Preparation process of high hardness stainless steel

A preparation process, stainless steel technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of blurred car lines, affecting appearance requirements, etc., to prevent uneven hardness and white brightness , uniform gasification, and the effect of improving surface hardness

Active Publication Date: 2017-05-10
HAMA NAKA MOTOGAWA METAL PROD KUNSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to requirements, the overall fasteners are white and bright, and the head needs to be stitched; but according to the standard hardness value produced by the existing process, the stitching stitches produced by the car repair are blurred, which affects the appearance requirements

Method used

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  • Preparation process of high hardness stainless steel
  • Preparation process of high hardness stainless steel
  • Preparation process of high hardness stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation process of high-hardness stainless steel comprises the following specific steps:

[0025] Step 1): Warm the cleaning water to 70°C, add a water-soluble degreasing agent to the water, the amount of the water-soluble degreasing agent is 50ML / L, put the stainless steel material into the aqueous solution, and clean it with ultrasonic vibration for 10 minutes. The sonic oscillation frequency is 48HZ;

[0026] Step 2): Remove the surface film of the stainless steel material obtained in step 1) in cleaning equipment equipped with 8% hydrochloric acid for 2 minutes, and the frequency of pulling the net is 10 / minute, and then wash the overflow with water again;

[0027] Step 3): Place the stainless steel material obtained in step 2) in a heating dehydrator, dehydrate for 5 minutes, set the temperature at 80°C for 1 minute, and pull the mesh at a frequency of 8 / time;

[0028] Step 4): Put the cleaned stainless steel material into the self-made baking tray and sprea...

Embodiment 2

[0032] A preparation process of high-hardness stainless steel comprises the following specific steps:

[0033] Step 1): Warm the cleaning water to 73°C, add a water-soluble degreasing agent to the water, the amount of the water-soluble degreasing agent is 65ML / L, put the stainless steel material into the aqueous solution, and clean it with ultrasonic vibration for 12 minutes. The sonic oscillation frequency is 48HZ;

[0034] Step 2): Remove the surface film of the stainless steel material obtained in step 1) in a cleaning device equipped with 8% hydrochloric acid for 4 minutes, and the frequency of pulling the net is 10 / minute, and then wash the overflow with water again;

[0035] Step 3): Place the stainless steel material obtained in step 2) in a heating dehydrator, dehydrate for 5 minutes, set the temperature at 80°C for 2 minutes, and pull the mesh at a frequency of 8 / time;

[0036] Step 4): Put the cleaned stainless steel material into the self-made baking tray and sprea...

Embodiment 3

[0040] A preparation process of high-hardness stainless steel comprises the following specific steps:

[0041] Step 1): Warm the cleaning water to 75°C, add a water-soluble degreasing agent to the water, the amount of the water-soluble degreasing agent is 80ML / L, put the stainless steel material into the aqueous solution, and clean it with ultrasonic vibration for 15 minutes. The sonic oscillation frequency is 48HZ;

[0042] Step 2): Remove the surface film of the stainless steel material obtained in step 1) in cleaning equipment equipped with 8% hydrochloric acid for 5 minutes, and the frequency of pulling the net is 10 / minute, and then wash the overflow with water again;

[0043] Step 3): Place the stainless steel material obtained in step 2) in a heating dehydrator, dehydrate for 5 minutes, set the temperature at 80°C for 2 minutes, and pull the mesh at a frequency of 8 / time;

[0044] Step 4): Put the cleaned stainless steel material into the homemade baking tray and sprea...

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Abstract

The invention belongs to the technical field of alloy treatment and particularly relates to a preparation process of high hardness stainless steel. The preparation process of the high hardness stainless steel comprises the following specific steps of (1): heating cleaning water to 70-75 DEG C, adding a water soluble degreasant in the water, putting a stainless steel material in the water, and cleaning through ultrasonic agitation; (2): removing a surface membrane of the stainless steel material obtained in the step (1) in 8% of hydrochloric acid; (3): putting the stainless steel material obtained in the step 2) in a heating dehydrator; (4): putting the cleaned stainless steel material into self-control ovenware, and spreading on a mesh belt; (5): gasifying liquid NH3, introducing the gasified liquid NH3 into a decomposing furnace, decomposing through a nickel catalyst, introducing the decomposed NH3 on the stainless steel material processed in the step (4) in an internal tubular type continuous heating furnace after decomposing; and (6) putting the material in a turnover tank after completely cooling. According to the preparation process, the operation is convenient, the cost is relatively low, and the appearance of a stainless steel fastener is not affected under the condition that the hardness requirement is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of alloy treatment, and in particular relates to a preparation process of high-hardness stainless steel. Background technique [0002] In the process of stainless steel processing, there will be structural defects such as non-metallic inclusions, metal inclusions, and chemical composition segregation. According to "Mechanical Properties of Fasteners Stainless Steel Bolts, Screws, and Studs", the highest hardness value is 350-440HV, and vacuum furnaces are generally used in the industry. Production, for some customers of electronic industry appearance parts have special requirements [0003] According to requirements, the overall fasteners are white and bright, and the head needs to be threaded; however, according to the standard hardness value produced by the existing process, the car lines produced by the car repair are blurred, which affects the appearance requirements. [0004] Therefore, it is necessary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/26C23C8/02
CPCC23C8/02C23C8/26
Inventor 蔡俊信
Owner HAMA NAKA MOTOGAWA METAL PROD KUNSHAN
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