CN102433494B - High-strength low-stress cast iron material and preparation process thereof - Google Patents
High-strength low-stress cast iron material and preparation process thereof Download PDFInfo
- Publication number
- CN102433494B CN102433494B CN 201110395293 CN201110395293A CN102433494B CN 102433494 B CN102433494 B CN 102433494B CN 201110395293 CN201110395293 CN 201110395293 CN 201110395293 A CN201110395293 A CN 201110395293A CN 102433494 B CN102433494 B CN 102433494B
- Authority
- CN
- China
- Prior art keywords
- parts
- controlled
- coke
- iron
- percent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000571 coke Substances 0.000 claims abstract description 50
- 229910052742 iron Inorganic materials 0.000 claims abstract description 30
- 238000005266 casting Methods 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000011081 inoculation Methods 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000004615 ingredient Substances 0.000 claims abstract description 5
- 238000010079 rubber tapping Methods 0.000 claims abstract description 3
- 238000002844 melting Methods 0.000 claims description 17
- 230000008018 melting Effects 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 11
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 11
- 229910000805 Pig iron Inorganic materials 0.000 claims description 11
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002667 nucleating agent Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- -1 65 8-12 parts Inorganic materials 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000004033 diameter control Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 4
- 238000009533 lab test Methods 0.000 claims description 4
- 238000004886 process control Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 230000001934 delay Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 3
- 238000009395 breeding Methods 0.000 claims description 2
- 230000001488 breeding effect Effects 0.000 claims description 2
- 238000007796 conventional method Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000126 substance Substances 0.000 abstract description 6
- 229910052710 silicon Inorganic materials 0.000 abstract description 5
- 229910052748 manganese Inorganic materials 0.000 abstract description 4
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- OOJQNBIDYDPHHE-UHFFFAOYSA-N barium silicon Chemical compound [Si].[Ba] OOJQNBIDYDPHHE-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a high-strength low-stress cast iron material and a preparation process thereof. The high-strength low-stress cast iron material is characterized by comprising the following chemical ingredients: 3 to 3.3 percent of C, 1.8 to 2.2 percent of Si, 0.8 to 1.0 percent of Mn, 0.1 to 0.25 percent of Cr, less than 0.12 percent of P, less than 0.1 percent of S and the balance iron. The preparation process of the cast iron material comprises the following steps that: (1) a 10-ton cupola furnace is adopted for smelting, the air quantity is controlled to be 150 to 160 m<3>/min, the air pressure is controlled to be 15 to 16 KPa, the bottom coke height is ensured to be controlled between 2300mm and 2400mm, and the carbon containing quantity is 3 to 3.3 percent; (2) the tapping temperature is controlled to be 1420 DEG C+/-10 DEG C; (3) the inoculation quantity is controlled to be 0.5 percent, and the chilling width after the inoculation is 0 to 2mm; and (4) the casting temperature is controlled to be in a range being 1360 DEG C to 1380 DEG C. The performance such as the strength, the hardness, the metallographic structure, the internal stress and the like of castings is obviously superior to that of the national standard specified requirement; the cracks and the deformation of the casting rib plates are eliminated, the heat treatment of the castings is not needed, the quality and the production efficiency of products are improved, and the production cost is saved.
Description
Technical field
The present invention relates to a kind of high strength low-stress cast iron materials and preparation technology, belong to material processing field.
Background technology
The high trade mark of traditional mode of production (HT300) gray iron casting, adopt the principle of low carbon low silicon low-carbon-equivalent, reach high strength casting, its chemical composition requires as follows: C:2.8-3.1 Si: 1.3-1.7 Mn1.0-1.2 P<0.12 S<0.12, and thus, casting strength and hardness reach requirement, but the foundry goods internal stress increases greatly, be prone to crackle, foundry goods corner hardness is high, is difficult for machining.And casting stress is large, foundry goods is yielding; In order to reduce the foundry goods internal stress, must heat-treat and could eliminate, could use the requirement reached.Like this, in process of production, the production cycle is longer, high expensive.Therefore if to develop a kind of tensile strength high, casting stress is little, and the novel material of good casting property, will seem very necessary.
Summary of the invention
One of purpose of the present invention is to provide a kind of high strength low-stress cast iron materials, adopts the principle of " low-carbon (LC)/high silicon/middle manganese adds alloy ", realizes the high strength low-stress.
Two of purpose of the present invention is to provide the manufacturing process of described a kind of high strength low-stress cast iron materials.
