CN101775531B - Nickel-molybdenum-copper alloy and preparation method thereof - Google Patents
Nickel-molybdenum-copper alloy and preparation method thereof Download PDFInfo
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- CN101775531B CN101775531B CN2010101401792A CN201010140179A CN101775531B CN 101775531 B CN101775531 B CN 101775531B CN 2010101401792 A CN2010101401792 A CN 2010101401792A CN 201010140179 A CN201010140179 A CN 201010140179A CN 101775531 B CN101775531 B CN 101775531B
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Abstract
The invention discloses a nickel-molybdenum-copper alloy, which is an alloying agent used for smelting pipe line steel, stainless steel and special steel. The alloy comprises: 20 to 45 percent of nickel, 1 to 8 percent of molybdenum, 18 to 50 percent of copper, less than 0.5 percent of carbon, less than 0.05 percent of sulfur, less than 0.05 percent of phosphorus, less than 2.0 percent of silicon and the balance of ferrum. The alloy can be put at one time during the smelting of the pipe line steel and the like and reduce the labor intensity of smelters.
Description
Technical field
The present invention relates to a kind of alloy, be specifically related to a kind of nickel-molybdenum-copper alloy, is the alloying agents that is used to smelt pipe line steel, stainless steel, special steel.
Background technology
The smelting of special steel such as pipe line steel, stainless steel mainly is to use metallic nickel and molybdenum-iron as alloying agents, adopts pure nickel as alloy addition, and production cost is higher.Also have and adopt nickel ores as raw material, because the nickeliferous grade of nickel ores is not high, complicated component, the association gangue is many, and the production technique of therefore extracting nickel is very complicated, and production cost is also very high.
The CN1540021A patent of invention discloses a kind of nickel-molybdenum alloy, and its main component is: by weight percentage, nickel 9-50%, molybdenum 9-40%, surplus is Fe and impurity.It has solved the problem of the repeatedly interpolation difference alloying that adopts metallic nickel, molybdenum-iron, and has avoided adopting electrolytic nickel as the too high problem of the cost of alloying agents.Yet the composition of this alloy design is unreasonable, and about 1576 degrees centigrade of the fusing points of this nickel-molybdenum alloy approach 1620 degrees centigrade molten steel temperature, thereby exists in the steel solution time long and be not easy to dissolve fully.And the density of this alloy is bigger, is difficult to fusing in molten steel, and therefore, the recovery rate of alloying element is lower.Simultaneously, the preparation method of this nickel-molybdenum alloy adopts nickel molybdenum sulphide symbiotic ore through abrasive dust, roasting, and pressure ball, the reduction melting, enrichment is smelted fine setting and is waited 7-8 operation just can finish, its complex process long flow path, investment is big, and production efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of novel alloy, the nickel-molybdenum alloy fusing point that is used for special steels smeltings such as existing pipe line steel, stainless steel with solution is too high, is difficult to dissolving, the problem that its alloying element recovery rate is low.
For achieving the above object, the invention provides a kind of nickel-molybdenum-copper alloy,, contain nickel 20-45% according to weight percent meter, molybdenum 1-8%, copper 18-50%, surplus is an iron and must evitable impurity.
Described nickel-molybdenum-copper alloy, preferred version be, according to weight percent meter, contains nickel 25-35%, molybdenum 4-7%, and copper 25-40%, surplus is an iron and must evitable impurity.
Described nickel-molybdenum-copper alloy, further preferred version is, according to weight percent meter, contains nickel 30-35%, molybdenum 4-7%, copper 30-40%, surplus is an iron and must evitable impurity.
Described nickel-molybdenum-copper alloy, more preferably scheme is,, according to weight percent meter, contain nickel 32-35%, molybdenum 4-7%, copper 35-40%, surplus is an iron and must evitable impurity.
Described nickel-molybdenum-copper alloy, its foreign matter content is: carbon is less than 0.5, sulphur is less than 0.05, phosphorus less than 0.05. silicon less than 2.0.
