CN1147561A - Smelting process of high-speed tool steel - Google Patents
Smelting process of high-speed tool steel Download PDFInfo
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- CN1147561A CN1147561A CN 95116783 CN95116783A CN1147561A CN 1147561 A CN1147561 A CN 1147561A CN 95116783 CN95116783 CN 95116783 CN 95116783 A CN95116783 A CN 95116783A CN 1147561 A CN1147561 A CN 1147561A
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- tool steel
- speed tool
- weight
- steel
- tungsten
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Abstract
The present invention discloses direct tungsten and molybdenum concentrate reducing process for smelting high-speed tool steel. It features that scheelite and molybdenum concentrate rather than tungsten and ferro-molybdenum are used as material and ferro-silicon powder as reductant is added during smelting. The present invention can lower the prodn cost in smelting high-speed tool steel greatly.
Description
The invention belongs to and adopt direct-reduction process to smelt the technical field of liquid steel, particularly relate to a kind of in medium-frequency induction furnace the direct method of reduction sheelite, concentrated molybdenum ore smelting high-speed tool steel.
As everyone knows, rapid tool steel contains W, M usually
o, Cr, V alloy element, utilize these alloying elements in steel, to form tough and tensile special phase, to satisfy the service requirements of rapid tool steel.
In the prior art of smelting high-speed tool steel, no matter be to adopt which kind of melting unit, all be form adding W, M with master alloy
o, Cr, V alloy element, such as ferro-tungsten, ferro-molybdenum, ferrochrome and ferro-vanadium,, have following significant disadvantages and deficiency although can more accurately control the composition in the steel and shorten the heat:
1, contains W, M
o, master alloys such as Cr, V melting, consume big energy, and have loss, cause the smoke contamination physical environment simultaneously.
2, contain W, M
o, iron alloys such as Cr, V price climb to a higher point day by day, cost that make to produce rapid tool steel raises, and influences the economic benefit of manufacturer.
The objective of the invention is to change traditional method, and directly reduce tungsten, concentrated molybdenum ore at the medium-frequency induction furnace smelting high-speed tool steel with master alloy smelting high-speed tool steels such as ferrotungsten, molybdenum-irons.
According to purpose of the present invention, following technical solution is proposed:
A kind of method of smelting high-speed tool steel adds in the general smelting equipment raw material through fusing, slagging-off, deoxidation, sampling analysis, composition adjustment and tapping processing step;
Except that ordinary scrap steel, also adding contains W 〉=50% (weight), granularity is the tungsten concentrate of 1～5mm, contains M in the raw material
o〉=40% (weight), granularity are the concentrated molybdenum ore of 1～5mm, contain Si 70～75% (weight), granularity is the ferrosilicon powder of 1～10mm;
Described proportion of raw materials be (weight, %): ordinary scrap steel: tungsten concentrate: concentrated molybdenum ore: ferrosilicon powder=75～77: 12～14: 5～7: 4～6.
The processing step of smelting high-speed tool steel is, at furnace bottom pack into tungsten, concentrated molybdenum ore, ferrosilicon powder adds ordinary scrap steel again, fusing then, in melting process, ferrosilicon powder is a reductive agent, and tungsten, concentrated molybdenum ore have obtained reduction, slagging-off, deoxidation then, resampling is analyzed tungsten, molybdenum composition in the molten steel, adds Cr, V alloy adjustment composition, tapping.
Advantage of the present invention is to use no or little to contain W, M
oAlloy, and directly adopt tungsten, concentrated molybdenum ore, do not influence the tap to tap time and the quality of rapid tool steel, and greatly reduce the cost of smelting high-speed tool steel, for manufacturer has brought remarkable economic efficiency.
Embodiment
Climb steel steel city main office of enterprise and smelt materials processing factory and utilize method smelting high-speed tool steel of the present invention, in the 500kg medium-frequency induction furnace directly reduction contain W 〉=50% (weight), granularity be 1～5mm tungsten concentrate for and contain M
o〉=40% (weight), granularity are that (trade mark is W9M for the concentrated molybdenum ore smelting high-speed tool steel of 1～5mm
oCr4V), it is that the ferrosilicon powder of 1～10mm is as reductive agent that employing contains Si 70～75% (weight), granularity, replace the original traditional method that adds tungsten, ferro-molybdenum smelting high-speed tool steel of utilizing, ordinary scrap steel: tungsten concentrate: concentrated molybdenum ore: the proportioning (weight of ferrosilicon powder, be 75～77 %): 12～14: 5～7: 4～6, after raw material is fused into molten steel, slagging-off, carry out deoxidation with Al then, carry out W, M in the sampling analysis steel
oComposition adds V, Cr iron alloy adjustment composition, is 1580 ℃ of tappings at molten steel temperature, and tap to tap time and quality and traditional method are suitable.
This factory implements technical solutions according to the invention, has obtained remarkable economic efficiency, replaces the cost of tungsten, ferro-molybdenum smelting high-speed tool steel to reduce at least more than 3000 yuan/ton with tungsten, concentrated molybdenum ore, makes product have the prosperous and powerful vitality and the market competitiveness.
Claims (1)
1, a kind of method of smelting high-speed tool steel adds in the general smelting equipment raw material through fusing, slagging-off, deoxidation, sampling analysis, composition adjustment and tapping processing step, it is characterized in that:
(1) in the raw material except that ordinary scrap steel, also allocate into contain W 〉=50% (weight), granularity is the tungsten concentrate of 1～5mm, contains M
o〉=40% (weight), granularity are the concentrated molybdenum ore of 1～5mm, contain Si 70～75% (weight), granularity is the ferrosilicon powder of 1～10mm;
(2) proportioning raw materials be (weight, %): ordinary scrap steel: tungsten concentrate: concentrated molybdenum ore: ferrosilicon powder=75～77: 12～14: 5～7: 4～6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95116783 CN1147561A (en) | 1995-10-10 | 1995-10-10 | Smelting process of high-speed tool steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95116783 CN1147561A (en) | 1995-10-10 | 1995-10-10 | Smelting process of high-speed tool steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1147561A true CN1147561A (en) | 1997-04-16 |
Family
ID=5081036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95116783 Pending CN1147561A (en) | 1995-10-10 | 1995-10-10 | Smelting process of high-speed tool steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1147561A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100500908C (en) * | 2007-05-17 | 2009-06-17 | 钢铁研究总院 | Technique for alloying steel making directly from tungsten ore |
| CN106591566A (en) * | 2016-12-12 | 2017-04-26 | 嵩县开拓者钼业有限公司 | Method for smelting tungsten-molybdenum-iron alloy from tungsten-molybdenum associated mineral |
| CN109762958A (en) * | 2019-03-28 | 2019-05-17 | 丹阳市曙光特钢有限公司 | A kind of technique of the smelting containing tungsten highspeed steel |
-
1995
- 1995-10-10 CN CN 95116783 patent/CN1147561A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100500908C (en) * | 2007-05-17 | 2009-06-17 | 钢铁研究总院 | Technique for alloying steel making directly from tungsten ore |
| CN106591566A (en) * | 2016-12-12 | 2017-04-26 | 嵩县开拓者钼业有限公司 | Method for smelting tungsten-molybdenum-iron alloy from tungsten-molybdenum associated mineral |
| CN109762958A (en) * | 2019-03-28 | 2019-05-17 | 丹阳市曙光特钢有限公司 | A kind of technique of the smelting containing tungsten highspeed steel |
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| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |