CN1219602A - Ni-V-Ti alloyed pig iron for casting and its manufacturing method and usage - Google Patents
Ni-V-Ti alloyed pig iron for casting and its manufacturing method and usage Download PDFInfo
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- CN1219602A CN1219602A CN 96117746 CN96117746A CN1219602A CN 1219602 A CN1219602 A CN 1219602A CN 96117746 CN96117746 CN 96117746 CN 96117746 A CN96117746 A CN 96117746A CN 1219602 A CN1219602 A CN 1219602A
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Abstract
A Ni-V-Ti alloy pig iron contains such components as C (3.3-4.2%), Si (0.2-3.6%), Mn (0.3-1.0%), P (less than 0.1%), S (less than 0.05%), Ni (0.2-3.0%), V (0.2-1.5%), Ti (0.04-0.6), Fe (rest) and Cr, Co and Cu (less than 0.3%), and is made up through mixing Ni-containing sulfate slag ore concentrate with V-Ti magnetite ore concentrate to obtain self-smelting mixed sinter ore, and smelting in blast furnace. Its advantages are easily available raw materials, low consumption of energy and low cost. The crackshaft made of high-Ni, High-V, low-Ti rare-earth alloy nodular cast iron for IC engine, the brake (clutch) part made of low-Ni, low-V, low-Ti rare-earth alloy semi-nodular semi-vermicular cast iron for vehicle and the cylinder made of middle-Ni, middle-V, middle-Ti rare-earth alloy vermicular cast iron for IC engine are disclosed.
Description
The present invention relates to a kind of metallurgic product: Ni-V-Ti alloyed pig iron for casting and manufacture method thereof.Also relate to the three kinds of purposes inventions such as cast iron car brakeing (clutch) element, middle nickel vanadium titanium rare earth alloy vermicular cast iron internal combustion engine cylinders of partly wriggling of the low titanium rare earth alloy spheroidal graphite cast iron I. C. engine crankshaft of its nickelic high vanadium, low Ni alum Ti rare earth alloy hemisphere simultaneously.
At present in the machinery manufacturing industry, mostly adopt the Ni-Cr-Mo cast alloy iron to make various complex structures, wall thickness thin or wall is very inhomogeneous, strength and stiffness require very high, wear resistance, resistance to fatigue, thermotolerance, thermal fatigue resistance, solidity to corrosion, the senior foundry goods of exigent this class, as various large-scale high-precision bed pieces, internal combustion engine cylinders and cylinder cap, steam turbine body, huge injection moulding machine oil cylinder or the like.But because the manufacture method of Ni-Cr-Mo cast alloy iron all is to add expensive pure metal and alloy such as electrolytic nickel, molybdenum-iron, ferrochrome in the reflow process of common high duty pig iron, thereby make the cost and price costliness of these parts, be difficult to accept.Simultaneously, aspects such as the wear resistance of Ni-Cr-Mo alloy iron casting, heat resistance, solidity to corrosion are also not as good as the V-Ti alloy iron casting.
Purpose of the present invention, be exactly to provide a kind of cheaply, be suitable for industrial greatly, can fully utilize Mineral resources, more save the energy, be mainly used in and improve partly the wriggle prescription and the manufacture method thereof of Ni-V-Ti alloyed pig iron for casting of ironcasting pieces of vermicular cast iron sectional sensitivity and use properties of nodular iron casting hemisphere, and use this pig iron and produce the senior alloy iron casting of various Ni-V-Ti, replace Ni-Cr-Mo alloy high-test cast iron spare.
Ni-V-Ti alloyed pig iron for casting of the present invention contains following composition (weight percent): C 3.3-4.2%, Si 0.2-3.6%, Mn0.3-1.0%, P＜0.1%, S＜0.05% Ni 0.2-3.0%, V 0.2-1.5%, Ti 0.04-0.6%, surplus is Fe and total amount less than trace elements such as 0.3% Cr, Cu, Co.
