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Method for removing titanium based coating film or oxidew of titanium

A technology of titanium oxide and titanium series, applied in the manufacture of tools, etc., can solve problems such as inappropriateness and strong corrosion

Inactive Publication Date: 2004-06-23
NGK INSULATORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Moreover, since the stripping solution mainly composed of hydrogen fluoride is highly corrosive, it is not suitable for stripping the titanium-based film formed on the stainless steel-based base material because it erodes the base material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0030] (embodiment 1-4, comparative example)

[0031] The stainless steel plate was processed into a square plate with a thickness of 30 mm and a length of 220 mm on one side using a grinder.

[0032] In addition, grooves with a width of 0.15 mm and a depth of 3 mm are cut out in a grid pattern with a pitch of 1.1 mm by wire electric discharge machining on one end face of the square plate, and then processed by ECM from the other end face of the square plate. Holes with a diameter of 1mm and a depth of 15mm are machined at the intersection of the seams (skip 1) at a pitch of 1.5mm.

[0033] After the TiCN film was coated by CVD on the mouthpiece (base material) obtained by the above method, the TiCN film and titanium oxide were respectively removed by the methods shown in ①-⑤ without corroding the base material.

[0034] ① Using 12 L of stripping solution (40° C.) containing 3.5 mol / L nitric acid and 5.4 mol / L hydrogen peroxide, 140 g of TiCN film formed on the above-mentione...

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PUM

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Abstract

There are here disclosed a method for removing a titanium-based film from a honeycomb-molding die having on the surface of a base material coated with the titanium-based film, and a method for removing an oxide of titanium from a honeycomb-molding die having the oxide of titanium adhered / deposited on the surface of a base material. In each method, a removing solution comprising a mixture of an acid and hydrogen peroxide is used. According to the methods for removing the titanium-based film and the oxide of titanium, a large amount of the titanium-based film as well as the oxide of titanium adhered / deposited on the base material of a honeycomb-molding die can be removed by use of a small amount of the removing solution without corroding the base material of honeycomb-molding die while re-deposition of dissolved titanium ions on the base material is prevented.

Description

technical field [0001] The present invention relates to a method for removing a titanium-based film and a titanium oxide, and more specifically, to a method for removing a titanium-based film and a titanium oxide from a mouthpiece for honeycomb formation. Background technique [0002] Conventionally, as a mouthpiece for ceramic honeycomb extrusion molding, a mouthpiece for honeycomb molding is known, which has a structure in which groove-like slits are formed on the surface of the unit block and clay introduction holes communicating with the slits are provided on the back surface. [0003] For such honeycomb molding mouthpieces, in order to improve the durability of the mouthpiece while adjusting the slit width of each unit block, for example, the surface of a stainless steel base material is coated with a titanium-based alloy with excellent wear resistance by CVD or PVD. Films (films containing one or more substances selected from TiC, TiN, and TiCN as components) are produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/02C23G1/08
CPCC23G1/081B28B2003/203C23G1/02C23G1/085
Inventor 松本圭司松冈进浅井裕次
Owner NGK INSULATORS LTD
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