The present invention is the principle that adopts " low-carbon (LC)/high silicon/middle manganese adds alloy ", realize the high strength low-stress, its chemical Composition Control is as follows: all the other are iron for C3.00 ~ 3.3% Si1.8 ~ 2.2% Mn0.8 ~ 1.0 % P<0.12 % 0.5%≤S<0.10 % Cr0.1 ~ 0.25%; Strengthen the steel scrap amount during batching, reduce the quantity of original graphite, make the graphite impregnated with carbon in melting process enter in a large number iron liquid, increase eutectic cell quantity, suppress growing up of graphite.Silicone content improves, and is mainly to strengthen pregnant amount (adopting silicon barium composite inoculant) to promote greying, makes grain refining, thereby improves intensity and hardness, reduces casting stress.
One of purpose of the present invention is achieved in that the chemical composition of described high strength low-stress cast iron materials is: C:3-3.3%, Si:1.8-2.2%, Mn:0.8-1.0%, Cr:0.1-0.25%, p<0.12 %, 0.5%<S<0.1%; All the other are iron, and described percentage ratio is mass percent.
It is to be made by the raw material of following weight parts: 140-160 parts of the Z18 pig iron, 190-210 parts of foundry returns, 580-610 parts of steel scraps, Cr content be 1.5% containing 55-65 parts of chromium steel scraps, 75 12-18 parts of ferrosilicon, 65 8-12 parts, ferromanganese, 90-110 parts of coke charges, 30-35 parts, Wingdale; Wherein: nucleating agent accounts for 0.5% of total weight parts, bed coke height 2300-2400mm.
Preferably: by the raw material of following weight parts, made: 150 parts of the Z18 pig iron, 200 parts of foundry returns, 530 parts of steel scraps, containing 60 parts of chromium steel scraps wherein Cr content be 15 parts of 1.5%, 75 ferrosilicon, 65 10 parts, ferromanganese, 100 parts of coke charges, 33 parts, Wingdale, wherein: nucleating agent accounts for total weight parts 0.5%, bed coke height 2300-2400mm, described percentage ratio is mass percent.
Two of purpose of the present invention is achieved in that
(1) adopt 10 tons of cupola meltings, air quantity is controlled at 150 ~ 160m
3/ min, blast is controlled at 15-16KPa, constantly adds relay Jiao, guarantees that bed coke height is at 2300-2400mm; Thereby guarantee that carbon content is within 3-3.3% scope;
(2) tapping temperature is controlled at 1420 ℃ ± 10 ℃;
(3) pregnant amount is controlled at 0.5%, and the spoken parts in traditional operas width after breeding is within 2mm;
(4) within teeming temperature is controlled at 1360 ℃ of-1380 ℃ of scopes;
Inoculation method adopts the method that pours; During single bag cast, process according to a conventional method, two bags are simultaneously during casting large-size castings; After a bag fills, another bag needs to wait person more than 20 minutes to take: the first bag first connects 2/3rds required iron water amounts and waits for; After the second bag is handled, then the first bag is added to 1/3rd molten iron and carries out inoculation.Shorten the incubation time between two bags, prevent inoculation fade.
Preferably: adopt the large spacing two outlet opening of 10T/H cupola furnace to carry out melting, its burn-off rate is controlled at 10-12T/H, and coke-iron-rate is 1:7.5-8.5; Its preparation technology is as follows:
1. calculate reinforced material list by various raw-material results of laboratory test, single batch of iron charge is 1000 parts, and material list is: 140-160 parts of the Z18 pig iron, 190-210 parts of foundry returns, 580-610 parts of steel scraps, Cr content be 1.5% containing 55-65 parts of chromium steel scraps, 75 12-18 parts of ferrosilicon, 65 8-12 parts, ferromanganese, 90-110 parts of coke charges, 30-35 parts, Wingdale, nucleating agent accounts for total weight parts 0.5%, bed coke height 2300-2400mm;
2. the preparation before blow-on: at first principal dimension in burner hearth is checked: melting zone diameter is controlled at 1200-1400mm, and the tuyere zone diameter control is at 960-1000mm, and upper exhaust outlet angle 4-6 is spent, lower air draft canthus degree 8-12 degree; Select bed coke, adopt the secondary foundry coke, fixed carbon content is greater than 85%, and lumpiness is 150-250mm, and other compositions are in the scope of GB regulation;
3. blow-on process control: at the bottom of cupola drop, and complete to protect furnace bottom with firewood, first add 2/3 bed coke, then igniting, baker 1.8-2.2 hours, after bottom firewood and coke perfect combustion, seal fire door, putting in blast, observe the color of charging opening flare, if the heart section of flare is white in color, blowing-out adds remaining 1/3 bed coke, measure bed coke height, add bed coke while not reaching, after reaching the scope of 2300-2400mm, start to feed in raw material, order of addition(of ingredients) is: the pig iron → foundry returns → steel scrap → 75 ferrosilicon, 65 ferromanganese → coke charge → Wingdale, after filling it up with material, after stewing stove 15 ~ 30min, the air-supply melting, air quantity is controlled at 150 ~ 160m