The processing method of making Ni-V-Ti alloyed pig iron for casting of the present invention is: adopt nickeliferous sulfate slag to do raw material, through fine grinding, roasting, ore-dressing technique is handled, obtain sulphur content and be lower than 0.3%, iron-holder is higher than 50%, nickel content is higher than 0.2% nickeliferous sulfate slag concentrate, press Ni-V-Ti alloyed pig iron composition proportion requirement again, this nickeliferous sulfate slag concentrate and v-ti magnetite concentrate mix sintering (roasting) are become self-fluxing nature mixed sintering (roasting pelletizing) ore deposit, again the blast-furnace smelting of smelting pig iron containing vanadium is dropped in this self-fluxing nature mixed sintering (roasting pelletizing) ore deposit and promptly get product.
Described nickeliferous, sulfate slag concentrate can be with rough basic carbonate nickel powder [3Ni (OH)
22NiCO
3] replace, its add-on is pressed the component proportions of Ni-V-Ti alloyed pig iron for casting and is determined then according to the actual nickel content of this rough basic carbonate nickel powder.
Described self-fluxing nature mixed sintering (roasting pelletizing) ore deposit, the mechanical mixture that also can adopt self-fluxing nature v-ti magnetite concentrate sintering (roasting pelletizing) ore deposit to add rough ferronickel replaces; Can also be replaced by the mechanical mixture that self-fluxing nature common iron ore concentrate sintered (roasting pelletizing) ore deposit adds rough ferronickel and vanadium slag.For the small furnace of smelting the conventional cast pig iron, allow to add Wingdale and replace above-mentioned self-fluxing nature common iron ore concentrate sintered (roasting pelletizing) ore deposit with common rich iron ore.
Cast iron is one of industrial most widely used metallic substance, but that common grey iron exists intensity is low, the problem of poor impact toughness.Improve cast iron intensity and toughness for these years and just become the top priority of cast iron alloyization, the Ni-Cr-Mo cast alloy iron is exactly its best achievement, but the cost height.After spheroidal graphite cast iron, vermicular cast iron, particularly austempering ductile iron came out, people had found a kind of without alloying, as long as and the graphite-structure that improves ironcasting just can significantly improve the method for cast iron intensity, and cost is low.The subject matter that today, high-intensity nodular iron casting, pieces of vermicular cast iron remained is that mass effect is big, compares with steel part, can't say that the quality stability of ironcasting is very reliable, and thin-wall complicated greatest problem is " sectional sensitivity is big ".Therefore cast iron Ni-V-Ti alloying and cast iron Ni-Cr-Mo alloying proposed by the invention has essential distinction.The purpose of Ni-V-Ti alloying just mainly is to improve " sectional sensitivity " of nodular iron casting, pieces of vermicular cast iron and " use properties " that some product needs especially, thickness thin such as the foundry goods wall or wall is very inhomogeneous, between wall and wall under the situation of structure very complicated (as internal combustion engine cylinders, bed piece etc.), can obtain also that casting yield is very high, foundry goods is organized everywhere evenly, the reliable foundry goods of steady quality, cast article also has very high fatigue resistance and special high-wearing feature, high heat-intensity, solidity to corrosion or the like simultaneously.