The fusing point of described nickel-molybdenum-copper alloy is 1360-1450 ℃, and density is 8.4-9.0g/m
3
The present invention also provides the preparation method of described nickel-molybdenum-copper alloy, and it comprises following steps: adopt useless nickel, copper scrap, useless corronel to make nickel source and Tong Yuan, it is characterized in that, adopt ripe molybdenum ore to smelt as the molybdenum source:
1) above-mentioned useless nickel, copper scrap, useless corronel, useless nickel-molybdenum alloy raw material are melted through electric arc furnace earlier, controlled temperature is more than 1500 ℃, and the slag making of adding slag former;
2) ripe molybdenum ore and slag former, reductive agent mixture are added in the stove melt, the control furnace temperature is more than 1650 ℃, and it is melted fully and reacts by stirring, and the reductive agent of described ripe molybdenum ore is coke and aluminium, and consumption accounts for 22% of ripe molybdenum ore total amount;
3) controlled temperature is come out of the stove then and is carried out ingot casting or granulation at 1550-1630 ℃.
As preferred version, the method for the invention is further comprising the steps of before coming out of the stove: adopt oxygen blowing method to carry out impurity such as decarburization, desulfurization, dephosphorization; Adding lime, fluorite slag former again adjusts basicity and is: 0.7-1.2, discharge liquid slag.
As preferred version, further comprising the steps of before coming out of the stove: as alloy liquid to be moved to intermediate frequency furnace carry out trimming, select metallic nickel, metallic copper and molybdenum-iron as adjusting the composition raw material.
Nickel-molybdenum-copper alloy of the present invention is compared with the disclosed nickel-molybdenum alloy of CN1540021A, because the molybdenum content of alloy of the present invention is low, has added low-melting copper (1083 ℃) simultaneously the product fusing point is declined to a great extent about 130 ℃.Therefore, nickel-molybdenum-copper alloy composition proportion of the present invention is reasonable, and its fusing point is low, make it can dissolve fast in molten steel, and diffusion profile is even, the recovery rate height.Alloying constituent of the present invention is even simultaneously, the intensity height, and foreign matter content is low, and particularly sulphur and phosphorus content are low, therefore can guarantee the Control of Impurities requirement of steel fully.
The preparation method of nickel-molybdenum-copper alloy of the present invention mainly selects for use ripe molybdenum ore former as molybdenum, adopt carbon and aluminium as reductive agent, its molybdenum element is smelted acquisition with ripe molybdenum ore synchronously at electric arc furnace, thereby has both reduced production cost, make refuse obtain utilizing again, saved a large amount of limited resources.Its nickel and copper are mainly derived from the useless pure nickel of industry, useless fine copper and the symbiotic compo pipe of useless ambrose alloy molybdenum, component of machine etc., have reduced production cost.
The present invention further adopts oxygen blast to remove the method for impurity, and the carbon in the alloy is controlled at below 0.5%, and sulphur is controlled at below 0.05%, and phosphorus is controlled at below 0.05%, and silicon is controlled at below 2.0%.Because carbon content is low, makes alloy be difficult for becoming fragile, avoided because of its broken loss that causes; The content of phosphorus reduces can improve the alloy pulverization phase.And phosphorus, sulphur is harmful element in the steel, reduces the refining load that impurity helps reducing steel.
In the method for the present invention, if the composition miss the mark value of smelting in electric arc furnace goes to alloy liquid and carries out trimming in the intermediate frequency furnace, its production efficiency height, energy consumption is low, and production process waste gas waste sludge discharge is few.
Nickel-molybdenum-copper alloy of the present invention can satisfy steel alloyings such as smelting pipe line steel, stainless steel, special steel, the nickel, molybdenum and the copper that cost an arm and a leg with scarcity of resources have been substituted, make original alloying process by adding electrolytic nickel respectively, electrolytic copper, 3 kinds of metals of molybdenum-iron become disposable this product of adding, thereby have simplified the steelmaking alloy processing step, have improved productivity, save the cost of alloying agents, alleviated the steel-making operation labor intensity.
Embodiment
Describe the present invention in detail below in conjunction with specific embodiment.
Embodiment one, is example to produce 1 ton of nickel-molybdenum-copper alloy of the present invention, and this alloying constituent is: by weight percentage, and nickel 30%, molybdenum 6%, copper 45%, carbon 0.4%, sulphur 0.04%, phosphorus 0.03%, silicon 1.5%; Balance iron.
Batching: adopt ripe molybdenum ore 115kg, wherein contain molybdenum 48-50%, sulphur≤0.065%, phosphorus≤0.025%, silicon-dioxide 8-12%; An amount of useless nickel, copper scrap and useless corronel are raw material, and alloy per ton is determined the consumption of useless nickel, copper scrap and useless ambrose alloy coexisting material according to nickel and copper target value; Surplus is a steel scrap.