3/ min, blast is controlled at 15 ~ 16KPa,, normally blows in early stage simultaneously, and the forehearth slag notch is opened, and the forehearth cupola well is carried out to pre-heating drying,
4. molten iron is processed and cast: molten iron is melting is to after a certain amount of, temperature is controlled at 1450 ~ 1480 degree and comes out of the stove, add Si ~ Ba of 0.5% ~ Ca nucleating agent in iron notch simultaneously, making it current-following inoculation enters in hot metal ladle, improve graphite form, crystal grain thinning, improve the homogeneity of organizing, and delays the inoculation fade time;
Pulled out the slag processing after discharging molten iron, prevented that bits from entering casting mold; After required molten iron is ready to, the preparation work before pouring into a mould, teeming temperature is controlled at
1360-1380 ℃, the scum silica frost of front cleaning casting ladle mouth that waters, and add insulating covering agent after thermometric, temperature, in claimed range, is poured into a mould, and pours into foundry goods, after casting complete, according to the casting parts thermal insulation processing requirement, is incubated.
The above percentage ratio is mass percent.
The present invention by the adjustment to the product chemical composition, particularly add ferrochrome, directly improves the inherence tissue of product, has improved intensity and the hardness of foundry goods; Intensifies process is controlled and inoculation, has effectively improved material property, reduces the internal stress of product.By to high strength low-stress novel material research experiment, its castability is good; Be foundry goods in identical chemical composition situation, the performances such as the intensity of foundry goods, hardness, metallographic structure and internal stress obviously are better than the GB specified requirement; The foundry goods internal stress obviously descends, and eliminates foundry goods gusset crackle and distortion, and foundry goods no longer needs thermal treatment, has improved quality and the production efficiency of product, has saved production cost.Only reduce anneal, year to produce 10000 tons, year can save production cost: 80.6 ten thousand yuan.Quality product is significantly improved simultaneously, and processing characteristics and use properties are good, are a kind of casting novel materials that can stablize use.
Embodiment
The present invention can specifically implement by the technology illustrated in summary of the invention, and by the following examples can the invention will be further described, yet scope of the present invention is not limited to following embodiment.
Embodiment 1:
The production HTM4228G-1800-10101 lathe bed of take is example, casting weight 17.35T, poured weights 21T, it is as follows that it has suffered controlling of production process: adopt the large spacing two outlet opening of 10T/H cupola furnace to carry out melting, its burn-off rate is controlled at 10-12T/H, and coke-iron-rate is 1:8
1. charge calculation at first: by various raw-material results of laboratory test, calculate reinforced material list, single batch of iron charge is 1 ton, and material list is: Z18 pig iron 150Kg, foundry returns 200Kg, steel scrap 530Kg, containing chromium steel scrap 60 Kg(wherein Cr content be 1.5%), 75 ferrosilicon 15Kg, 65 ferromanganese 10Kg, nucleating agent 0.5%, bed coke height 2300mm, coke charge 100Kg, Wingdale 33Kg.
2. the preparation before blow-on: at first principal dimension in burner hearth is checked: melting zone diameter is controlled at 1300mm, and the tuyere zone diameter control is at 980mm, and upper exhaust outlet angle 5 is spent, lower air draft canthus degree 10 degree; Inboard wall of burner hearth is smooth, and the forehearth cupola well is checked, after size is qualified, with firewood, is toasted.Select bed coke, the size of bed coke and highly be directly connected to molten iron temperature and the height of cupola furnace carburetting coefficient, so bed coke will pass through strict selecting.My company adopts Zhenjiang, Jiangsu secondary foundry coke, and fixed carbon content is greater than 85%, and lumpiness is 150-250mm, and other compositions are in the scope of GB regulation.
