Preparation method for 304 austenite stainless steel rotary blades of juicer

A technology of austenitic stainless steel and fruit juice machine, which is applied in the field of ion nitrogen carburizing process to change the performance of stainless steel, and can solve the problems of easy falling off and polluting the surface layer

Active Publication Date: 2017-05-31
QINGDAO AGRI UNIV
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Problems solved by technology

At present, high-end fruit juice machines at home and abroad are manufactured with different surface hardening methods, such

Method used

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  • Preparation method for 304 austenite stainless steel rotary blades of juicer
  • Preparation method for 304 austenite stainless steel rotary blades of juicer
  • Preparation method for 304 austenite stainless steel rotary blades of juicer

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Embodiment Construction

[0021] In the ion nitriding equipment (manufactured by Qingdao Fengdong Heat Treatment Co., Ltd., model: FD-WR120 / 150-150), the 304 austenitic stainless steel rotary blade of the fruit juice machine is subjected to plasma nitrocarburizing treatment.

[0022] The first step: Put the 304 austenitic stainless steel rotary blade of the fruit juice machine into the plasma equipment, and evacuate to a vacuum of 5 Pa;

[0023] Step 2: Nitrogen-filled external heating, fill the nitrogen to an atmospheric pressure, turn on the external heating, and the external heating temperature is 350°C;

[0024] Step 3: After the temperature of the blade reaches 300°C and is soaked, vacuumize to the ultimate vacuum;

[0025] Step 4: Plasma nitriding treatment, continuously inject hydrogen gas at 300ml / min and nitrogen gas at 900ml / min into the equipment, maintain the pressure in the furnace at 150Pa, and turn on the high-frequency power supply;

[0026] Step 5: Plasma nitrocarburizing treatment, k...

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Abstract

The invention relates to a plasma nitrocarburizing technique for 304 austenite stainless steel rotary blades of a juicer. After the 304 austenite stainless steel rotary blades are subjected to plasma nitrocarburizing treatment, and hardened layers with the thicknesses being more than 15 [mu]m are generated on the surfaces of the stainless steel rotary blades and oversaturation solid solutions (S phases) of nitrogen and carbon in austenite. The 304 austenite stainless steel rotary blades have high hardness and corrosion resistance, and various technical indices all exceed food mechanical standard requests.

Description

technical field [0001] The invention is a heat treatment process, specifically, a plasma nitrocarburizing process in chemical heat treatment to change the properties of stainless steel. Background technique [0002] In food processing, 304 austenitic stainless steel is widely used due to its excellent corrosion resistance and machinability, but its hardness is low (200-250HV) and poor wear resistance. Food made of 304 austenitic stainless steel Mechanical parts, especially in acidic environments and wear-resistant occasions, are difficult to meet the use requirements, which affects the service life of these parts. [0003] The rotary vane blade is an important part in the fruit juice machine, it is made of 2mm thick 304 austenitic stainless steel. During the juicing process of the fruit juice machine, the fruit is crushed and juiced by the high-speed rotating rotary blade. High-speed rotation causes the blades of the rotary blades to wear out, and the weak acidity of some ...

Claims

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Application Information

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IPC IPC(8): C23C8/34C23C8/38
CPCC23C8/34C23C8/38
Inventor 于春娣唐娟
Owner QINGDAO AGRI UNIV
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