CN106636879A - Nodular cast iron roll barrel and preparation method thereof - Google Patents
Nodular cast iron roll barrel and preparation method thereof Download PDFInfo
- Publication number
- CN106636879A CN106636879A CN201710078216.3A CN201710078216A CN106636879A CN 106636879 A CN106636879 A CN 106636879A CN 201710078216 A CN201710078216 A CN 201710078216A CN 106636879 A CN106636879 A CN 106636879A
- Authority
- CN
- China
- Prior art keywords
- roll
- iron
- spheroidal graphite
- preparation
- raw material
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
Abstract
The invention discloses a nodular cast iron roll barrel and relates to the field of nodular cast iron. The nodular cast iron roll barrel comprises the following components including, by weight, 3.85-3.88% of C, 1.80-1.90% of Si, less than or equal to 0.10% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.35-0.50% of Mo, 0.70-0.85% of Ni, less than or equal to 0.025% of Ti, 0.0030-0.0050% of RE, 0.030-0.045% of Mg and the balance Fe and inevitable impurities, and the content of Cr, Pb and V is less than or equal to 0.020%. The problem that casting defects such as shrinkage porosity, shrinkage cavities, slag inclusion, sand inclusion and cracks are prone to occurring to large nodular cast iron roll barrels in the prior art is solved. The invention further provides the zero-defect nodular cast iron roll barrel and a preparation method of the nodular cast iron roll barrel.
Description
Technical field
The present invention relates to the technical field of spheroidal graphite cast-iron, more particularly to the spheroidal graphite roll body of roll and preparation method thereof.
Background technology
With the exploitation and application of new rolling mill practice and rolling technique, Rolling production is towards maximizing, high speed and from
The direction of dynamicization is developed, while putting forward higher requirement to the performance and service life of roll.Roll (especially works
Roller) it is main consumable part in steel rolling equipment, its life-span and performance play key to operating rate of rolling mill and product quality
The effect of property.Therefore the monoblock cast roll of single material can not meet requirement.Thus body of roll working lining and body of roll center portion
The composite roll cast using unlike material is rapidly developed.The body of roll working lining of composite roll using wear-resisting, chipping resistance,
Resistance to roughening, the alloy material of resistance to hot tearing, and body of roll center portion and roll neck are then using the spheroidal graphite cast-iron with good strength and toughness.
Such roll has good rolling performance and the anti-performance that fractures simultaneously, thus is widely adopted.
Have problems in that after the processing of existing large scale roll barrel (external diameter is more than 1000mm)：Easily there is contracting
The casting flaws such as pine, shrinkage cavity, slag inclusion, burning into sand and crackle；Cannot be detected by 100% ultrasonic examination and magnetic powder inspection.
The content of the invention
It is an object of the invention to provide spheroidal graphite roll body of roll of a kind of zero-fault and preparation method thereof.
The technical scheme is that：A kind of spheroidal graphite roll body of roll, including following weight percent composition：
C：3.85-3.88%；Si：1.80-1.90%；Mn≤0.10%；P≤0.020%；S≤0.010%；Mo：
0.35-0.50%；Ni：0.70-0.85%；Ti≤0.025%；Cr+Pb+V≤0.020%；RE：0.0030-0.0050%；
Mg：0.030-0.045% and balance iron and can not the removal of impurity.
In the above-mentioned spheroidal graphite roll body of roll, described body of roll wall thickness is 75-80mm, external diameter Φ 1654mm, length
1890mm。
In the above-mentioned spheroidal graphite roll body of roll, described body of roll two ends are the axle of Φ 310mm, and one end length is
340mm, other end length 675mm.
In the present invention, it is above-mentioned size to be not particularly limited the body of roll, and this programme here is only to emphasize that this programme is preferably fitted
For the making of large-sized body of roll.In actual applications, obtained by the spheroidal graphite cast-iron of said components roll barrel generally can not
The defect of detection is present.
Meanwhile, the invention also discloses a kind of preparation method of the spheroidal graphite roll body of roll, comprises the steps：
Step 1：Raw material is melted into into iron liquid at a temperature of 1490-1510 DEG C, after nitrogen flushing desulfurization in desulphurised hot metal bag
Adjusting component should meet the following requirements C：3.85-3.88%；Si：0.65-0.75%；Mn≤0.10%；P≤0.020%；S≤
0.010%；Ti≤0.025%；Cr+Pb+V≤0.020% and balance iron and can not the removal of impurity；
Step 2：Iron liquid after step 1 desulfurization is warming up to into 1470-1480 DEG C, going out iron liquid carries out spheroidising and womb
Reason；
Step 3：The iron liquid that step 2 is obtained is entered into resin bonded sand mould under conditions of 1380-1390 DEG C by running gate system
Casting becomes the body of roll, filling time：The 64-97 seconds.
