Sintering technique of powder metallurgy product nickel-containing raw material
A powder metallurgy and raw material technology, applied in the field of sintering process of powder metallurgy products containing nickel element raw materials, can solve the problems of high cost, poor toughness, and it is difficult for products to achieve uniform surface hardness, so as to reduce the quenching process and save high costs. Effect
Inactive Publication Date: 2015-03-04
TAICANG JINLIDE POWDER METALLURGY
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Problems solved by technology
After quenching, it is difficult to achieve consistent surface hardness and poor toughness, and the cost of special raw materials and imported sintering furnaces is too high
Method used
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[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0023] The sintering process of the powder metallurgy product containing nickel element raw material of the present embodiment, its used sintering furnace, such as figure 1 As shown, it includes the conveying mesh belt 1 arranged in the furnace body of the sintering furnace, and along the conveying direction of the conveying mesh belt 1 (the conveying direction is as figure 1 The direction indicated by the arrow in ) is provided with a pre-cooling zone 4, a high-temperature sintering zone 3 and a cooling zone 4, wherein the end of the cooling zone 4 close to the high-temperature sintering zone 3 is connected with a nitrogen pipe 5, through which the nitrogen pipe 5 can enter Nitrogen is blown to the raw material in the cooling zone 4, specifically, nitrogen gas of 5 to 10 atmospheres (such as 6 atmospheres, 7 atmospheres, and 8 atmospheres) is...
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The invention discloses a sintering technique of a powder metallurgy product nickel-containing raw material. A sintering furnace used by the sintering technique comprises a high-temperature sintering region and a cooling region; the sintering furnace is provided with a nitrogen pipe which is communicated with the cavity of the cooling region; and the nitrogen pipe is arranged at the end of the cooling region adjacent to the high-temperature sintering region, and is used for blowing nitrogen to the raw material of the cooling region. In order to obtain the same surface hardness as after quenching treatment, the sintering technique does not need to purchase or use any special raw material, and only needs to add the nickel element into the common iron mesh copper carbon raw material and combine the installation of the nitrogen pipe at the cooling region. Although the quenching process is reduced, the sintered part still has certain toughness, thereby saving the high cost for the raw material and imported sintering furnace.
Description
technical field [0001] The invention relates to a sintering process, in particular to a sintering process of a raw material containing nickel element of a powder metallurgy product. Background technique [0002] At present, the method for powder products to increase product hardness is to increase the surface hardness of parts through quenching after sintering, or to purchase special raw materials and sinter in imported sintering furnaces to achieve surface hardness and certain toughness. After quenching, it is difficult to achieve consistent surface hardness and poor toughness, and the cost of special raw materials and imported sintering furnaces is too high. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a low-cost sintering process for powder metallurgy products containing nickel element raw materials according to the current technical situation. [0004] The technical solution adopted by the present inventi...
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Inventor 杨立冬徐道金
Owner TAICANG JINLIDE POWDER METALLURGY