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Zinc-aluminium embedding co-penetrating method for iron and steel products and its penetrant

A product and iron and steel technology, which is applied in the field of zinc-aluminum inclusion co-infiltration method and infiltration agent for iron and steel products, can solve problems affecting the installation and use of equipment or parts, deformation of steel products, etc., and achieve production cost reduction, energy consumption reduction, The effect of excellent corrosion resistance and abrasion resistance

Inactive Publication Date: 2003-07-09
中国石油乌鲁木齐石油化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The process temperature of aluminizing or filtering rare earth co-infiltration is as high as 900 ° C, which is easy to cause serious deformation of steel products (because the annealing temperature of general steel such as 20# steel is about 700 ° C), thus affecting the installation and use of equipment or parts, Therefore, at present, in terms of surface treatment of equipment, aluminized steel is only used on small parts under special process conditions.

Method used

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  • Zinc-aluminium embedding co-penetrating method for iron and steel products and its penetrant
  • Zinc-aluminium embedding co-penetrating method for iron and steel products and its penetrant
  • Zinc-aluminium embedding co-penetrating method for iron and steel products and its penetrant

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Embodiment

[0021] Example: Embed the iron and steel products in the infiltrating agent, at 400°C or 500°C or 600°C, after heat preservation treatment for 3 hours, 5 hours or 10 hours, an outer layer rich in aluminum and an inner layer are formed on the surface of the steel product. Zinc-aluminum co-dripping layer with zinc-rich double-layer structure.

[0022] After the zinc-aluminum coating is completed, the temperature is lowered to room temperature, the iron and steel product is taken out from the infiltration agent, and the residue on the surface is removed to obtain the steel product with the zinc-aluminum coating.

[0023] Before embedding steel products in penetrating agent, it is better to carry out surface degreasing or / and derusting or / and sandblasting of steel products; According to the condition, choose any one or any two or more treatment methods among oil removal, rust removal and sandblasting treatment.

[0024] In the above-mentioned embodiment, one of the penetrating ag...

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Abstract

The present invention relates to a zinc-aluminium embedding copenetrating method of iron and steel products and its penetrant. Its method includes the following steps: embedding iron or steel product in the penetrant, heat-insulating treatment for 3-10 hr at 400 to 600 deg.C, then a zinc-aluminium copenetrated layer with double-layer structure whose external layer is enriched with aluminium and internal layer is enriched with zinc is formed on the surface of iron or steel product, so that the iron or steel product can have more excellence anticorrosion property and resistance to abrasion.

Description

1. Technical field: [0001] The invention relates to chemical heat treatment of metals, and relates to a zinc-aluminum cladding co-infiltration method and an infiltration agent for iron and steel products. 2. Background technology: [0002] Chemical heat treatment of metals has developed a large number of process technologies, such as carburizing, nitriding, boronizing, siliconizing, aluminizing, zincizing, chromizing, etc. , Titanium-aluminum co-infiltration, etc. But there has never been a report of zinc-aluminum embedded co-infiltration. [0003] Reports on hot-dip galvanized aluminum alloy coatings show that zinc-aluminum alloy coatings have better corrosion resistance and oxidation resistance than hot-dip galvanized coatings, and have both good properties of galvanized coatings and aluminum coatings. The energy consumption of zinc-aluminum alloy coating is relatively high. [0004] Aluminized steel has excellent resistance to corrosion in high-temperature environments...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/52
Inventor 何业东王德仁王延锁杨延平秦学功李德志
Owner 中国石油乌鲁木齐石油化工有限公司
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