3. blow-on process control: after stove principal dimension passed examination, at the bottom of cupola drop, and complete to protect furnace bottom with firewood, first add 2/3 bed coke, then igniting, baker 2 hours is after bottom firewood and coke perfect combustion, seal fire door, putting in blast, observe the color of charging opening flare, if the heart section of flare is white in color, the bed coke perfect combustion added is described, blowing-out adds remaining 1/3, measure bed coke height, add bed coke while not reaching, after reaching 2300mm, start to feed in raw material, order of addition(of ingredients) is: the pig iron → foundry returns → steel scrap → ferrosilicon, ferromanganese → coke charge → Wingdale, after filling it up with material, after stewing stove 15 ~ 30min, the air-supply melting, air quantity is controlled at 150 ~ 160m
3/ min left and right, blast is controlled at 15 ~ 16KPa,, normally blows in early stage simultaneously, the forehearth slag notch is opened, be mainly that the forehearth cupola well is carried out to pre-heating drying.
4. molten iron is processed and cast: molten iron is melting is to after a certain amount of, temperature is controlled at 1450 ~ 1480 degree and comes out of the stove, add Si ~ Ba of 0.5% ~ Ca nucleating agent in iron notch simultaneously, making it current-following inoculation enters in hot metal ladle, improve graphite form, crystal grain thinning, improve the homogeneity of organizing, and delays the inoculation fade time.Pulled out the slag processing after discharging molten iron, prevented that bits from entering casting mold.After required molten iron is ready to, the preparation work before pouring into a mould, accomplish " high temperature is come out of the stove, cast cold ", and teeming temperature is controlled at
1360-1380 ℃, the scum silica frost of front cleaning casting ladle mouth that waters, and add insulating covering agent after thermometric, temperature, in claimed range, is poured into a mould, and follows the principle of " fast-slow-fast ", and pouring speed is controlled in the scope of requirement, carries out the igniting bleed.
5. subsequent disposal: after casting complete, according to the casting parts thermal insulation processing requirement, be incubated, as the HTM4228G-1800-10101 lathe bed, after being incubated 4 days, unpack, knockout.
6. through cleaning polishing, ball blast, paint, warehousing after passing.
Claims (3)
1. the preparation technology of a high strength low-stress cast iron materials, it is to be made by the raw material of following weight parts: single batch of iron charge is 1000 parts, material list is: 140-160 parts of the Z18 pig iron, 190-210 parts of foundry returns, 580-610 parts of steel scraps, Cr content be 1.5% containing 55-65 parts of chromium steel scraps, 75 12-18 parts of ferrosilicon, 65 8-12 parts, ferromanganese, 90-110 parts of coke charges, 30-35 parts, Wingdale is characterized in that:
(1) adopt 10 tons of cupola meltings, air quantity is controlled at 150 ~ 160m
3/ min, blast is controlled at 15-16KPa, constantly adds relay Jiao, guarantees that bed coke height is at 2300-2400mm; Thereby guarantee that carbon content is within 3-3.3% scope;
(2) tapping temperature is controlled at 1420 ℃ ± 10 ℃;
(3) pregnant amount is controlled at 0.5%, and the spoken parts in traditional operas width after breeding is within 2mm;
(4) within teeming temperature is controlled at 1360 ℃ of-1380 ℃ of scopes;
Described inoculation method adopts the method that pours; During single bag cast, process according to a conventional method, two bags are simultaneously during casting large-size castings; After a bag fills, another bag needs to wait in the situation more than 20 minutes and must take: the first bag first connects 2/3rds required iron water amounts and waits for; After the second bag is handled, then the first bag is added to 1/3rd molten iron and carries out inoculation;
Described percentage ratio is mass percent.
