CN1406665A - Ni-Fe based catalyst alloy without cobalt and manganese and production thereof - Google Patents
Ni-Fe based catalyst alloy without cobalt and manganese and production thereof Download PDFInfo
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- CN1406665A CN1406665A CN 01126079 CN01126079A CN1406665A CN 1406665 A CN1406665 A CN 1406665A CN 01126079 CN01126079 CN 01126079 CN 01126079 A CN01126079 A CN 01126079A CN 1406665 A CN1406665 A CN 1406665A
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Abstract
A Ni-Fe catalyst alloy without Mn and Co in the form of flake or powder for synthesizing high-strength and -quality artificial diamond contains Fe (60-80 wt.%) and Ni+ trace elements (20-40 wt.%). The flaky Ni-Fe catalyst alloy is prepared through proportioning, vacuum smelting, casing, hot forging, hot rolling, argon welding, washing, cold rolling punching and surface treating. The powdered one is prepared through proportioning, vacuum smelting-alloying, spray pulverizing and sieving. Its advantages are low cost, low synthesizing pressure, high output and quality of artificial diamond.
Description
The present invention relates to catalyst alloy and production method thereof that a kind of synthesizing high-strength high quality diamond is used.
Produce diamond catalyst material commonly used and mainly contain Ni-based, iron-based and cobalt base alloy.The cobalt-based catalyst urges fusibleness good, but costs an arm and a leg, domestic seldom use.Required pressure of Ni-based catalyst diamond synthesis and temperature are higher, and output is low slightly, but gained diamond good crystalline, crystals impurity is few, a little less than the magnetic, has high compression strength.And Fe base catalyst is active big, synthetic per unit area yield height, and molten carbon ability is strong, and synthetic parameters is also better.At present, domestic diamond industry generally uses the NiMnCo alloy to produce coarse particles, high-strength artificial diamond.But though make single-crystal diamond about catalyst production ultimate compression strength 15kg with the NiMnCo alloy, synthetic diamond crystalline form is not ideal enough and need to consume precious metal cobalt, production cost height.
Publication number CN1098144A patent of invention has proposed " ferronickel base catalyst alloy ", and its weight composition is that Fe is 15～25%, and Mn is 10～20%, and Cr is 0.5～1.2%, and Ni is a surplus.Though but with this catalyst alloy synthesising coarse particle, high strength gem grade diamond, synthetic diamond color is golden yellow, and crystalline form is complete, and required synthesis pressure is low, and synthetic scope is wide, simple for process, and its raw materials cost and production cost are still higher.Because it is the same with the domestic most of catalyst alloys such as NiMnCo that generally use, need a large amount of price metallic nickels more much higher that use than iron, the content of Ni also will use the high manganese of price comparison to reach more than 10% still up to more than 50% in addition in the component.In addition, operations such as planing surface, annealing, shearing are arranged in the production technique of this invention, both wasted time and energy, influence the crystalline-granular texture and the use properties of catalyst alloy again.
Purpose of the present invention provides a kind of Ni-Fe based catalyst alloy without cobalt and manganese and production method thereof, minimizing is with the nickel amount and improve production technique, further reduce production costs, accomplish, good crystalline dark with its synthetic man-made diamond color, subsurface defect is few, intensity is high, per unit area yield is high, and synthesis pressure is low, synthetic wide ranges, easy to control.
Realize that technical scheme of the present invention is as follows: the weight ratio of alloy component is that Fe is 60～80%, and surplus is Ni and trace element.The sheet production technique is batching → vacuum melting and ingot casting → hot satin → hot rolling → argon arc welding butt joint clot → cleaning → cold rolling → punching press → surface treatment → sorting → packing.The powdery production technique is that batching, vacuum melting alloying, water smoke method or aeroponics dust, sieve, reduce, pack.
Compared with the prior art, the present invention has following characteristics:
1, raw materials cost greatly reduces.
Owing to do not need to use expensive precious metal cobalt and the price manganese more much higher in the raw material than iron, the content of precious metal nickel is by dropping to more than 50% below 40%, therefore raw materials cost has descended manyly, reduces more than 50% than general Ni-Fe base catalyst alloy raw materials cost.
2, cancellation planing surface operation in the sheet production technique has reduced the starting material loss, has improved yield rate, has reduced production cost.
Can dig its surperficial tight zone because ingot casting carries out planing surface, influence the catalyst yield rate.In addition, the broken quarrel under digging reclaims heavy molten meeting increases raw-material consume, so the present invention saves material when improving the catalyst yield rate, reduces production costs.
3, increase the forge hot operation in the sheet production technique, cancellation annealing improves the inner crystalline-granular texture of ingot casting, improves the synthetic scope and the activity of catalyst.
Heat is forged the objective organization of not only improving ingot casting, casting flaws such as that pressing ingot casting Central Plains exists is loose, pore, improve the plasticity of alloy, help following process, the more important thing is and changed its internal organizational structure, make and the enrichment consistent of catalyst surface microstructure orientation, when synthetic, improve the diamond nucleation ability, increase the synthetic scope of catalyst with the diamond nucleation direction of growth.When using this catalyst diamond synthesis, it is low and the synthesis temperature scope is wide to have a synthesis pressure, the per unit area yield height, and advantage such as building-up process is easy to control, synthetic man-made diamond color is good, good crystalline, subsurface defect is few, intensity is high.
4, in the sheet production technique traditional technology cut off that the back monolithic is cold rolling to be changed argon arc welding butt joint back into winding is cold rolling continuously, not only can improve the rate of coming into force, and can guarantee effectively that the thickness of slab of sheet material is within tolerance zone, guarantee catalyst sheet thickness uniformity, it is stable to help in the man-made diamond building-up process holding current.
