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Chromium-titanium-nitrogen-carbon multicomponent diffusion medium and co-diffusion method thereof

A multi-component co-infiltration, chromium-titanium technology, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of poor high temperature resistance and corrosion resistance of workpieces, and achieve short holding time and good non-stick The effect of viscosity and hardness

Active Publication Date: 2015-11-11
深圳华悦鑫材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the salt bath nitrocarburizing treatment still has the problem of poor high temperature resistance and corrosion resistance of the workpiece.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the percentage of 10-20% sodium carbonate, 1-3% chromium-donating titanium agent, 0.5-1.5% catalyst, 65-80% sodium cyanate, 1-6% sodium hydroxide, and the balance of sodium chloride, the samples are evenly mixed. Obtain chromium-titanium-nitrogen-carbon multi-component co-infiltration agent, sealed and packaged for use, wherein the chromium-titanium agent is in powder state, including chromium-iron alloy and titanium-iron alloy, and the chromium-supply titanium agent also includes chromium powder, Cr 2 o 3 , at least one of chromate and chromite powder, and the chromium-donating titanium agent also includes at least one of sponge titanium, titanium powder, titanium chloride, titanium oxide, titanium hydride, and ilmenite powder. The catalyst is NH 4 A mixture of Cl and NaF. The mass ratio of iron, chromium and titanium contained in the chromium-donating titanium agent is Fe:Cr:Ti=1:2-5:1-3. Take the above-mentioned chromium-titanium-nitrogen-carbon multi...

Embodiment 2

[0025] Same as Example 1, except that the mass percentage of the chromium-donating titanium agent is 1%, and the mass percentage of the sodium chloride is 12%. After surface treatment by the above method, the thickness of the workpiece surface penetration layer is measured to be 100 μm, and the surface hardness Hv 1.0 =550.

Embodiment 3

[0027] Same as Example 1, except that the mass percentage of the chromium-donating titanium agent is 0.1%, and the mass percentage of the sodium chloride is 12.9%. After surface treatment by the above method, the thickness of the workpiece surface penetration layer is measured to be 100 μm, and the surface hardness Hv 1.0 =450.

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Abstract

The invention discloses a chromium-titanium-nitrogen-carbon multicomponent diffusion medium which is composed of sodium carbonate, a chromium-titanium supply agent, a catalyst, sodium chloride, sodium hydroxide and sodium cyanate. On the basis of an improved nitrocarburizing salt bath diffusion medium, metal elements of chromium and titanium are creatively added, and through chromium-titanium-sulfur-nitrogen-carbon multicomponent medium-temperature salt bath co-diffusion, a workpiece can have the better high-temperature resistance, fatigue resistance and corrosion resistance and higher hardness. Compared with the conventional thermal treatment technology, medium-temperature salt bath co-diffusion is adopted in the medium, the treatment temperature is low, temperature keeping time is short, and energy can be saved to a great extent; and compared with carburizing and quenching, energy can be saved by more than 50%. The diffusion medium and a co-diffusion method are wide in application range and suitable for surface treatment of carbon structural steel, die steel and stainless steel.

Description

technical field [0001] The invention relates to the surface treatment technology of metal materials, in particular to a chromium-titanium-nitrogen-carbon multiple co-infiltration agent and a co-infiltration method thereof. Background technique [0002] The surface and near-surface area of ​​the material control many mechanical and chemical properties of the solid, such as friction, wear, corrosion and fracture, etc. Therefore, the use of various surface treatment technologies to modify the performance of the material surface is an important link to ensure the quality and service life of the mold . At present, there are many kinds of mold surface treatment technologies, commonly used are carburizing, nitriding, carbonitriding, sulfur nitrogen carbonitriding, boronizing, vanadiumizing, TD coating, physical vapor deposition and so on. Among them, carbonitriding is the most widely used. Nitrocarburizing is a chemical heat treatment process in which nitrogen and carbon are infi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C12/02
Inventor 刘永春
Owner 深圳华悦鑫材科技有限公司
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