In the preparation method of the above-mentioned spheroidal graphite roll body of roll, it is 70-80 that described raw material is mass ratio:20-30
High-purity pig iron and packing steel scrap；
Wherein, the mass percent of each component of high-purity pig iron is：C：4.35；Si：0.50；Mn：0.062；P：0.021；
S：0.012；Ti：0.022；Cr：0.011；Ni：0.006；Mo：0.002；V：0.010；Pb：0.0006 and the iron and not of surplus
Can the removal of impurity；
The mass percent of each component of packing steel scrap is：C：0.021；Si：0.25；Mn：0.13；P:0.011；S：
0.014；Ti：0.015；The iron of V≤0.0010 and surplus and can not the removal of impurity.
In the preparation method of the above-mentioned spheroidal graphite roll body of roll, the nodulizer addition used in spheroidising is such as
Under：
The weight ratio of heavy rare earth nodulizer and light rare earth nodulizer is 30:70, total addition accounts for the 1.0- of raw material gross weight
1.1%.
In the preparation method of the above-mentioned spheroidal graphite roll body of roll, described inoculation is divided into three steps to be carried out：
Inoculation：75SiFe inovulants and nodulizer are added in molten iron simultaneously, an inoculation is carried out；
75SiFe inovulants account for the 0.5% of raw material gross weight；
Late inoculation process：High calcium barium inovulant is added when iron liquid 2/3rds are gone out, it is total that high calcium barium inovulant accounts for raw material
The 0.5% of weight；
Three inoculations：Sulphur oxygen inovulant is placed in cup, sulphur oxygen inovulant accounts for the 0.2% of raw material gross weight.
75SiFe inovulant ingredient ws t%：Si：73.51；Al：1.34；Remaining Fe；
High calcium barium inovulant ingredient w t%：Si：72.99；Ca：1.25；Ba：2.97；Al：1.25；Remaining Fe；
Sulphur oxygen inovulant wt%：Si：74；Ca：0.74；Ce：1.68；Al：0.94；S, appropriate O；Remaining Fe；Granularity：0.7-
2mm。
In the preparation method of the above-mentioned spheroidal graphite roll body of roll, described step 3 is entered in bottom gating
OK, described bottom gating include sprue, semi-circular cross gate, ceramic foam filter and ingate, iron liquid by
Cup enters sprue, enters back into semi-circular cross gate, then enters Reform of Resin Sand Casting into ingate by ceramic foam filter
Type；Wherein, sprue, semi-circular cross gate, the ratio of the cross-sectional area of ingate are：FDirectly：FIt is horizontal：FIt is interior=1:0.95:1.
Its sprue, semi-circular cross gate, the ratio of the cross-sectional area of ingate are obtained through repetition test, can
Ensure that quick and stable fills type, prevent product defects appearance.
In the preparation method of the above-mentioned spheroidal graphite roll body of roll, described sprue is Φ 120mm earthenwares；It is horizontal to pour
Road is 80/100mm × 120mm；Ingate is Φ 30mm earthenwares 16.
In the preparation method of the above-mentioned spheroidal graphite roll body of roll, the upper shaft of the described body of roll places 1 Φ
250mm exothermic risers.
Beneficial effects of the present invention are as follows：
Tensile strength R of the spheroidal graphite roll body of roll of the present inventionm>=370MPa, yield strength Rp0.2 >=240MPa, breaks
Elongation A afterwards>12%, normal temperature ballistic work>12J.The ultrasonic examination of cast(ing) surface 100% and magnetic powder inspection, must not there is shrinkage porosite, contracting
The casting flaws such as hole, slag inclusion, burning into sand and crackle.After foundry goods finishing simultaneously, 100% ultrasonic examination and magnetic powder inspection are carried out,
There must not be any defect.Ultrasonic velocity is no less than 5800m/s.
This large scale spheroidal graphite roll body of roll has reached the requirement of the zero-fault of foreign client.
Description of the drawings
Fig. 1 is the foundry goods body Oxygen potential of the embodiment of the present invention 1 and the Electronic Speculum of 100 times of graphite size and form (before corrosion)
Figure；
Fig. 2 is the electron microscope of 100 times of foundry goods body matrix (after corrosion) of the embodiment of the present invention 1；
Fig. 3 is the structural representation of the bottom gating of the embodiment of the present invention 1.
