Purpose of the development: A new approach to engineered surface which comprises forming a structural phase-regulated state, and carbonitride karbooksidnyh surface layers by thermal diffusion in the saturation temperature falls below the polymorphic transformation efficiently in comparison with other methods of diffusion saturation increase wear and corrosion resistance of titanium alloys.

Recommended application field: Titanium and its alloys due to low specific strength, corrosion inertness and high biocompatibility is widely used in aerospace, automotive, chemical industry and medicine.

Advantages over analogues: Diffusion methods have advantages in technology and are environmentally friendly. An important advantage of the method of diffusion saturation is possible to provide high adhesion of the coating to the matrix via the formation of transient diffusion layer.

The development stage readiness: Ready for application

Description of the development:
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Modern trends in surface engineering thermodiffusive saturation associated with the formation of coatings based on ternary compounds (carbo- nitrides , carbo oxides and oxynitrides ) . This is due to the fact that the ternary compound which combines the basic structure and properties of binary compounds and compositions in equiatomic substantially exceed blocked. Carbo nitriding . In order to bring the nitriding diffusion carbo industrial conditions were determined intervals process parameters (temperature, duration of the saturation partial pressure of gas components ( oxygen and nitrogen ) within which at temperatures below the formation of the polymorphic transformation carbo nitride compound. Specifically , the nitrogen pressure should vary between 1-10 [5] Pa , and the pressure of oxygen - 10 [-3] to 10 [2] Pa . under such conditions, the formation of a ternary compound occurs at temperatures of 800-850 * C. The study on the influence of saturation showed growth of content comprising carbon carbonitride with time. Using oxygen saturation temperature at carbo nitriding hardening provides greater surface depth is greater modified layer ( coating and the gas-saturated zone). Carbo oxidation . Changing the temperature and duration of oxidation carbo provided to maintain a constant oxygen partial pressure in the dynamic environment provides an opportunity to influence the carbon content of the components in the composition carbooxide , as well as the dimensions constituting the modified layer . Studied that the corrosion rate of samples with and carbonitride coatings karbooksidnym compared to samples with single coatings on two orders of magnitude lower .

Information about newness of the development:

ноу-хау--
1 шт.

corresponds technical description
Ready for implementation

Possibility of transfer abroad:
Licence's sale
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Country Ukraine

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E-mail: gal@uintei.kiev.ua