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Method for improving durability of steel surfaces

A durability and steel technology, applied in metal material coating process, fusion spraying, coating, etc., can solve the problems of large amount of heat, huge heating furnace, unrealistic implementation, etc., achieve fine structure, improve durability, and equipment easy effect

Inactive Publication Date: 2014-09-24
DAI ICHI HIGH FREQUENCY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires a huge heating furnace, and also needs to uniformly heat the interior at a high temperature, so a large amount of heat is required, making it impractical to implement

Method used

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  • Method for improving durability of steel surfaces
  • Method for improving durability of steel surfaces
  • Method for improving durability of steel surfaces

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Embodiment Construction

[0016] Below, refer to Figure 1 to Figure 3 The method of improving the durability of the steel material surface according to the present invention will be described in detail.

[0017] First, in the present embodiment, the steel material to be improved in durability is the steel plate 1 constituting the basic unit of the furnace shell. And the furnace shell is comprised by joining together several steel plates 1, and welding adjacent end parts.

[0018] Specifically, as figure 1 As shown, the steel plate 1 is a plate-pipe composite plate in which pipe portions 11 (pipes) forming cooling channels and plate portions 12 (plates) forming connecting portions are alternately arranged and connected by welding or the like. In addition, the steel plate 1 is used by forming a coating film 2 made of an alloy material on the steel material surface of the steel plate 1 .

[0019] Next, a method of coating the surface of the above-mentioned steel plate 1 with an alloy material, that is...

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Abstract

The purpose of the invention is to realize the improvement of durability of steel materials used in rigorous environment, especially boiler pipes or boiler plates, by a simple method. The method for improving durability of steel surfaces of the invention comprises: thermal spraying of corrosion-resistant self-fluxing alloy powder on a plated film on a steel surface processed by abrasive blasting, and re-fusing processing through high frequency induction heating.

Description

technical field [0001] The present invention relates to a method for improving the corrosion resistance of steel surfaces. It further relates to improving the surface of boiler parts such as tube parts (hereinafter referred to as "boiler tubes") constituting heat transfer tubes in various boilers, or plate-tube composite panels constituting furnace shells with cooling channels (hereinafter referred to as "boiler plates") method of durability. Background technique [0002] Steel is often used in harsh environments. In particular, boiler tubes and boiler plates have been required to have strong corrosion resistance and impact resistance due to an increase in service temperature in recent years, and it has become difficult to use steel materials as they are. Therefore, stainless steel tubes and even titanium tubes have also begun to be used, but due to their high prices, they have not been used on a large scale. [0003] Patent Document 1: JP-A-8-143119 Gazette [0004] Her...

Claims

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Application Information

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IPC IPC(8): C23C4/12C23C4/06C23C24/10
Inventor 铃木贤一
Owner DAI ICHI HIGH FREQUENCY