Specific embodiment
With reference to specific embodiment, technical scheme is described in further detail, but do not constitute it is right
Any restriction of the present invention.
Embodiment 1
1.1 raw materials prepare：
The overall raw material of the spheroidal graphite roll body of roll is required：C：3.85%；Si：1.80%；Mn≤0.10；P≤
0.020；S≤0.010；Mo：0.35%；Ni：0.70%；Ti≤0.025%；Cr+Pb+V≤0.020%；RE：0.0030%；
Mg：0.030%.
In the present embodiment, in order to reach above-mentioned ingredient requirement, raw material of the present invention be high-purity pig iron and
The mixing of the packing steel scrap of high-quality, high-purity pig iron：Packing steel scrap=70 of high-quality:30；It should be noted that in actual production
Cheng Zhong, is strict with the combination of the packing steel scrap for high-purity pig iron and high-quality, it is any can reach above-mentioned overall raw material will
The requirement of the present embodiment is met by the iron asked, the present embodiment is adopted in line with starting point that is cost-effective and improving the market competitiveness
Raw material of the mixing of the packing steel scrap of high-purity pig iron and high-quality as the present embodiment.
High-purity pig iron (%)：C：4.35；Si：0.50；Mn：0.062；P：0.021；S：0.012；Ti：0.022；Cr：
0.011；Ni：0.006；Mo：0.002；V：0.010；Pb：0.0006.
The packing steel scrap (%) of high-quality：C：0.021；Si：0.25；Mn：0.13；P:0.011；S：0.014；Ti：0.015；V
≤0.0010。
2.1 by raw material：High-purity pig iron：Packing steel scrap=80 of high-quality:20 add in 15 tons of electric induction furnaces, are fused into liquid
State, temperature reaches 1500 DEG C, after carrying out the outer nitrogen flushing desulfurization of stove, refunds in stove and adjusting component, reaches following requirements：C：
3.85%；Si：0.65%；Mn≤0.10；P≤0.020；S≤0.010.
The good iron liquid of composition adjustment is warming up to 1475 DEG C by 2.2, and going out iron liquid carries out spheroidising, and nodulizer addition is such as
Under：
Heavy rare earth nodulizer：Light rare earth nodulizer=30:70, total addition：1.0%
2.3 carry out following inoculation in spheroidizing process：
2.3.1 inovulant (75SiFe) (composition %：Si：73.51；Al：1.34；Remaining Fe)：0.5% is pressed on nodulizer
Face, carries out an inoculation；
2.3.2 high calcium barium inovulant (composition %：Si：72.99；Ca：1.25；Ba：2.97；Al：1.25；Remaining Fe)：0.5%
Add when iron liquid 2/3rds are gone out, carry out late inoculation process；
2.3.3 sulphur oxygen inovulant (composition %：Si：74；Ca：0.74；Ce：1.68；Al：0.94；S, appropriate O；Remaining Fe；Grain
Degree：0.7-2mm)：0.2% is placed in the special cup of quantitative plug formula, carries out third time inoculation.
2.3.4 the body of roll casting pouring temperature is：1390 DEG C, filling time：74 seconds.
Bottom gating in this step shown in Fig. 3, sprue 1 and ingate 3 adopt the earthenware of different-diameter,
150mm × 150mm × 32mm ceramic foam filters 4 are placed for 2 times in cross gate amount to 16.In order to quick and stable fills type, adopt
With the special cup of quantitative plug formula and semi-circular cross gate, running gate system section area ratio is FDirectly：FIt is horizontal：FIt is interior=1:0.95:1.
Specially：The earthenwares of sprue Φ 120；Cross gate 80/100 × 120；Ingate：30 earthenwares of Φ 16.In body of roll upper shaft
Place 1 Φ 250mm exothermic riser.
(2) according to the computing formula of the heavy gray iron casting duration of pouring
T-duration of pouring (s) in formula.
GL- type inner metal liquid gross weight (kg)；Iron liquid weight needed for the foundry goods is 10500kg.
S2- wall thickness coefficient, as casting section thickness 40～80mm of ＞, S2 takes 1.9.
While the G. Iron Castings duration of pouring presses the determination of gray iron casting duration of pouring computational methods, then calculate by 1/3～1/2.
Therefore
It is thus determined that the duration of pouring is：The 64-97 seconds.
Embodiment 2
1.1 raw materials prepare：
The overall raw material of the spheroidal graphite roll body of roll is required：C：3.88%；Si：1.90%；Mn≤0.10；P≤
0.020；S≤0.010；Mo：0.50%；Ni：0.85%；Ti≤0.025%；Cr+Pb+V≤0.020%；RE：0.0050%；
Mg：0.045%.
