A viscose short fiber cutting knife manufactured by powder metallurgy method of mixing pure powder

A viscose staple fiber, powder metallurgy technology, applied in other manufacturing equipment/tools, mechanical equipment, turbines, etc., can solve the problems of coarse grains of the casting structure, jumping edge, unsatisfactory service life, etc., to improve corrosion resistance. , the structure of small grains, the effect of improving the service life

CN107287472BActive Publication Date: 2019-01-22沈阳拓普新材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-01-22

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Abstract

The invention relates to manufacture of a viscose staple fiber chemical fiber cutter. The manufacture comprises the following steps that at least nine kinds of pure powder such as Co, Cr, Cr3C2, W, WC, Ni, Mo, Cu and NbC is mixed, then the powder mixture is pressed into a knife-shaped pressed blank, sintering is conducted in a vacuumfurnace in 1200-1300 DEG C, and sintered blank is machined to the size required by a drawing. The chemical fiber cutter has the advantages that the chemicalfiber cutter produced by using a powder metallurgical method is more uniform in texture, texture defects of a casting part does not exist, new components such as columbiumcarbide and copper are added in a traditional formula, the service life is longer, and by adjusting the carbide content, the cutter hardness being needed by users can be manufactured.
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Description

technical field

[0001] The invention belongs to the technical field of manufacturing non-ferrous metal alloys, especially the manufacturing of cobalt-based powder metallurgy chemical fiber cutting knives, and particularly relates to manufacturing by powder metallurgy, which has the characteristics of uniform structure and no defects, and the addition of niobium carbide to its traditional components increases the composition. The wear resistance of the knife, adding copper to increase the corrosion resistance of the material, so that it has a longer service life is a viscose staple fiber cutting knife made by powder metallurgy mixed with pure powder. Background technique

[0002] The chemical fiber cutting knife is a key part of chemical fiber production, and it is also a wearing part used in large quantities in the chemical fiber industry. In the prior art, there are two production methods of viscose staple fiber chemical fiber cutting knives: one is the cobalt-based chemica...

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Embodiment Construction

[0016] The invention is a viscose staple fiber cutting knife manufactured by powder metallurgy method of mixing pure powder, the components of the viscose staple fiber cutting knife are composed of Co, Cr, Cr 3 C 2 , W, WC, Ni, Mo, Cu, NbC 9 kinds of pure powder are mixed, the mixed powder is pressurized and pressed in a mold of the required shape; the molded body is sintered in a vacuum furnace at 1200 ℃ ~ 1300 ℃, and its hardness is HRC35 ~ Continuously adjustable within 55°;

[0017] Components Co, Cr, Cr of the viscose staple fiber cutting knife 3 C 2 , W, WC, Ni, Mo, Cu, NbC 9 kinds of pure powder content (weight %): Co: 40 ~ 60%; Cr: 20 ~ 30%; Cr 3 C 2 : 5~15%;W:3~9%; WC: 0~5%; Ni:3~9%; Mo:0~5%; Cu:0~5%; NbC: 3~7%; The addition of Cu and Cu is the main feature of the components of the present invention;

[0018] A specific embodiment is: with 11kgCr powder, 4.1kg Cr 3 C 2 powder, 2.65kgNbC powder, 1.45kgWC powder, 1.5kgW powder, 3kgNi powder, 0.6kgCu powder, 0.75...