step 3) in the coating solution for 3 minutes, and the temperature of the coating solution is 90-100° C.;

[0090] 5) Dry the steel wire in a drying tank at 120-150°C for 10-15 minutes;

[0091] The mass percentage composition of the coating solution that adopts in the coating process is as follows:

[0092] Borax Na 2 B 4 o 7 .10H 2 O: 15%;

[0093] Trisodium phosphate dodecahydrate: 1.5%;

[...

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Abstract

The invention relates to the technical field of metal processing, in particular to a surface treatment method of a steel wire for a needle bearing. The treatment method comprises the following steps of acid pickling, flushing, neutralizing, coating and drying. A coating solution adopted in the step of coating comprises the following components in percentage by mass: 15-20% of borax Na2B4O7. 10H2O, 10-20% of Na2B4O7. 10H2O and the balance of water. 1.5 to 2 percent of trisodium phosphate dodecahydrate; the content of the methyl benzotriazole or the benzotriazole is 0.02 to 0.05 percent; 0.01 to 0.03 percent of trisodium nitrilotriacetate; and the balance of water. According to the surface treatment method of the steel wire for the needle bearing, the prepared wiredrawing coating is a physical adsorption layer, no other chemical substances are generated in the treatment process, no hazardous waste is generated, and the problem that slag removal and hazardous waste treatment are needed in the original phosphorus saponification process is solved.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a method for surface treatment of steel wires for needle roller bearings. Background technique [0002] The needle roller refers to the rotating body on the needle roller bearing. It is mainly used in various bearings. It is a roller bearing with cylindrical rollers. The rollers are thin and long like needles. This kind of bearing has a high load bearing capacity. , the radial structure is compact, and the diameter of the finished steel wire used by the small needle roller is generally very small. The minimum diameter of the bearing steel wire rod that can be stably produced by the rolling mills of domestic steel mills is 5.0mm. According to the traditional process, multi-pass drawing is required. And annealing, long production cycle, high cost. [0003] In order to reduce the production cost and shorten the production cycle, it is necessary to adopt a drawing process w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/08C09D7/20C09D7/61C09D7/63
CPCC09D1/00C09D7/61C09D7/63C09D7/20C09D5/08Y02P10/20
Inventor 韩冰韩红斐
Owner 凯明(常州)新材料科技有限公司
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