CN1109577C - Iron-base alloy catalyst and its preparing method - Google Patents
Iron-base alloy catalyst and its preparing method Download PDFInfo
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- CN1109577C CN1109577C CN00110864A CN00110864A CN1109577C CN 1109577 C CN1109577 C CN 1109577C CN 00110864 A CN00110864 A CN 00110864A CN 00110864 A CN00110864 A CN 00110864A CN 1109577 C CN1109577 C CN 1109577C
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- iron
- powder
- base alloy
- alloy catalyst
- nickel
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Abstract
The present invention relates to an iron-base alloy catalyst (used for synthesizing high-grade diamond single crystals) and a preparation thereof. The iron-base alloy catalyst comprises iron, nickel, manganese, cobalt, copper and graphite, wherein the iron content is between 50 and 76%. The preparation method of the iron-base alloy catalyst has the steps that first, various ingredients are manufactured into powder which are uniformly and proportionally mixed; then, the mixture carries out cold-press forming, and carries out low temperature sintering in a sintering furnace; finally, shaping and surface cleaning are carried out. The iron-base alloy catalyst produced by the method of the present invention has high finished product rate. Diamonds synthesized by the iron-base alloy catalyst has high grade, high intensity, large granularity and low cost.
Description
Technical field
The invention belongs to metal material field, especially for iron-base alloy catalyst that synthesizes the high-grade diamond single crystal and preparation method thereof.
Background technology
Adamantine artificial synthesizing mainly is to utilize graphite and the physical reactions of catalyst under high-temperature and high-pressure conditions, impels the SP of carbon atom in the graphite
2Hybrid state is to the SP of diamond lattic structure
3Hybrid state transforms.The extensive use nickel-base alloy is made synthetic adamantine catalyst both at home and abroad, and this manufacture craft mainly due to catalyst plate adopts following technology path usually: vacuum melting-casting-hot rolling cogging-warm-rolling-vacuum annealing-pickling-cold rolling-finish rolling-punching-product inspection.Therefore, require catalyst material to have good ductility, nickel-base alloy can satisfy above-mentioned technological requirement substantially.For example: " artificially synthesizing diamond " the 76th page of disclosed nickel-manganese-cobalt ternary-alloy catalyst that publishing house of Jilin University published in 1996, adopt above-mentioned process exactly.But the nickel-base alloy catalyst plate yield rate less than 30% of utilizing this process to produce.Because the cost of raw material and production technology cost are very high, so the fetch long price of nickel-base alloy catalyst plate is difficult to reduce.In addition, Ni very easily enters diamond lattice in the artificially synthesizing diamond process, exists as impurity, causes diamond at the grinding adstante febre, because of the coefficient of expansion ambassador diamond generation micro-crack of Ni.So, make catalyst with nickel-base alloy, synthetic diamond grade is low, and compression strength is low, and granularity is less than normal.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, iron-base alloy catalyst that a kind of cost is low, production process is simple, yield rate is high and preparation method thereof is provided.
The present invention realizes in the following manner:
Iron-base alloy catalyst is made up of iron, nickel, manganese, cobalt, copper, graphite, it is characterized in that adopting following method preparation:
(1) iron powder, nickel powder, cobalt powder, manganese powder, copper powder, graphite powder, the ratio of iron 50～76%, nickel 14～40%, cobalt 0.2～2%, manganese 3～8%, copper 0.5～3%, graphite 0.5～1.5% mixes by weight percentage, and about ball milling to 200 order, moisture is removed in oven dry;
(2) be sheet with mixed powder cold-press moulding under 500～600Mpa pressure;
(3) the sheet blank is fed the protective atmosphere heating in sintering furnace, carry out low-temperature sintering under 700 ℃～1050 ℃ temperature, temperature retention time is no less than 4 hours;
(4) carry out behind the sintering finishing shape, removing surface, remove depollute, spot and oxide-film.
Because the Fe in the ferrous alloy is difficult for entering diamond lattice, thus of high grade with the synthetic diamond of iron-base alloy catalyst, granularity big (more than the diameter 0.5mm), and production cost is low.Utilize this method to produce iron-base alloy catalyst, yield rate can reach more than 95%, and can eliminate common process and cause defectives such as the work hardening of catalyst plate and the pollution of the acid surfaces degree of depth.