The purposes invention of therefore the most creative to Ni-V-Ti alloyed pig iron for casting of the present invention, novelty, practical value is when pushing away following three:
A kind of nickelic high vanadium hangs down titanium rare earth austempered ductile iron bent axle (the high V-of high Ni-hangs down Ti-RE austempering ductile iron I. C. engine crankshaft), it is characterized in that: (1) " selection " contains Ni 1.0-3.0%, V 0.5-1.5%, the Ni-V-Ti alloyed pig iron for casting of Ti＜0.1% is done raw material, and (note: this " selection " non-contriver is difficult to realize, this is because the inventor in order to make this ideal bent axle, finds the manufacture method of making this ideal composition pig iron just carried out experimental study and raw material investigation for many years.Realize this " selection ", even adopt method of the present invention in fact also can only make specially), thereby this bent axle has the hereditary property of Ni-V-Ti alloyed pig iron for casting of the present invention all the time; (2) this bent axle has following chemical components, C 3.0-3.8%, Si 2.0-2.8%, Mn 0.2-0.5%, P＜0.04%, S＜0.02%, Ni 0.8-3.0%, V 0.4-1.4%, Ti 0.02-0.08%, Cr 0.05-0.3%, RE 0.04-0.1%, the surplus trace element that is Fe and total amount less than Cr, Co, Cu etc. 0.2%.(3) this bent axle raw material with low titanium rare-earth nodularizer spheroidizing, casts out after breeding after fusing again, and foundry goods forms through shellfish isothermal quenching difficult to understand and meticulous mechanical workout.Foundry goods is the mixed structure of bainite and austenite (20%-40%), and the spheroidization of graphite rate is more than 85%, tensile strength α
b＞1200MPa, unit elongation δ＞10%, impact value α
k＞110J/cm
2
A kind of low Ni alum Ti rare earth alloy (low Ni-V-Ti-RE) hemisphere is partly wriggled cast iron car brakeing (clutch) element (as train brake shoe piece, automobile brake drum, retarding disc, clutch pressure plate etc.), it is characterized in that: (1) " selection " contains Ni0.12-0.3%, the Ni-V-Ti alloyed pig iron for casting of V0.25-0.5%Ti 0.04-0.6% is done raw material, form through fusing and with the rotten processing casting of low titanium rare earth alloy do, have the hereditary property of Ni-V-Ti alloyed pig iron for casting; (2) has following ingredients: C 3.5-4.0%, Si 2.2-3.0%, Mn 0.2-0.8%, P＜0.1%, S＜0.05%, Ni 0.1-0.3%, V0.2-0.5%Ti 0.03-0.16%, RE 0.03-0.1%, surplus is the Cr of Fe and total amount＜0.2%, Co, trace elements such as Cu; (3) this element is the pearlitic ferrite mixed matrix, nodularization rate 20-50%, nodulizing rate 80-50%; (4) this element wear resistance and heat-resistant anti-fatigue cracking damage performance be respectively the common grey iron element 2-5 doubly and 1-3 times.
Nickel vanadium titanium rare earth (middle Ni-V-Ti-RE) alloy vermicular cast iron internal combustion engine cylinders (cylinder cap, cylinder sleeve, machine element) in a kind of, it is characterized in that: (1) " selection " contains Ni 1.0-2.0%, V 0.3-0.6%, the Ni-V-Ti alloyed pig iron for casting of Ti 0.04-0.6% is done raw material, form through melting and adopting the processing of low wriggling of titanium rare earth alloy vermiculizer work after breeding, to cast again, have the Ni-V-Ti alloyed pig iron for casting hereditary property; (2) has following ingredients: C 3.0-3.8%, Si 2.0-2.8%, Mn 0.2-0.6%, P＜0.06%, S＜0.02%, Ni 1.0-2.0%, V0.3-0.6%, Ti 0.04-0.14%, RE 0.02-0.06%, surplus is Fe and total amount less than 0.2% Cr, Co, trace elements such as Cu; (3) this foundry goods has the ferritic-pearlitic mixed matrix, nodulizing rate＞75%; (4) this foundry goods has high homogeneity of structure and low scrap rate, its wear resistance, heat-resisting split seepage property and sea water corrosion resistant be plain cast iron spare 1-3 doubly.
The invention has the advantages that: the mineral resources such as horbachite, noumeite that contain of the common iron ore that adopt (1), vanadium titano-magnetite, nickel industry cut-off grade are enriched, and do not contend over raw materials with nickel industry; (2) ordinary blast that adopted is smelted method, vanadium titanium iron blast-furnace smelting method, and technology maturation, equipment is ready-made, energy expenditure is few, cost is low; (3) excellent product performance, of many uses, extensive market.