In the present embodiment, in order to reach above-mentioned ingredient requirement, raw material of the present invention be high-purity pig iron and
The mixing of the packing steel scrap of high-quality, high-purity pig iron：Packing steel scrap=70 of high-quality:30；
High-purity pig iron (%)：C：4.35；Si：0.50；Mn：0.062；P：0.021；S：0.012；Ti：0.022；Cr：
0.011；Ni：0.006；Mo：0.002；V：0.010；Pb：0.0006.
The packing steel scrap (%) of high-quality：C：0.021；Si：0.25；Mn：0.13；P:0.011；S：0.014；Ti：0.015；V
≤0.0010。
2.1 by raw material：High-purity pig iron：Packing steel scrap=70 of high-quality:30 add in 15 tons of electric induction furnaces, are fused into liquid
State, temperature reaches 1500 DEG C, after carrying out the outer nitrogen flushing desulfurization of stove, refunds in stove and adjusting component, reaches following requirements：C：
3.88%；Si：0.75%；Mn≤0.10；P≤0.020；S≤0.010.
The good iron liquid of composition adjustment is warming up to 1480 DEG C by 2.2, and going out iron liquid carries out spheroidising, and nodulizer addition is such as
Under：
Heavy rare earth nodulizer：Light rare earth nodulizer=30:70, total addition：1.1%
2.3 carry out following inoculation in spheroidizing process：
2.3.1 inovulant (75SiFe) (composition %：Si：73.51；Al：1.34；Remaining Fe)：0.5% is pressed on nodulizer
Face, carries out an inoculation；
2.3.2 high calcium barium inovulant (composition %：Si：72.99；Ca：1.25；Ba：2.97；Al：1.25；Remaining Fe)：0.5%
Add when iron liquid 2/3rds are gone out, carry out late inoculation process；
2.3.3 sulphur oxygen inovulant (composition %：Si：74；Ca：0.74；Ce：1.68；Al：0.94；S, appropriate O；Remaining Fe；Grain
Degree：0.7-2mm)：0.2% is placed in the special cup of quantitative plug formula, carries out third time inoculation.
2.3.4 the body of roll casting pouring temperature is：1380 DEG C, filling time：The 64-97 seconds.
Bottom gating in this step shown in Fig. 3, sprue 1 and ingate 3 adopt the earthenware of different-diameter,
150mm × 150mm × 32mm ceramic foam filters 4 are placed for 2 times in cross gate amount to 16.In order to quick and stable fills type, adopt
With the special cup of quantitative plug formula and semi-circular cross gate, running gate system section area ratio is FDirectly：FIt is horizontal：FIt is interior=1:0.95:1.
Specially：The earthenwares of sprue Φ 120；Cross gate 80/100 × 120；Ingate：30 earthenwares of Φ 16.In body of roll upper shaft
Place 1 Φ 250mm exothermic riser.
(2) according to the computing formula of the heavy gray iron casting duration of pouring
T-duration of pouring (s) in formula.
GL- type inner metal liquid gross weight (kg)；Iron liquid weight needed for the foundry goods is 10500kg.
S2- wall thickness coefficient, as casting section thickness 40～80mm of ＞, S2 takes 1.9.
While the G. Iron Castings duration of pouring presses the determination of gray iron casting duration of pouring computational methods, then calculate by 1/3～1/2.
Therefore
It is thus determined that the duration of pouring is：The 64-97 seconds.
Embodiment 3
1.1 raw materials prepare：
The overall raw material of the spheroidal graphite roll body of roll is required：C：3.88%；Si：1.80%；Mn≤0.10；P≤
0.020；S≤0.010；Mo：0.40%；Ni：0.80%；Ti≤0.025%；Cr+Pb+V≤0.020%；RE：0.0040%；
Mg：0.040%.
In the present embodiment, in order to reach above-mentioned ingredient requirement, raw material of the present invention be high-purity pig iron and
The mixing of the packing steel scrap of high-quality, high-purity pig iron：Packing steel scrap=75 of high-quality:25；
High-purity pig iron (%)：C：4.35；Si：0.50；Mn：0.062；P：0.021；S：0.012；Ti：0.022；Cr：
0.011；Ni：0.006；Mo：0.002；V：0.010；Pb：0.0006.
