CN109777981A - A kind of porous half fine and close or complete fine and close nickel metal material and article fabrication methods - Google Patents
A kind of porous half fine and close or complete fine and close nickel metal material and article fabrication methods Download PDFInfo
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- CN109777981A CN109777981A CN201711106314.XA CN201711106314A CN109777981A CN 109777981 A CN109777981 A CN 109777981A CN 201711106314 A CN201711106314 A CN 201711106314A CN 109777981 A CN109777981 A CN 109777981A
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Abstract
The invention discloses a kind of porous half fine and close or complete fine and close nickel metal material and article fabrication methods, are related to powder metallurgy molding technical field of producing.The following processing step of the present invention: S1. ingredient uniformly mixes nickel metal powder with adhesive；The nickel metal powder mixed is filled into the compression moulding carried out under room temperature in the compacting tool set of powder former, obtains the nickel metalwork green compact of specific shape by S2. compression moulding；The nickel metalwork green compact of specific shape are put into progress vacuum-sintering molding in the molybdenum carrier in vacuum sintering furnace by S3. sinter molding, and sintering temperature is 1200 DEG C~1350 DEG C, and sintering time is 2h~4h, obtains high-intensitive nickel metalwork；S4. after sinter molding, nickel metalwork is taken out, nickel metalwork is subjected to lapped face processing.Production technology of the present invention without machining process, it is high in machining efficiency, precision is high, nickel metal material without denaturation, intensity is high, can be directly prepared into porous half fine and close or full dense material and product.
Description
Technical field
The present invention relates to powder metallurgy to be molded technical field of producing, in particular to a kind of porous half fine and close or Quan Zhimi
Nickel metal material and article fabrication methods.
Background technique
In the prior art, to the processing method of nickel metalwork still with punch forming, cut molding, drawing and moulding, milling
It is whittled into based on the traditional processings mode such as type, since the intensity of nickel metalwork is big, density is small, and hardness is big, and fusing point is high, and corrosion resistance is very
By force, therefore, all the time, these processing methods processing nickel metalwork is all relatively difficult, especially the more complicated nickel gold of shape
Category part processing is got up just extremely difficult.But due to metallic nickel refine it is relatively difficult, nickel at high temperature can with oxygen, carbon, nitrogen with
And other many element compounds are formed, therefore, using the nickel gold of the powder metallurgy molding production technology processing of common metal part
It is serious to belong to part material modification, and the nickel metalwork intensity produced is very poor.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of no machining work according to above-mentioned the deficiencies in the prior art
Sequence, it is high in machining efficiency, precision is high, nickel metal material without denaturation, intensity is high, can be directly prepared into porous half fine and close or full dense material
Production technology is molded with the nickel metalwork powder metallurgy of product.
In order to solve the above technical problems, the technical scheme is that a kind of powder metallurgy of nickel metalwork is molded production
Technique comprises the following steps that:
S1. ingredient uniformly mixes nickel metal powder with adhesive；
The nickel metal powder mixed is filled into the compacting tool set of powder former and carries out room temperature by S2. compression moulding
Under compression moulding, obtain the nickel metalwork green compact of specific shape；
S3. sinter molding, by the nickel metalwork green compact of specific shape be put into the molybdenum carrier in vacuum sintering furnace into
Row vacuum-sintering molding, sintering temperature are 1200 DEG C~1350 DEG C, and sintering time is 2h~4h, obtain high-intensitive nickel metal
Part；
S4. after sinter molding, nickel metalwork is taken out, nickel metalwork is subjected to lapped face processing.
Preferably, the powder size of the nickel metal powder is 100~200 mesh, passes through HDH method by sponge nickel
Technique produces.Further, the HDH method technique the following steps are included:
S1. using blocky sponge nickel as raw material, infiltration hydrogen methods is used to prepare hydrogen content as 3.80 ± 0.20wt.%'s
NiH2；
S2. NiH2 is crushed using high-energy ball milling, Ball-milling Time is 20~30 minutes；
S3. supersaturated NaCl aqueous solution is uniformly mixed with NiH2 powder, filters, dries, makes NaCl to the equal of NiH2 powder
Even cladding；
S4. the NaCl NiH2 powder coated is subjected to vacuum high-temperature Dehydroepiandrosterone derivative in a vacuum furnace, obtains NaCl cladding
Dehydrogenation nickel metal powder, desorption temperature range are 580 DEG C~680 DEG C；
S5. dehydrogenation nickel metal powder coat using high-energy ball milling to NaCl carries out ball milling dispersion, Ball-milling Time for 20~
30 minutes；
S6. deionized water elution is carried out to the dehydrogenation nickel metal powder of NaCl cladding, removes NaCl, vacuum drying obtains
Powder size is the nickel metal powder of 100~200 mesh.
The beneficial effects of the present invention are: one, the present invention process nickel metal using the technique of compression moulding and sinter molding
Part, simplify nickel metalwork is made process, has the technical advantage without machining, and precision is high, high production efficiency, also,
In compression moulding step, it can be pressed into nickel metalwork of various shapes, so that the more complicated nickel metalwork of shape adds
Work, which is got up, to be also very easy to；Secondly, powder metallurgy components of the present invention have unique chemical composition and machinery, physical property,
With PM technique, porous, half fine and close or full dense material and product can be directly prepared into；Secondly, the present invention sintering into
In type step, nickel metalwork green compact are put into progress vacuum-sintering molding in the molybdenum carrier in vacuum sintering furnace, in high temperature
Under, nickel metalwork is in stable condition in molybdenum carrier, and the denaturation of nickel metal material will not occur, avoid nickel metalwork and steel, carbon,
The reaction such as the combination reaction of the metals such as nitrogen, oxygen and nonmetallic materials, oxidation reaction；Thirdly, the present invention in sinter molding step,
Sintering temperature is set as to the 70%-80% of nickel melting point metal, i.e., 1200 DEG C~1350 DEG C, is optimal sintering temperature, will burn
The knot time is set as 2h~4h, can reach extraordinary sintering effect, final to obtain high-intensitive nickel metalwork.