Embodiment 1: getting nickeliferous is 0.47%, iron content is 44.3%, sulfur-bearing is 38.4% the horbachite that contains, send vitriol works's roasting relieving haperacidity, obtain nickeliferous 0.58%, iron content 56.1%, the nickeliferous sulfate slag of sulfur-bearing 2.6%, should arrive-200 orders through the ball mill fine grinding by nickeliferous sulfate slag again, the coke powder of adding 8%, 2% bentonite, about 6% moisture, mixing granulation (2-6mm), send the sinter machine high temperature sintering, will carry out gravity treatment and magnetic separation after the sintered material fragmentation again, obtaining a kind of sulfur-bearing is 0.28%, iron content is 61.3%, and nickeliferous is 0.57% nickeliferous sulfate slag concentrate.This nickeliferous sulfate slag concentrate is sneaked in the v-ti magnetite concentrate agglomerate furnish component with 15% ratio, sinter basicity into and be about 1.73 self-fluxing nature mixed sintering ore deposit, press the pig iron containing vanadium smelting technology at last, make Ni-V-Ti alloyed pig iron for casting by vanadium titanium iron-smelting blast furnace.Its composition is: C 4.12%, and Si 0.42%, and Mn 0.47%, and P 0.06%, and S 0.04%, and Ni 1.19%, and V 0.38%, and Ti 0.27%, and Cr 0.12%, and Co 0.008%, and Cu 0.04%, and W 007%, and Nb 0.002%, Yu Weitie.
Embodiment 2: in the furnace charge of smelting conventional cast pig iron small furnace, evenly to add nickel content be 12.4% 214 kilograms of raw ferro nickels in batches and contain V by one ton of pig iron of every refining
2O
583 kilograms of 27.7% vanadium slags, all the other are by the batching and the melting technology of smelting the conventional cast pig iron, and the high vanadium of nickel hangs down the titanium Ni-V-Ti alloyed pig iron for casting in making, and its composition is: C 3.92%, Si 2.81%, Mn 0.37%, and P 0.057%, and S 0.038%, Ni 2.49%, V 0.97%, and Ti 0.04%, is Fe surplus the Cr 0.12%.
Embodiment 3, get and contain Ni 2.59%, V 0.97%, the Ni-V-Ti alloyed pig iron for casting of Ti 0.08% is made raw material, adding steel scrap etc. according to a conventional method melts in electric furnace, overheated, accurately allocate carbon equivalent, skim when the iron liquid temp reaches 1490 ± 20 ℃ and come out of the stove, carry out spheroidizing (actual nodularization rate reaches 87%) with low titanium rare earth Mg-Si alloy, after carrying out inoculation with 0.6% aluminium silicocalcium again, cast with metal pattern, carry out not exclusively waiting the high temperature quench treatment to obtain the mixed structure of bainite and austenite (36%) to foundry goods then, become the low titanium austempered ductile iron bent axle of nickelic high vanadium through meticulous mechanical workout again.Its fatigue strength, toughness and steel crankshaft are approaching, and wear resistance, damping property is better, and cost but reduces greatly.
Embodiment 4: get and contain Ni 0.26%, V 0.23%, the Ni-V-Ti alloyed pig iron for casting of Ti 0.25% is done raw material, need only allocate carbon according to a conventional method, the silicon amount melts in cupola furnace, with low titanium rare earth ferrosilicon alloy molten iron is gone bad and to cast after handling, foundry goods makes the low Ni alum Ti alloy hemisphere cast iron brake drum of partly wriggling through mechanical workout, and it is 2.8 and 1.3 times of existing plain cast iron brake drum that the wear resistance of this brake drum and heat-resistant anti-fatigue cracking damage performance.This foundry goods is the ferritic-pearlitic mixed matrix, contains 40.8% globular graphite.
Embodiment 5: get Ni 1.47%, V 0.44%, the Ni-V-Ti alloyed pig iron for casting of Ti 0.28% enters electrosmelting, accurately allocate the carbon silicone content according to a conventional method, iron liquid is come out of the stove at 1480 ± 20 ℃ and is bred with low titanium re-si-mg alloy wriggling processing and with 0.5% ferrosilicon, carry out ageing treatment after being cast into foundry goods, Ni-V-Ti alloyed vermicular cast iron in the acquisition (nodulizing rate is 88.3%) internal combustion engine cylinders foundry goods.
Claims (9)
1. Ni-V-Ti alloyed pig iron for casting, it is characterized in that described Ni-V-Ti alloyed pig iron contains following composition (weight percent): C 3.3-4.2%, Si 0.20-3.6%, Mn 0.3-1.0%, P＜0.1%, S＜0.05%, Ni 0.2-3.0%, V 0.2-1.5%, Ti0.04-0.6%, surplus is Fe and total amount less than trace elements such as 0.3% Cr, Cu, Co.
