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Novel environment-friendly anti-corrosion efficient BSB metal surface treatment method

A metal surface treatment and environmental protection technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of easy deoxidation, easy peeling, trimerization into six-membered ring compound cyanuric acid, etc. , to achieve the effects of good structure of the infiltrated layer, shortened nitriding time, and improved efficiency

Pending Publication Date: 2022-02-25
湖南能岦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a new type of environmental protection, anti-corrosion and high-efficiency BSB metal surface treatment method to solve the problem that the existing metal surface nitriding treatment effect is not good, it is easy to peel, and excessive urea is used as an oxidant, which is easy to deoxidize and trimerize into six in a heating environment. Defects such as metacyclic compounds such as cyanuric acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A novel environment-friendly, anti-corrosion and high-efficiency BSB metal surface treatment method comprises the following steps:

[0023] (1) Pre-treatment of metal parts, specifically as follows: ① Polish, derust, degrease, sandblast and polish the surface of metal parts in sequence; ② Ultrasonic cleaning, water temperature controlled at 60 ° C, cleaning for 5 minutes; ③ Rinse, wash up and down 3 times.

[0024] (2) Put the pretreated metal parts into an aging furnace for preheating, the preheating temperature is controlled at 360° C., and the time is 25 minutes, so that the moisture of the metal parts is fully dried.

[0025] (3) Nitriding salt is added into the nitriding furnace for nitriding salt bath. The temperature of the nitriding salt bath is controlled at 500°C for 23 minutes. Enter oxygen, add potassium oxide again, and the weight ratio of potassium oxide and nitride salt is 1:6, continue the nitride salt bath; Nitride salt comprises urea, sodium carbonate...

Embodiment 2

[0032] A novel environment-friendly, anti-corrosion and high-efficiency BSB metal surface treatment method comprises the following steps:

[0033] (1) Pre-treatment of metal parts, specifically as follows: ① Polish, derust, degrease, sandblast and polish the surface of metal parts in sequence; ② Ultrasonic cleaning, water temperature controlled at 60 ° C, cleaning for 5 minutes; ③ Rinse, wash up and down 3 times.

[0034] (2) Put the pretreated metal parts into an aging furnace for preheating, the preheating temperature is controlled at 370° C., and the time is 28 minutes, so that the moisture of the metal parts is fully dried.

[0035] (3) Nitriding salt is added into the nitriding furnace for nitriding salt bath. The temperature of the nitriding salt bath is controlled at 520°C for 25 minutes. Enter oxygen, add potassium oxide again, and the weight ratio of potassium oxide and nitride salt is 1:6.2, continue nitride salt bath; Nitride salt comprises urea, sodium carbonate a...

Embodiment 3

[0042] A novel environment-friendly, anti-corrosion and high-efficiency BSB metal surface treatment method comprises the following steps:

[0043](1) Pre-treatment of metal parts, specifically as follows: ① Polish, derust, degrease, sandblast and polish the surface of metal parts in sequence; ② Ultrasonic cleaning, water temperature controlled at 60 ° C, cleaning for 5 minutes; ③ Rinse, and repeat the cleaning 3 times on the upper and lower sides.

[0044] (2) Put the pretreated metal parts into an aging furnace for preheating, the preheating temperature is controlled at 360° C., and the time is 25 minutes, so that the moisture of the metal parts is fully dried.

[0045] (3) Nitriding salt is added into the nitriding furnace for nitriding salt bath. The temperature of the nitriding salt bath is controlled at 540°C for 22 minutes. Enter oxygen, add potassium oxide again, and the weight ratio of potassium oxide and nitride salt is 1:6.0, continue nitride salt bath; Nitride salt...

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Abstract

The invention discloses a novel environment-friendly anti-corrosion efficient BSB metal surface treatment method. The method comprises the steps that pretreatment is conducted on a metal part; the metal part is put into an aging furnace to be preheated; nitriding salt is added into the nitriding furnace for nitriding salt bath, when the nitriding salt bath is carried out to half, oxygen is introduced, then potassium oxide is added, and nitriding salt bath continues; the nitriding salt comprises 35 to 40% of urea, 10 to 15% of sodium carbonate and 45 to 50% of potassium carbonate; the metal part is subjected to oxidation salt bath, the temperature of the oxidation salt bath is controlled to range from 360 DEG C to 380 DEG C, and the time ranges from 20 min to 30 min; and post-treatment and sealing treatment are carried out on the metal part. According to the nitriding salt containing the components in percentage, oxygen is introduced and a proper amount of potassium oxide is added in the nitriding salt bath process, so that the proportion of potassium ions to sodium ions is proper, peeling caused by thickening of a black layer due to excessive sodium ions can be prevented, the activity of nitriding salt bath can be guaranteed, and the nitriding efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a novel environment-friendly, anti-corrosion and high-efficiency BSB metal surface treatment method. Background technique [0002] The Chinese invention patent with publication number CN 101144148A discloses a metal surface salt bath nitriding heat treatment method, which is carried out according to the following process flow: (1) clamping: hoisting the metal parts in the material frame; (2) nitriding: placing The metal parts hoisted in the material frame are placed in the nitriding furnace, heated and added with nitride salt for salt bath nitriding, and kept at a temperature of 540-570°C for 30-80 minutes; (3) Cleaning: Nitrogen The metal parts after melting are cleaned, and the water temperature is controlled at 60-80°C. Among them, the nitride salt in the nitriding process includes urea, potassium chloride or barium chloride, sodium carbonate, K 2 S, the comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/58C23C8/02C23C8/80
CPCC23C8/58C23C8/02C23C8/80
Inventor 张文虎李勇张星艳梁纯
Owner 湖南能岦新材料科技有限公司