By the ton raw material, need to add slag former calcium oxide 47kg and Calcium Fluoride (Fluorspan) 9kg; Reductive agent: coke 26kg and aluminium powder 3kg; Take off assorted agent: oxygen 35kg.
Smelting technology:
1, will give up nickel and copper scrap raw material earlier through the electric arc furnace fusing, temperature remains on more than 1500 ℃, and add the small part slag former: 10kg calcium oxide and 2-2.5kg Calcium Fluoride (Fluorspan) carry out slag making, deslagging then.
2, with ripe molybdenum ore of 115kg and residue slag former: 37kg calcium oxide, 6kg Calcium Fluoride (Fluorspan); Reductive agent: 26kg coke, 3kg al powder mixt add in the stove and melt, and the control furnace temperature is more than 1650 ℃, it is melted fully and react by stirring.Carbon, aluminium is as reductive agent, reduces Mo in the ripe molybdenum ore
2O
3The interior alloying constituent (by weight percentage) of stove this moment is about; Nickel 31%, molybdenum 5.7% bronze medal 47%, carbon 1.6%, sulphur 0.05%, phosphorus 0.1%, silicon 2.3%.
3, sampling chemical examination is carried out decarburization, dephosphorization, desiliconization processing by its actual constituent.Take oxygen blowing method to remove impurity, oxygen flow per minute 3-3.5kg, and rock the oxygen pipe and blow each position, molten bath to guarantee the comprehensive of reaction.
4, after oxygen blast is finished, look the working of a furnace and add slag formers such as lime, fluorite again, adjustment basicity is: 1.0, liquid slag to be discharged, and the liquation composition behind the impurity is removed in sampling analysis.As the qualified ingot casting of promptly coming out of the stove; As defective, alloy liquid hot charging transferred to intermediate frequency furnace carry out trimming and additional.Add steel scrap when principal element is higher and adjust, add useless pure nickel, useless fine copper when on the low side, contain the molybdenum-iron of molybdenum more than 60% and adjust.
The alloying constituent that makes through check is: nickel 30%, molybdenum 6%, copper 45%, carbon 0.4%, sulphur 0.04%, phosphorus 0.03%, silicon 1.5%, balance iron.
Embodiment two, make nickel-molybdenum-copper alloy through aforesaid method of the present invention, according to weight percent meter, contain nickel 25%, molybdenum 5%, and copper 50%, carbon 0.44%, sulphur 0.045%, phosphorus 0.04%, silicon 1.0%, surplus is an iron.
Embodiment three, make nickel-molybdenum-copper alloy through aforesaid method of the present invention, according to weight percent meter, contain nickel 35%, molybdenum 7%, and copper 40%, carbon 0.3%, sulphur 0.035%, phosphorus 0.04%, silicon are in 1.8%, and surplus is an iron.
Embodiment four, make nickel-molybdenum-copper alloy through aforesaid method of the present invention, according to weight percent meter, contain nickel 32%, molybdenum 4%, and copper 30%, carbon 0.42%, sulphur 0.041%, phosphorus 0.039%, silicon 1.6%, surplus is an iron.
Embodiment five, make nickel-molybdenum-copper alloy through aforesaid method of the present invention, according to weight percent meter, contain nickel 22%, molybdenum 6%, and copper 40%, carbon 0.4%, sulphur 0.048%, phosphorus 0.046%, silicon 1.9%, surplus is an iron.
Embodiment six, make nickel-molybdenum-copper alloy through aforesaid method of the present invention, according to weight percent meter, contain 38%, molybdenum 5%, and copper 28%, carbon 0.4%, sulphur 0.038%, phosphorus 0.043%, silicon 1.3%, surplus is an iron.
Claims (9)
1. a nickel-molybdenum-copper alloy is characterized in that, according to weight percent meter, contains nickel 20-45%, molybdenum 1-8%, and copper 18-50%, surplus is iron and unavoidable impurities.
2. nickel-molybdenum-copper alloy according to claim 1 is characterized in that, according to weight percent meter, contains nickel 25-35%, molybdenum 4-7%, and copper 25-40%, surplus is iron and unavoidable impurities.
3. nickel-molybdenum-copper alloy according to claim 1 is characterized in that, according to weight percent meter, contains nickel 30-35%, molybdenum 5-7%, and copper 30-40%, surplus is iron and unavoidable impurities.