Introduce production method of the present invention in detail with embodiment below.
Embodiment one sheet production technique
1, batching is 68% by Fe, and surplus is that the prescription of Ni is got raw material ready.
2, vacuum melting and ingot casting drop into vacuum oven with confected materials, close stove evacuation to 10 rapidly
-3Pa send electrofusion, refining, and the time is no more than 60 minutes, with liquation cast cooling, forms ingot casting then.
3, forge hot is heated to ingot casting about 1000 ℃ and is incubated 30 minutes, forges into the forging stock of thickness of slab δ=20 ± 2mm.
4, hot rolling is heated to 950 ± 30 ℃ and be incubated 60 minutes with forging stock, is rolled into the sheet material of thickness of slab δ=3.5 ± 1mm.
5, argon arc welding butt joint clot is wiped out sheet material and is expected end to end, and with the butt joint of argon arc welding welding machine, clot becomes band again.
6, machinery cleans, and carries out machinery with dedicated medium and gets rid of and grind off except that the strip surface oxide compound.
7, cold rolling, the continuous winding of band is cold rolling, reach final dimension ± 0.02mm up to thickness of slab, rolling again.
8, punching and surface treatment strike out the disk of certain specification with band and carry out the processing of surface light decorations with particular manufacturing craft.
9, sorting and packing sub-elect salable product by company standard, and packing is dispatched from the factory.
Embodiment two sheet production technique
This example except that when batching Fe be 65%, surplus is the Ni, all the other are identical with embodiment one.
Embodiment three sheet production technique
This example except that when batching Fe be 80%, surplus is the Ni, all the other are identical with embodiment one.
Embodiment four water smoke method powdery production technique
1, batching is 60% by Fe, and surplus is that the prescription of Ni is got raw material ready.
2, vacuum melting alloying drops into vacuum oven with confected materials, closes stove evacuation to 10 rapidly
-3Pa send electrofusion, refining, and the time is no more than 60 minutes.
3, dust, utilize the water smoke powder-making machine to dust, water smoke pressure 0.4～0.6MPa, dewatered drying.
4, screening with the powder bolting that dehydrates, makes powdery touch coal particle size and meets the product specification requirement.
5, reduction, the powdery alloy that screening is good places special hydrogen reduction furnace, about 900 ℃ of reduction temperatures.
6, packing is packed under vacuum state with polythene film bag.
Embodiment five aeroponics powdery production technique
Remove when adopting aeroponics to dust, all the other are identical with embodiment four.
Claims (3)
1, the Ni-Fe based catalyst alloy without cobalt and manganese used of a kind of synthesizing high-strength high quality diamond, it is characterized in that the weight ratio of alloy component is: Fe is 60～80%, surplus is Ni and trace element.
2, the production method of Ni-Fe based catalyst alloy without cobalt and manganese according to claim 1 is characterized in that the sheet Production Flow Chart is:
A, batching are got raw material ready by the prescription that Fe is 60～80%, surplus is Ni;
B, vacuum melting and ingot casting drop into vacuum oven with confected materials, close stove evacuation to 10 rapidly
-3Pa send electrofusion, refining, and the time does not surpass 60 minutes, with the solution casting cooling, forms ingot casting then;
C, forge hot are heated to ingot casting about 1000 ℃ and are incubated 30 minutes, and satin causes the forging stock of thickness of slab δ=20 ± 2mm;
D, hot rolling are heated to 950 ± 30 ℃ and be incubated 60 minutes with forging stock, are rolled into the sheet material of thickness of slab δ=3.5 ± 1mm;
E, argon arc welding butt joint clot are wiped out sheet material and are expected end to end, and with the butt joint of argon arc welding welding machine, clot becomes band again;
F, machinery clean, and carry out machinery with dedicated medium and get rid of and grind off except that the strip surface oxide compound; Or by pickling removal oxide on surface;
G, cold rolling, the continuous winding of band is cold rolling, reach final dimension ± 0.02mm up to thickness of slab, again rolling;
H, punching and surface treatment strike out the disk of certain specification with band and carry out the processing of surface light decorations with particular manufacturing craft;
I, sorting and packing sub-elect salable product by company standard, and packing is dispatched from the factory.
3, no cobalt according to claim 1 does not have the production method that manganese Ni-Fe base touches the coal alloy, it is characterized in that the powdery Production Flow Chart is that batching, vacuum melting alloying, water smoke method or aeroponics dust, sieve, reduce, pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126079 CN1406665A (en) | 2001-08-20 | 2001-08-20 | Ni-Fe based catalyst alloy without cobalt and manganese and production thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126079 CN1406665A (en) | 2001-08-20 | 2001-08-20 | Ni-Fe based catalyst alloy without cobalt and manganese and production thereof |
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| CN1406665A true CN1406665A (en) | 2003-04-02 |
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| CN 01126079 Pending CN1406665A (en) | 2001-08-20 | 2001-08-20 | Ni-Fe based catalyst alloy without cobalt and manganese and production thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321269A (en) * | 2017-08-08 | 2017-11-07 | 修武县鑫锐超硬材料有限公司 | A kind of preparation method of high grade colorless diamond |
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2001
- 2001-08-20 CN CN 01126079 patent/CN1406665A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321269A (en) * | 2017-08-08 | 2017-11-07 | 修武县鑫锐超硬材料有限公司 | A kind of preparation method of high grade colorless diamond |
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