CN101560618A

CN101560618A - Non-stick pan coating layer and preparation method thereof

Info

Publication number: CN101560618A
Application number: CNA2008100603910A
Authority: CN
Inventors: 鞠汉清; 夏志平
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-18
Filing date: 2008-04-18
Publication date: 2009-10-21

Abstract

The invention provides a non-stick pan coating layer and a preparation method thereof. The coating layer comprises Al-Cu-Fe-Cr-B quasicrystalline alloy which has components as follows by the atomic percentage: 70-90 of Al, 1-15 of Cu, 5-15 of Fe, 5-15 of Cr, and the balance of B and unavoidable impurity. The method comprises the specific steps as follows: (1) smelting alloy materials with a spraying device at a temperature of 900-1100 DEG C to prepare alloy powder; (2) spraying the alloy coating layer on a boiler basal body with a plasma spraying device, with a main gas feed rate of 65 L/min, a secondary gas feed rate of 20-30 L/min, an arc current of 550-590A, an arc voltage of 45-60V, a powder delivering amount of 10-15 g/min, and a coating layer thickness of about 100-200 micro. At a cooking temperature, the invention has the advantages of stable chemical property, large rigidness, lower cost than Teflon or organic silicon, low surface friction coefficient, and the like.

Description

A kind of non-stick pan coating layer and preparation method thereof

Technical field

The present invention relates to cooker, relate in particular to a kind of preparation that does not contain the non-stick pan coating layer of organic coating (as tetrafluoroethylene or organosilicon).

Background technology

People use traditional metal pan (cast iron, stainless steel, aluminium and aluminium alloy) cooking food always for a long time, but the sticking pot of food phenomenon takes place in cooking process often.This has not only destroyed the food profile, and the food of sticking pot takes place by burnt paste the easily, even produces objectionable impurities, influences HUMAN HEALTH.Also increased cooker in addition and scrubbed difficulty, made troubles to culinary art.The mode that existing non-stick pan is dealt with problems is to apply one deck tetrafluoroethylene (Teflon) anti-stick coating at traditional metal pan internal surface, and its principle is to utilize polytetrafluorethylecoatings coatings to have extremely low energy characteristic.

Existing commercially available non-stick pan can satisfy the requirement that the sticking pot of food does not take place in people's cooking process really, but also there are many defectives in it.The intensity that at first is polytetrafluorethylecoatings coatings is relatively poor, comes off easily and damages, and can take place softeningly in the cooking process, can only can not cook harder food with the wood shovel.This non-stick pan also should not be cooked acidic food simultaneously, otherwise can influence the work-ing life of non-stick pan.The use temperature of polytetrafluorethylecoatings coatings generally can not surpass 250 ℃ in addition, and people are difficult to strict control in use, damage because of dry combustion method easily.In use whether exist harm also to have dispute for the polytetrafluorethylecoatings coatings non-stick pan always, constantly cause controversial issue HUMAN HEALTH.

Quasicrystal material is a kind of material with low surface energy characteristic, also has characteristics such as hardness is big, frictional coefficient is low, wear-resistant and corrosion-resistant simultaneously, and this makes quasicrystal material can substitute tetrafluoroethylene to be used to make non-stick pan.Especially Al-Cu-Fe is a quasicrystalline alloy, its surface energy is between stainless steel and tetrafluoroethylene, and is more bigger about 25% than tetrafluoroethylene, add alloying element based on Cr after, corrosion resistance nature further improves, and can be used for substituting tetrafluoroethylene and be used to make non-stick pan.

Summary of the invention

The present invention adopts the Al-Cu-Fe-Cr-B quasicrystalline alloy, substitutes the organic coating (as tetrafluoroethylene or organosilicon) that uses in the existing non-stick pan, thereby improves the above-mentioned defective that present commercially available non-stick pan exists.

The composition of Al-Cu-Fe-Cr-B quasicrystalline alloy of the present invention (atomic percent) is: 70～90%Al, and 1～15%Cu, 5～15%Fe, 5～15%Cr, all the other are B (also can not contain B) and unavoidable impurities.

The present invention adopts the method for low-voltage plasma spraying to prepare Al-Cu-Fe-Cr-B quasicrystalline alloy coating.Its preparation technology is: at first adopt the molten atomizing method to prepare granularity 300～350 purpose powdered alloys, adopt plasma spraying equipment that above-mentioned alloy coat is sprayed on the aluminum alloy pan matrix again.Spray parameters is as follows: the main air stream amount is 65L/min, and inferior airshed is 20～30L/min, and arc current is 550～590A, and arc voltage is 45～60V, and powder sending quantity is 10～15g/min.About aluminum alloy pan substrate preheating to 500 ℃, coat-thickness is controlled at about 100～200 microns during spraying.

Compare with other organic coating non-stick pans, the present invention has the following advantages: (1) quasicrystalline alloy coating chemical property under cooking temp is stable, can not produce objectionable impurities.(2) the quasicrystalline alloy coating hardness is bigger, can avoid shoveling or spoonful damage to the Stickless pan surface coating.(3) price of metal alloy coating is lower than Teflon or organosilicon, and the non-stick pan cost of preparation is lower.(4) the quasi crystal coating skin friction coefficient is low, and mechanical property is owing to organic coating, the long service life of non-stick pan.

Description of drawings

Fig. 1 is the X-ray diffractogram of the quasicrystalline alloy powder that makes in the embodiment of the invention 1.

Embodiment

Concrete steps of the present invention are as follows:

1) uses spraying plant again, under 1050 ℃,, be prepared into alloy powder the alloy raw material fusion.

2) adopt plasma spraying equipment that above-mentioned alloy coat is sprayed on the aluminum alloy pan matrix, the main air stream amount is 65L/min, and inferior airshed is 20～30L/min, and arc current is 550～590A, and arc voltage is 45～60V, and powder sending quantity is 10～15g/min.During spraying about aluminum alloy pan substrate preheating to 500 ℃.

Embodiment 1

With aluminium, iron, copper, chromium and boron according to atomic ratio 71: 9.9: 8.5: 10.5: 0.1 ratio is prepared into alloy powder with spraying plant under 1050 ℃.Adopt plasma spraying equipment that above-mentioned alloy coat is sprayed on the aluminum alloy pan matrix, significant parameter is: the main air stream amount is 65L/min, and inferior airshed is 25L/min, and arc current is 565A, and arc voltage is 49V, and powder sending quantity is 11.5g/min.During spraying about aluminum alloy pan substrate preheating to 500 ℃.Fig. 1 shows the powdered alloy that makes under this ratio crystalline phase that mainly is as the criterion.

Claims

1, a kind of non-stick pan coating layer, it is characterized in that: it includes the Al-Cu-Fe-Cr-B quasicrystalline alloy, the composition of described Al-Cu-Fe-Cr-B quasicrystalline alloy (atomic percent) is: 70～90%Al, 1～15%Cu, 5～15%Fe, 5～15%Cr, all the other are B (also can not contain B) and unavoidable impurities.

2, a kind of preparation method of non-stick pan coating layer according to claim 1 is characterized in that its concrete steps are as follows:

1) adopts spraying plant, under 900 ℃～1100 ℃,, be prepared into alloy powder the alloy raw material fusion;

2) adopt plasma spraying equipment that above-mentioned alloy coat is sprayed on pot matrix, the main air stream amount is 65L/min, and inferior airshed is 20～30L/min, arc current is 550～590A, arc voltage is 45～60V, and powder sending quantity is 10～15g/min, and coat-thickness is controlled at about 100～200 microns.