2. method of making Ni-V-Ti alloyed pig iron for casting as claimed in claim 1, it is characterized in that described method comprises: adopt nickeliferous sulfate slag to do raw material, through fine grinding, roasting, ore-dressing technique is handled, obtain sulphur content and be lower than 0.3%, iron-holder is higher than 50%, nickel content is higher than 0.2% nickeliferous sulfate slag concentrate, again by described Ni-V-Ti alloyed pig iron for casting composition proportion requirement, become self-fluxing nature mixed sintering (roasting pelletizing) ore deposit with v-ti magnetite concentrate mix sintering (roasting), again smelting in the blast furnace of this self-fluxing nature mixed sintering (roasting pelletizing) ore deposit input smelting pig iron containing vanadium is promptly got product.
3. the manufacture method of Ni-V-Ti alloyed pig iron as claimed in claim 2 is characterized in that described nickeliferous sulfate slag concentrate can be with rough basic carbonate nickel powder [3Ni (OH)
22NiCO
3] replace.
4. the manufacture method of Ni-V-Ti alloyed pig iron as claimed in claim 2 is characterized in that described self-fluxing nature mixed sintering (roasting pelletizing) ore deposit can use the mechanical mixture from dissolubility v-ti magnetite concentrate sintering (roasting pelletizing) ore deposit and raw ferro nickel to replace.
5. the manufacture method of Ni-V-Ti alloyed pig iron as claimed in claim 2, it is characterized in that described self-fluxing nature mixed sintering (roasting pelletizing) ore deposit, the mechanical mixture that adds rough ferronickel and vanadium slag with self-fluxing nature common iron ore concentrate sintered (roasting pelletizing) ore deposit replaces.
6. the manufacture method of Ni-V-Ti alloyed pig iron as claimed in claim 5 is characterized in that the mining common rich iron ore of described self-fluxing nature common iron ore concentrate sintered (roasting pelletizing) adds Wingdale and replaces.
7. the high V-of high Ni-that makes with Ni-V-Ti alloyed pig iron for casting hangs down Ti-RE alloy austenitic-bainite spheroidal graphite cast iron I. C. engine crankshaft, it is characterized in that described bent axle is to select for use to contain Ni 1.0-3.0%, V0.5-1.5%, the Ni-V-Ti alloyed pig iron for casting of Ti＜0.1% is done raw material, in fusion-casting process, do spheroidizing (nodularization rate＞85%) and breed the back casting with low titanium rare-earth nodularizer, and form through shellfish isothermal quenching difficult to understand and meticulous mechanical workout, described bent axle has the hereditary property of Ni-V-Ti alloyed pig iron for casting, its main alloying constituent is: C 3.0-3.8%, Si2.0-2.8% Mn:0.2-0.5%, P＜0.04%, S＜0.02%, Ni 0.8-3.0%, V 0.4-1.4%, Ti 0.02-0.08% Cr 0.05-0.3%, RE 0.04-0.1%, surplus is Fe and total amount less than 0.2% trace elements such as Cr.Co.Cu.
8. a low Ni-V-Ti-RE alloy hemisphere of being made by Ni-V-Ti alloyed pig iron for casting cast iron car brakeing (clutch) element of partly wriggling is characterized in that: 1.. this kind car brakeing (clutch) element is to select for use the Ni-V-Ti alloyed pig iron for casting that contains Ni 0.12-0.3% V 0.25-0.5% Ti 0.04-0.6% to do the raw material melting and add that low Ti rare earth alloy is rotten to be handled the back casting and form; 2. this kind car brakeing (clutch) element has the Ni-V-Ti alloyed pig iron for casting hereditary property, and its main alloying constituent is C 3.5-4.0%, Si 2.2-3.0%, Mn 0.2.0.8%, P＜0.1%, S＜0.05%, Ni 0.1-0.3%, V 0.2-0.5%, Ti 0.03-0.16%, RE 0.03-0.1%, surplus is Fe and total amount less than 0.2% Cr, Co, trace elements such as Cu.3. this car brakeing (clutch) element has the globular graphite of pearlitic ferrite mixed matrix and 20-50% and the quasiflake graphite of 80-50%, i.e. " hemisphere is partly wriggled " graphite-structure.
