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A kind of preparation method of vn19 vanadium nitrogen alloy and a kind of sagger device

A technology of vanadium-nitrogen alloy and VN19, which is applied in metal material coating technology, solid-state diffusion coating, coating, etc., can solve the problems of complex operation and high cost, achieve good nitriding effect, reduce preparation cost, and reduce carbonization temperature Effect

Active Publication Date: 2022-05-27
承德锦科科技股份有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is costly and complicated

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  • A kind of preparation method of vn19 vanadium nitrogen alloy and a kind of sagger device

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preparation example Construction

[0026] The invention provides a preparation method of VN19 vanadium-nitrogen alloy, comprising the following steps:

[0027] After mixing powdery vanadium oxide, silicon dioxide powder, carbonaceous reducing agent, iron powder and binder, press ball, dry, vacuum carbonization reduction and nitridation in sequence to obtain VN19 vanadium nitrogen alloy; the vacuum carbonization reduction The temperature is less than or equal to 1450°C, and the time is less than or equal to 2.5h; the nitriding is carried out under nitrogen conditions, the nitrogen pressure of the nitriding is more than or equal to 0.3MPa, and the time is less than or equal to 3h.

[0028] In the present invention, the VN19 vanadium-nitrogen alloy is specifically the VN19 brand vanadium-nitrogen alloy in GB / T20567-2020, and the specific composition index is shown in Table 1:

[0029] Table 1 Chemical composition of VN19 vanadium-nitrogen alloy

[0030]

[0031] In the present invention, powdery vanadium oxide...

Embodiment 1

[0055] The vanadium pentoxide powder, 98% quartz powder, graphite powder and iron powder are mixed according to the mass ratio of 100:3:29:0.4, and after mixing, they are pressed into balls and dried. The dry balls are placed in a graphite saggar, and a number of through holes are arranged at the bottom of the graphite saggar; the graphite bottom plate is placed in a vacuum furnace, the surface of the graphite bottom plate is provided with a strip groove, and the bottom of the groove is provided with a nitrogen inlet hole, and nitrogen gas is introduced The hole is connected to the nitrogen inlet of the vacuum furnace; the graphite saggar is placed in the vacuum furnace, placed on the surface of the graphite bottom plate, and the bottom of the graphite sagger covers the groove on the surface of the graphite bottom plate.

[0056] Close the door of the vacuum furnace, turn on the vacuum pump, pump the vacuum in the furnace to 95Pa, start to send electricity for rapid heating, 2....

Embodiment 2

[0058] The vanadium trioxide powder, 98% quartz powder, graphite powder and starch are mixed according to the mass ratio of 100:3:26.5:3, and the mixture is pressed and dried. The dry balls are placed in a graphite saggar, and a number of through holes are arranged at the bottom of the graphite saggar; the graphite bottom plate is placed in a vacuum furnace, the surface of the graphite bottom plate is provided with a strip groove, and the bottom of the groove is provided with a nitrogen inlet hole, and nitrogen gas is introduced The hole is connected to the nitrogen inlet of the vacuum furnace; the graphite saggar is placed in the vacuum furnace, placed on the surface of the graphite bottom plate, and the bottom of the graphite sagger covers the groove on the surface of the graphite bottom plate.

[0059] Close the door of the vacuum furnace, turn on the vacuum pump, pump the vacuum in the furnace to 88Pa, start to send electricity for rapid heating, the furnace temperature ris...

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Abstract

The invention relates to the technical field of metallurgy and provides a preparation method of a VN19 vanadium nitrogen alloy. The invention mixes powdery vanadium oxide, silicon dioxide powder, carbonaceous reducing agent, iron powder and binder, and then carries out ball pressing, drying, vacuum carbonization reduction and nitriding in sequence to obtain VN19 vanadium nitrogen alloy. In the present invention, silicon dioxide powder is added to the raw material, and the silicon dioxide powder is reduced to form silicon nitride during the nitriding process, which is beneficial to increase the nitrogen content of the product. The present invention carries out carbonization reduction under vacuum conditions, and carries out nitriding under high nitrogen pressure, and can realize energy-saving, high-efficiency and fast preparation of VN19 vanadium-nitrogen alloy. Furthermore, the present invention optimizes the direction of the nitrogen gas flow during the nitriding process, and adopts weak cooling and strong cooling in the cooling process in sections to increase the nitrogen content of the product, make full use of heat energy, and reduce the production cost.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a preparation method of a VN19 vanadium-nitrogen alloy and a saggar device. Background technique [0002] Nitrogen is a very effective and cheap alloying element in vanadium-containing microalloyed steels. For vanadium, nitrogen has a stronger affinity than carbon, increasing the content of nitrogen in vanadium-nitrogen alloys, and the precipitation strengthening and precipitation of vanadium in steel. The crystal strengthening effect is more obvious. Under the same strength, adding high nitrogen vanadium nitrogen alloy can save the amount of vanadium added, thereby reducing the cost. Therefore, it is very important to increase the nitrogen content in vanadium-nitrogen alloys. [0003] At present, the mainstream process for the production of vanadium-nitrogen alloys is the push-plate kiln method. The push-plate kiln method produces vanadium-nitrogen alloys. During the product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C27/02C23C8/24
CPCC22C1/058C22C27/025C23C8/24
Inventor 刘克忠贾怡晗王清晨刘健王朝晖曹长山刘亚亮王彬彬索小琛池浩巍李阳翁玉娟岳庆丰
Owner 承德锦科科技股份有限公司
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