2. the preparation technology of a kind of high strength low-stress cast iron materials according to claim 1, is characterized in that adopting the large spacing two outlet opening of 10T/H cupola furnace to carry out melting, and its burn-off rate is controlled at 10-12T/H, and coke-iron-rate is 1:7.5-8.5; Its preparation technology is as follows:
1. calculate reinforced material list by various raw-material results of laboratory test, single batch of iron charge is 1000 parts, and material list is: 140-160 parts of the Z18 pig iron, 190-210 parts of foundry returns, 580-610 parts of steel scraps, Cr content be 1.5% containing 55-65 parts of chromium steel scraps, 75 12-18 parts of ferrosilicon, 65 8-12 parts, ferromanganese, 90-110 parts of coke charges, 30-35 parts, Wingdale, nucleating agent accounts for total weight parts 0.5%, bed coke height 2300-2400mm;
2. the preparation before blow-on: at first principal dimension in burner hearth is checked: melting zone diameter is controlled at 1200-1400mm, and the tuyere zone diameter control is at 960-1000mm, and upper exhaust outlet angle 4-6 is spent, lower air draft canthus degree 8-12 degree; Select bed coke, adopt the secondary foundry coke, fixed carbon content is greater than 85%, and lumpiness is 150-250mm, and other compositions are in the scope of GB regulation;
3. blow-on process control: at the bottom of cupola drop, and complete to protect furnace bottom with firewood, first add 2/3 bed coke, then igniting, baker 1.8-2.2 hours, after bottom firewood and coke perfect combustion, seal fire door, putting in blast, observe the color of charging opening flare, if the heart section of flare is white in color, blowing-out adds remaining 1/3 bed coke, measure bed coke height, add bed coke while not reaching, after reaching the scope of 2300-2400mm, start to feed in raw material, order of addition(of ingredients) is: the pig iron → foundry returns → steel scrap → 75 ferrosilicon, 65 ferromanganese → coke charge → Wingdale, after filling it up with material, after stewing stove 15 ~ 30min, the air-supply melting, air quantity is controlled at 150 ~ 160m
3/ min, blast is controlled at 15 ~ 16KPa,, normally blows in early stage simultaneously, and the forehearth slag notch is opened, and the forehearth cupola well is carried out to pre-heating drying,
4. molten iron is processed and cast: molten iron is melting is to after a certain amount of, temperature is controlled at 1450 ~ 1480 degree and comes out of the stove, add Si ~ Ba of 0.5% ~ Ca nucleating agent in iron notch simultaneously, making it current-following inoculation enters in hot metal ladle, improve graphite form, crystal grain thinning, improve the homogeneity of organizing, and delays the inoculation fade time;
Pulled out the slag processing after discharging molten iron, prevented that bits from entering casting mold; After required molten iron is ready to, the preparation work before pouring into a mould, teeming temperature is controlled at
1360-1380 ℃, the scum silica frost of front cleaning casting ladle mouth that waters, and add insulating covering agent after thermometric, temperature, in claimed range, is poured into a mould, and pours into foundry goods, after casting complete, according to the casting parts thermal insulation processing requirement, is incubated;
Described percentage ratio is mass percent.
3. the preparation technology of a kind of high strength low-stress cast iron materials according to claim 1 and 2, is characterized in that adopting the large spacing two outlet opening of 10T/H cupola furnace to carry out melting, and its burn-off rate is controlled at 10-12T/H, and coke-iron-rate is 1:8; Its preparation technology is as follows:
1. calculate reinforced material list by various raw-material results of laboratory test, single batch of iron charge is 1000 Kg, and material list is: Z18 pig iron 150Kg, foundry returns 200Kg, steel scrap 590Kg, containing chromium steel scrap 60 Kg wherein Cr content be 1.5%, 75 ferrosilicon 15Kg, 65 ferromanganese 10Kg, nucleating agent 0.5%, bed coke height 2300mm, coke charge 100Kg, Wingdale 33Kg;
2. the preparation before blow-on: at first principal dimension in burner hearth is checked: melting zone diameter is controlled at 1300mm, and the tuyere zone diameter control is at 980mm, and upper exhaust outlet angle 5 is spent, lower air draft canthus degree 10 degree; Select bed coke, adopt the secondary foundry coke, fixed carbon content is greater than 85%, and lumpiness is 150-250mm, and other compositions are in the scope of GB regulation;
3. blow-on process control: at the bottom of cupola drop, and complete to protect furnace bottom with firewood, first add 2/3 bed coke, then igniting, baker 2 hours, after bottom firewood and coke perfect combustion, seal fire door, putting in blast, observe the color of charging opening flare, if the heart section of flare is white in color, blowing-out adds remaining 1/3 bed coke, measure bed coke height, add bed coke while not reaching, after reaching 2300mm, start to feed in raw material, order of addition(of ingredients) is: the pig iron → foundry returns → steel scrap → 75 ferrosilicon, 65 ferromanganese → coke charge → Wingdale, after filling it up with material, after stewing stove 15 ~ 30min, the air-supply melting, air quantity is controlled at 150 ~ 160m
