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Surface treatment process for forming alloy by carrying out titanium-coating and titanizing on metal surface

A metal surface and surface treatment technology, which is applied to the surface treatment process of titanium infiltration to form an alloy, and in the field of titanium plating on the metal surface, can solve problems such as poor effect, consumption of titanium powder, failure of titanium infiltration treatment, etc., to achieve the purpose of the method Novelty, superior effect, and good promotion and application value

Inactive Publication Date: 2013-04-24
四川恒为制钛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The old method is not only ineffective, but also consumes a lot of expensive titanium powder
At the same time, due to inadvertent air intake during operation, etc., it is also very easy to cause failure of titanium infiltration treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Applying the process of the invention to carry out titanium infiltration treatment on the inner wall of a new reactor used for producing sponge titanium.

[0042] 1 After passing the inspection, soak the new reactor in dilute hydrochloric acid for 5 days, then clean it with water, and dry it with compressed air.

[0043] 2 Place a small amount of solid magnesium and a small amount of small particle sponge titanium (3-5mm) in the reactor.

[0044] 3 Put the assembled reactor into the electric heating furnace, and install the feeding tube.

[0045] 4 The reactor is degassed at low temperature. Start the vacuum pump to evacuate to -0.085MPa, send power to raise the temperature, keep the temperature at 150°C for 1 hour, and keep the temperature at 300°C for 2 hours.

[0046] 5 Slowly add an appropriate amount of titanium tetrachloride during the subsequent temperature rise. During the feeding process, attention should be paid to maintaining the pressure in the reactor at...

Embodiment 2

[0052] On the basis of Example 1 (that is, the container described in this example is selected as the reactor used to produce sponge titanium), metal devices that need to be treated with titanium plating and titanium infiltration on the surface are suspended on the brackets placed in the reactor. By operating according to the first step of the embodiment, the operations of titanium plating and titanium infiltration can be completed on the surface of the device to be treated. For example, in the production of sponge titanium, a new steel sieve plate must be put into the reactor first. Because the sieve plate is also in direct contact with the product sponge titanium, it also needs to be treated with titanium infiltration on the surface. The surface of the sieve plate is pickled, derusted and dried, then placed in the reactor, and then operated according to the first step of the embodiment, the surface of the built-in sieve plate can obtain the same excellent titanium infiltrati...

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Abstract

The invention discloses a surface treatment process for forming alloy by carrying out titanium-coating and titanizing to a metal surface. The surface treatment process comprises the following steps: a, adding metal magnesium, granular titanium sponges and metal devices needing surface treatment into a container, and sealing the container; b, heating up the container, and carrying out degassing treatment in the container at the temperature of 140-310 DEG C; c, continuously heating up the container, and ventilating titanium tetrachloride to the container during a heat-up process, and maintaining the pressure in the container at 0.02-0.04 MPa; and keeping the temperature constant for 9-11 hours when the temperature is raised to 990-1010 DEG C; and d, taking out and cooling the metal devices from the container. The surface treatment process disclosed by the invention is simple, scientific and reasonable; the effect for forming the alloy by titanium-coating and titanizing is excellent; and the surface treatment process has a good popularization and application value.

Description

technical field [0001] The invention relates to a surface treatment process, in particular to a surface treatment process which can improve the effect of titanium infiltration by plating titanium on the metal surface and infiltrating titanium to form an alloy. Background technique [0002] Protective treatment of metal surfaces as required is widely used in many fields. One of the main applications of the invention is in the treatment of the interior surfaces of new reactors for the production of titanium sponge. Because the magnesium reduction vacuum distillation method is used to produce sponge titanium, the molten metal magnesium and liquid titanium tetrachloride undergo a reduction reaction in the reactor to generate sponge-like metal titanium. The reactor is usually made of boiler steel plate (20g) or stainless steel (1Cr18Ni9Ti). Under high temperature conditions, the iron in the inner wall of the reactor and other steel components that are in direct contact with raw ...

Claims

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Application Information

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IPC IPC(8): C23C10/08C23C16/14
Inventor 董震宇魏钰朱广路
Owner 四川恒为制钛科技有限公司
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