Specific embodiment
The working principle of the invention is described in further detail below.
The present invention is a kind of porous half fine and close or complete fine and close nickel metal material and article fabrication methods, including following technique step
It is rapid:
S1. ingredient uniformly mixes nickel metal powder with adhesive；The purity requirement of nickel metal powder 97% or more,
Remaining impurity part is the nickel alloy of the metal materials such as nickel and aluminium, magnesium composition, and adhesive can use conventional metals powder adhesive,
It is no longer described in detail herein；
The nickel metal powder mixed is filled into the compacting tool set of powder former and carries out room temperature by S2. compression moulding
Under compression moulding, obtain the nickel metalwork green compact of specific shape；
S3. sinter molding, by the nickel metalwork green compact of specific shape be put into the molybdenum carrier in vacuum sintering furnace into
Row vacuum-sintering molding, sintering temperature are 1200 DEG C~1350 DEG C, and sintering time is 2h~4h, obtain high-intensitive nickel metal
Part；
S4. after sinter molding, nickel metalwork is taken out, nickel metalwork is subjected to lapped face processing.
The powder size of nickel metal powder is 100~200 mesh, is produced by sponge nickel by HDH method technique
At.100~200 mesh are the best powder sizes of nickel metal powder, i.e., particle diameters are between 75~165 μm, this is always
The nickel metal powder of diameter range, on the one hand, cannot fall into compacting tool set gap, prevent from destroying compacting tool set, on the other hand, tool
Have good mobility, be convenient for compression moulding, in another aspect, can guarantee nickel metalwork reach preferable density (3.5g/cm3 with
On) and intensity.The HDH method technique the following steps are included:
S1. using blocky sponge nickel as raw material, infiltration hydrogen methods is used to prepare hydrogen content as 3.80 ± 0.20wt.%'s
NiH2；
S2. NiH2 is crushed using high-energy ball milling, 20~30min of Ball-milling Time, rotational speed of ball-mill 60-80r/min are
It is good；
S3. supersaturated NaCl aqueous solution is uniformly mixed with NiH2 powder, filters, dries, makes NaCl to the equal of NiH2 powder
Even cladding；
S4. the NaCl NiH2 powder coated is subjected to vacuum high-temperature Dehydroepiandrosterone derivative in a vacuum furnace, obtains NaCl cladding
Dehydrogenation nickel metal powder, desorption temperature range are 580 DEG C~680 DEG C；
S5. dehydrogenation nickel metal powder coat using high-energy ball milling to NaCl carries out ball milling dispersion, Ball-milling Time for 20~
30 minutes；
S6. deionized water elution is carried out to the dehydrogenation nickel metal powder of NaCl cladding, removes NaCl, vacuum drying obtains
Powder size is the nickel metal powder of 100~200 mesh.
Ball milling is simultaneously coated NaCl treated NiH2 powder fine uniform, avoids NiH2 dehydrogenation and customer is allowed to sinter into firmly
Block.
The weight proportion of nickel metal powder and adhesive is 20: 1~28: 1, it is therefore preferable to 24: 1.This weight proportion energy
Guarantee optimal bonding stability, after sinter molding, adhesive volatilization discharge.
In the compression moulding step, the pressure of compression moulding is 3~5Mpa/cm2, the density of the nickel metalwork green compact
For 3.5g/cm3 or more.
The above is only better embodiment of the present invention, and all technical solutions according to the present invention are to above implementation
Any subtle modifications, equivalent variations and modifications, belong in the range of technical solution of the present invention made by mode.
Claims (1)
1. a kind of porous half fine and close or complete fine and close nickel metal material and article fabrication methods, which is characterized in that including following technique
Step: S1. ingredient uniformly mixes nickel metal powder with adhesive；S2. the nickel metal powder mixed is filled in compression moulding
The compression moulding carried out under room temperature is inserted in the compacting tool set of powder former, the nickel metalwork green compact of specific shape are obtained；S3.
Sinter molding, by the nickel metalwork green compact of specific shape be put into the molybdenum carrier in vacuum sintering furnace carry out vacuum-sintering at
Type, sintering temperature are 1200 DEG C~1350 DEG C, and sintering time is 2h~4h, obtain high-intensitive nickel metalwork；S4. sinter molding
Later, nickel metalwork is taken out, nickel metalwork is subjected to lapped face processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711106314.XA CN109777981A (en) | 2017-11-10 | 2017-11-10 | A kind of porous half fine and close or complete fine and close nickel metal material and article fabrication methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711106314.XA CN109777981A (en) | 2017-11-10 | 2017-11-10 | A kind of porous half fine and close or complete fine and close nickel metal material and article fabrication methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109777981A true CN109777981A (en) | 2019-05-21 |
Family
ID=66484510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711106314.XA Pending CN109777981A (en) | 2017-11-10 | 2017-11-10 | A kind of porous half fine and close or complete fine and close nickel metal material and article fabrication methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109777981A (en) |
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2017
- 2017-11-10 CN CN201711106314.XA patent/CN109777981A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190521 |
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| WD01 | Invention patent application deemed withdrawn after publication |