The specific embodiment provides a most preferred embodiment of the present invention below the specific embodiment:
Adopt following formulated iron-base alloy catalyst:
Iron powder: 76% (w.t.)
Nickel powder: 18% (w.t.)
Cobalt powder: 1% (w.t.)
Manganese powder: 4% (w.t.)
Copper powder: 0.5% (w.t.)
Graphite powder: 0.5% (w.t.)
With above-mentioned powder weighing proportioning, mix the back with four post hydro-forming machines, under 570MPa pressure, be shaped, make φ 23mm, thickness is the disk of 0.4mm, is heated to 870 ℃ then in sintering furnace, feeds hydrogen shield, is incubated 4 hours.Finishing then, the cleaning surface.
On cubic hinge press, the technological specification of diamond synthesis monocrystalline operation routinely.Obtain diamond particle size 〉=0.5mm, compression strength meets SMD in 27～34kgf scope
25The standard-required of level quality product.
Claims (1)
1. iron-base alloy catalyst is made up of iron, nickel, manganese, cobalt, copper, graphite, it is characterized in that adopting following method preparation:
(1) iron powder, nickel powder, cobalt powder, manganese powder, copper powder, graphite powder, the ratio of iron 50～76%, nickel 14～40%, cobalt 0.2～2%, manganese 3～8%, copper 0.5～3%, graphite 0.5～1.5% mixes by weight percentage, and ball milling to 200 order, moisture is removed in oven dry;
(2) be sheet with mixed powder cold-press moulding under 500～600Mpa pressure;
(3) the sheet blank is fed the protective atmosphere heating in sintering furnace, carry out low-temperature sintering under 700 ℃～1050 ℃ temperature, temperature retention time is no less than 4 hours;
(4) carry out behind the sintering finishing shape, removing surface, remove depollute, spot and oxide-film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110864A CN1109577C (en) | 2000-01-31 | 2000-01-31 | Iron-base alloy catalyst and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110864A CN1109577C (en) | 2000-01-31 | 2000-01-31 | Iron-base alloy catalyst and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1261553A CN1261553A (en) | 2000-08-02 |
| CN1109577C true CN1109577C (en) | 2003-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00110864A Expired - Fee Related CN1109577C (en) | 2000-01-31 | 2000-01-31 | Iron-base alloy catalyst and its preparing method |
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| CN (1) | CN1109577C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396371C (en) * | 2007-01-16 | 2008-06-25 | 山东大学 | Carbonizing-body diamond catalyst and preparing method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314488C (en) * | 2005-03-21 | 2007-05-09 | 山东大学 | Catalyst contg. Fe-Ni-B-C used for synthesizing single-crystal of boron-contained diamond and its prepn. method |
| CN100425333C (en) * | 2007-01-22 | 2008-10-15 | 山东大学 | Method for preparing cementite |
| CN103418311B (en) * | 2012-05-21 | 2017-06-20 | 长春师范大学 | A kind of Novel catalyst for diamond synthesizing |
| CN108043408B (en) * | 2017-10-31 | 2020-08-11 | 江苏西玉钻石科技有限公司 | Preparation method of catalyst for gem-grade artificial diamond monocrystal and catalyst |
| CN108746611A (en) * | 2018-06-14 | 2018-11-06 | 余姚市菲特塑料有限公司 | A kind of low-temperature sintering method of high-performance Fe-based powder metallurgy parts |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098144A (en) * | 1993-07-29 | 1995-02-01 | 冶金工业部长沙矿冶研究院 | Nickel-iron base catalyst alloy and its making method |
| CN1116144A (en) * | 1995-04-20 | 1996-02-07 | 朱贵增 | Catalytic alloy powder and producing method |
-
2000
- 2000-01-31 CN CN00110864A patent/CN1109577C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098144A (en) * | 1993-07-29 | 1995-02-01 | 冶金工业部长沙矿冶研究院 | Nickel-iron base catalyst alloy and its making method |
| CN1116144A (en) * | 1995-04-20 | 1996-02-07 | 朱贵增 | Catalytic alloy powder and producing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396371C (en) * | 2007-01-16 | 2008-06-25 | 山东大学 | Carbonizing-body diamond catalyst and preparing method |
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| Publication number | Publication date |
|---|---|
| CN1261553A (en) | 2000-08-02 |
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Granted publication date: 20030528 Termination date: 20110131 |