9. one kind by the made middle Ni-V-Ti-RE alloy vermicular cast iron internal combustion engine cylinders (cylinder cap, cylinder sleeve, machine element) of Ni-V-Ti alloyed pig iron for casting, it is characterized in that: 1. this kind internal combustion engine cylinders (cylinder cap, cylinder sleeve, machine element) is to select for use to contain Ni 1.0-2.0%, V 0.3-0.6%, the Ni-V-Ti alloyed pig iron for casting of Ti 0.04-0.6% is done raw material, and adds low titanium rare earth wriggling of vermiculizer and cast after inoculation and form; 2. this kind internal combustion engine cylinders (cylinder cap, cylinder sleeve, machine element) has the hereditary property of Ni-V-Ti alloyed pig iron for casting, and its main alloying constituent is: C 3.0-3.8%, Si 2.0-2.8%, Mn 0.2-0.6%, P＜0.06%, S＜0.02%, Ni 1.0-2.0%, V 0.3-0.6%, Ti 0.04-0.14%, RE 0.02-0.06%, surplus is Fe and total amount less than 0.2% Cr, Co, trace elements such as Cu.3. this kind internal combustion engine cylinders (cylinder cap, cylinder sleeve, machine element) has ferritic-pearlitic mixed matrix nodulizing rate＞75%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117746 CN1219602A (en) | 1996-10-16 | 1996-10-16 | Ni-V-Ti alloyed pig iron for casting and its manufacturing method and usage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117746 CN1219602A (en) | 1996-10-16 | 1996-10-16 | Ni-V-Ti alloyed pig iron for casting and its manufacturing method and usage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1219602A true CN1219602A (en) | 1999-06-16 |
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ID=5124568
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96117746 Withdrawn CN1219602A (en) | 1996-10-16 | 1996-10-16 | Ni-V-Ti alloyed pig iron for casting and its manufacturing method and usage |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818298A (en) * | 2010-05-20 | 2010-09-01 | 什邡市明日宇航工业股份有限公司 | Corrosion-resistant medium-silicon-molybdenum-nickel-cobalt nodular cast iron alloy |
| CN102242319A (en) * | 2011-06-17 | 2011-11-16 | 马鞍山市晨光高耐磨科技发展有限公司 | Formula of chromium-based tungsten nickel molybdenum highly wear-resistant alloy |
| CN103627949A (en) * | 2013-11-27 | 2014-03-12 | 攀钢集团研究院有限公司 | Smelting method of high-vanadium and high-manganese cast iron |
| CN108149142A (en) * | 2018-02-01 | 2018-06-12 | 广西超盛网络科技有限责任公司 | A kind of corrosion-resistant steel and preparation method thereof |
| CN110343945A (en) * | 2019-08-24 | 2019-10-18 | 浙江瓯赛汽车部件铸造有限公司 | A kind of casting material and resin-coated sand shell mould casting technique |
-
1996
- 1996-10-16 CN CN 96117746 patent/CN1219602A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818298A (en) * | 2010-05-20 | 2010-09-01 | 什邡市明日宇航工业股份有限公司 | Corrosion-resistant medium-silicon-molybdenum-nickel-cobalt nodular cast iron alloy |
| CN102242319A (en) * | 2011-06-17 | 2011-11-16 | 马鞍山市晨光高耐磨科技发展有限公司 | Formula of chromium-based tungsten nickel molybdenum highly wear-resistant alloy |
| CN103627949A (en) * | 2013-11-27 | 2014-03-12 | 攀钢集团研究院有限公司 | Smelting method of high-vanadium and high-manganese cast iron |
| CN103627949B (en) * | 2013-11-27 | 2015-09-16 | 攀钢集团研究院有限公司 | The smelting process of high vanadium height maganese cast iron |
| CN108149142A (en) * | 2018-02-01 | 2018-06-12 | 广西超盛网络科技有限责任公司 | A kind of corrosion-resistant steel and preparation method thereof |
| CN110343945A (en) * | 2019-08-24 | 2019-10-18 | 浙江瓯赛汽车部件铸造有限公司 | A kind of casting material and resin-coated sand shell mould casting technique |
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