4. nickel-molybdenum-copper alloy according to claim 1 is characterized in that, according to weight percent meter, contains nickel 32-35%, molybdenum 5-7%, and copper 35-40%, surplus is iron and unavoidable impurities.
5. according to each described nickel-molybdenum-copper alloy among the claim 1-4, it is characterized in that according to weight percent meter, in the impurity of described alloy: carbon is less than 0.5, and sulphur is less than 0.05, and phosphorus is less than 0.05, and silicon is less than 2.0.
6. according to the preparation method of each described nickel-molybdenum-copper alloy among the claim 1-4, it comprises following steps: according to target value selects useless nickel, copper scrap, useless corronel to make nickel source and Tong Yuan, it is characterized in that, adopts ripe molybdenum ore to smelt as the molybdenum source:
1) will give up nickel, copper scrap, useless corronel raw material earlier through the electric arc furnace fusing, controlled temperature is more than 1500 ℃, and adding slag former slag making and deslagging;
2) ripe molybdenum ore and slag former, reductive agent mixture are added in the stove melt, the control furnace temperature is more than 1650 ℃, and stirs and it is melted fully and react, and the reductive agent of ripe molybdenum ore of being used to reduce is coke and aluminium, accounts for ripe molybdenum ore total amount 22%;
3) when temperature during, come out of the stove and carry out ingot casting or granulation at 1550-1630 ℃.
7. the preparation method of nickel-molybdenum-copper alloy according to claim 6 is characterized in that: further comprising the steps of before coming out of the stove: adopt oxygen blowing method to remove carbon, sulphur, phosphorus impurities; Adding lime, fluorite slag former again adjusts basicity and is: 0.7-1.2, discharge liquid slag at last.
8. the preparation method of nickel-molybdenum-copper alloy according to claim 6, it is characterized in that: come out of the stove carry out ingot casting or granulate before further comprising the steps of: gained alloy liquid is moved to intermediate frequency furnace carries out trimming, select metallic nickel, metallic copper and molybdenum-iron as adjustment composition raw material.
9. the preparation method of nickel-molybdenum-copper alloy according to claim 7, it is characterized in that: come out of the stove carry out ingot casting or granulate before further comprising the steps of: gained alloy liquid is moved to intermediate frequency furnace carries out trimming, select metallic nickel, metallic copper and molybdenum-iron as adjustment composition raw material.
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| CN2010101401792A CN101775531B (en) | 2010-04-07 | 2010-04-07 | Nickel-molybdenum-copper alloy and preparation method thereof |
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| CN101775531B true CN101775531B (en) | 2011-06-22 |
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| CN105401084A (en) * | 2015-12-19 | 2016-03-16 | 丹阳市宸兴环保设备有限公司 | Copper-nickel alloy steel |
| CN107130127A (en) * | 2016-02-29 | 2017-09-05 | 金华市程凯合金材料有限公司 | A kind of formula for the slag former smelted for leaded copper alloy |
| CN107245575B (en) * | 2017-06-30 | 2018-12-14 | 马鞍山华盛冶金科技发展有限公司 | It is a kind of for smelting the complex reducing agent and its smelting process of low-grade tungsten mine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310454A (en) * | 2000-01-27 | 2001-08-29 | 日矿金属株式会社 | Copper alloy for electronic material |
| CN1396289A (en) * | 2002-08-19 | 2003-02-12 | 盛国大 | Fragile NiCuSi alloy |
| CN1540021A (en) * | 2003-10-31 | 2004-10-27 | 江苏江南铁合金有限公司 | Nickel molybdenum alloy and preparation method |
| CN1806059A (en) * | 2004-03-15 | 2006-07-19 | 丰田自动车株式会社 | Build-up wear-resistant copper alloy and valve seat |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310454A (en) * | 2000-01-27 | 2001-08-29 | 日矿金属株式会社 | Copper alloy for electronic material |
| CN1396289A (en) * | 2002-08-19 | 2003-02-12 | 盛国大 | Fragile NiCuSi alloy |
| CN1540021A (en) * | 2003-10-31 | 2004-10-27 | 江苏江南铁合金有限公司 | Nickel molybdenum alloy and preparation method |
| CN1806059A (en) * | 2004-03-15 | 2006-07-19 | 丰田自动车株式会社 | Build-up wear-resistant copper alloy and valve seat |
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