3/ min, blast is controlled at 15 ~ 16KPa,, normally blows in early stage simultaneously, and the forehearth slag notch is opened, and the forehearth cupola well is carried out to pre-heating drying,
4. carry out again molten iron processing and cast and pulled out slag and process;
Described percentage ratio is mass percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110395293 CN102433494B (en) | 2011-12-02 | 2011-12-02 | High-strength low-stress cast iron material and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110395293 CN102433494B (en) | 2011-12-02 | 2011-12-02 | High-strength low-stress cast iron material and preparation process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102433494A CN102433494A (en) | 2012-05-02 |
| CN102433494B true CN102433494B (en) | 2013-06-12 |
Family
ID=45981840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110395293 Expired - Fee Related CN102433494B (en) | 2011-12-02 | 2011-12-02 | High-strength low-stress cast iron material and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102433494B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888484A (en) * | 2012-09-11 | 2013-01-23 | 安徽泾县金泰机械有限公司 | Method for producing high-strength cast iron by using waste iron and steel |
| CN103484592B (en) * | 2013-09-02 | 2014-12-31 | 遵义市红花岗区自强铸造有限责任公司 | High-strength inoculated casting and manufacturing method thereof |
| CN107245685A (en) * | 2017-07-12 | 2017-10-13 | 安徽埔义传动机械有限公司 | A kind of high-quality integral type zinc pot and its pouring procedure |
| CN107619987A (en) * | 2017-08-01 | 2018-01-23 | 六安市龙兴汽车零部件有限公司 | A kind of full steel scrap production casting iron craft |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210296A (en) * | 2007-12-21 | 2008-07-02 | 盐城多为集团有限公司 | Low-chromium copper alloy gray cast iron and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001207218A (en) * | 2000-01-26 | 2001-07-31 | Mazda Motor Corp | Cast iron member and producing method thereof |
-
2011
- 2011-12-02 CN CN 201110395293 patent/CN102433494B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210296A (en) * | 2007-12-21 | 2008-07-02 | 盐城多为集团有限公司 | Low-chromium copper alloy gray cast iron and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2001-207218A 2001.07.31 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102433494A (en) | 2012-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102409238B (en) | 42CrMo alloy constructional steel super-thick plate and production method thereof | |
| CN104120332B (en) | High-intensity high-tenacity spheroidal graphite cast-iron 600-10 and production technology thereof | |
| CN101654738B (en) | Method for smelting chromated-nickel-containing molten iron by mixing iron scale and dedusting ash of stainless steel | |
| CN103820704B (en) | Form in High Nickel Austenite Nodular Cast Iron material of vehicle turbine housing and preparation method thereof | |
| CN102345054B (en) | 120mm low temperature pressure vessel 16MnDR steel thick plate and production method thereof | |
| CN104846265B (en) | A kind of ultralow temperature austenite abrasion-proof magnesium iron material and preparation method thereof | |
| CN102094147B (en) | Control method for producing low temperature spheroidal graphite cast iron | |
| CN103146990B (en) | Vehicle turbine housing high silicon molybdenum chromium magnesium iron material and preparation method thereof | |
| CN105385802A (en) | Casting technique for low-temperature high-tenacity nodular cast iron butterfly valve body | |
| CN104561772B (en) | A kind of 130mm~150mm thickness ultralow temperature steel plate and its production method | |
| CN105349750B (en) | High annealing drop-bottom and its manufacture method | |
| CN105385935B (en) | A kind of high silicon molybdenum vermicular cast iron and its production method | |
| CN102433494B (en) | High-strength low-stress cast iron material and preparation process thereof | |
| CN103725967B (en) | 120mm specification following SCMV4-2 pressure vessel steel thick plate and production method | |
| CN104152793B (en) | QT500-7 heavy section casting quality and the method for Composition Control | |
| CN101956130A (en) | Large-thickness rolled steel plate instead of case one for large-sized ball mill and production method thereof | |
| CN108149134A (en) | A kind of high temperature pressure vessel 12Cr2Mo1VR steel plates and its production method | |
| CN106435342A (en) | Casting technology of low-temperature and high-tenacity spheroidal graphite cast iron butterfly valve containing carbides | |
| CN110343949A (en) | HRB400E high-strength anti-seismic steel bar production method and steel containing niobium vanadium | |
| CN110042281A (en) | A kind of cast aluminium alloy gold and preparation method thereof | |
| CN101724783A (en) | Heat resisting type alloy structure steel plate and method for producing same | |
| CN101660083B (en) | High-performance vermicular cast iron for oven protecting iron pieces of coke oven | |
| CN102260767A (en) | Method for producing minus 40 DEG C low temperature casting-state nodular graphite cast iron with large cross section | |
| CN103103433A (en) | New material for cylinder jacket and casting process thereof | |
| CN107604241B (en) | - 50 DEG C of iron casting and its casting method for bullet train electric machine stand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 |