The packing steel scrap (%) of high-quality：C：0.021；Si：0.25；Mn：0.13；P:0.011；S：0.014；Ti：0.015；V
≤0.0010。
2.1 by raw material：High-purity pig iron：Packing steel scrap=75 of high-quality:25 add in 15 tons of electric induction furnaces, are fused into liquid
State, temperature reaches 1500 DEG C, after carrying out the outer nitrogen flushing desulfurization of stove, refunds in stove and adjusting component, reaches following requirements：C：
3.88%；Si：0.65%；Mn≤0.10；P≤0.020；S≤0.010.
The good iron liquid of composition adjustment is warming up to 1470 DEG C by 2.2, and going out iron liquid carries out spheroidising, and nodulizer addition is such as
Under：
Heavy rare earth nodulizer：Light rare earth nodulizer=30:70, total addition：1.05%
2.3 carry out following inoculation in spheroidizing process：
2.3.1 inovulant (75SiFe) (composition %：Si：73.51；Al：1.34；Remaining Fe)：0.5% is pressed on nodulizer
Face, carries out an inoculation；
2.3.2 high calcium barium inovulant (composition %：Si：72.99；Ca：1.25；Ba：2.97；Al：1.25；Remaining Fe)：0.5%
Add when iron liquid 2/3rds are gone out, carry out late inoculation process；
2.3.3 sulphur oxygen inovulant (composition %：Si：74；Ca：0.74；Ce：1.68；Al：0.94；S, appropriate O；Remaining Fe；Grain
Degree：0.7-2mm)：0.2% is placed in the special cup of quantitative plug formula, carries out third time inoculation.
2.3.4 the body of roll casting pouring temperature is：1385 DEG C, filling time：The 64-97 seconds.
Bottom gating in this step shown in Fig. 3, sprue 1 and ingate 3 adopt the earthenware of different-diameter,
150mm × 150mm × 32mm ceramic foam filters 4 are placed for 2 times in cross gate amount to 16.In order to quick and stable fills type, adopt
With the special cup of quantitative plug formula and semi-circular cross gate, running gate system section area ratio is FDirectly：FIt is horizontal：FIt is interior=1:0.95:1.
Specially：The earthenwares of sprue Φ 120；Cross gate 80/100 × 120；Ingate：30 earthenwares of Φ 16.In body of roll upper shaft
Place 1 Φ 250mm exothermic riser.
(2) according to the computing formula of the heavy gray iron casting duration of pouring
T-duration of pouring (s) in formula.
GL- type inner metal liquid gross weight (kg)；Iron liquid weight needed for the foundry goods is 10500kg.
S2- wall thickness coefficient, as casting section thickness 40～80mm of ＞, S2 takes 1.9.
While the G. Iron Castings duration of pouring presses the determination of gray iron casting duration of pouring computational methods, then calculate by 1/3～1/2.
Therefore
It is thus determined that the duration of pouring is：The 64-97 seconds.
Performance test
As depicted in figs. 1 and 2, Fig. 1 is the Electronic Speculum of 100 times of foundry goods body Oxygen potential and graphite size and form (before corrosion)
Figure；Fig. 2 is the electron microscope of 100 times of foundry goods body matrix (after corrosion).
The electron microscope checked before corrosion is used for judging the nodular iron casting nodulizing grade；The electron microscope checked after corrosion is used for
Judge the ratio of the situation of the nodular iron casting matrix, ferrite quantity and pearlite fraction, whether there is abnormal conditions such as carbon
Compound, iron phosphide eutectic etc..
As shown in figure 1, foundry goods body Oxygen potential 90%, 6 grades of graphite size, graphite nodule roundness is good, and size and distribution are compared
It is more uniform；As shown in Fig. 2 matrix is 100% ferrite.
Its mechanical property is：Tensile strength Rm：389MPa, yield strength Rp0.2：265MPa, elongation after fracture：22.5%,
Normal temperature ballistic work：18.6J.The ultrasonic examination of cast(ing) surface 100% and magnetic powder inspection, find no shrinkage porosite, shrinkage cavity, slag inclusion and folder
The casting flaws such as sand.Ultrasonic examination longitudinal wave velocity 5895m/s.
It is above-described be only presently preferred embodiments of the present invention, it is all made in the range of the spirit and principles in the present invention appoint
What modification, equivalent and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of spheroidal graphite roll body of roll, it is characterised in that including following weight percent composition：
C：3.85-3.88%；Si：1.80-1.90%；Mn≤0.10%；P≤0.020%；S≤0.010%；Mo：0.35-
0.50%；Ni：0.70-0.85%；Ti≤0.025%；Cr+Pb+V≤0.020%；RE：0.0030-0.0050%；Mg：
0.030-0.045% and balance iron and can not the removal of impurity.
2. the spheroidal graphite roll body of roll according to claim 1, it is characterised in that described body of roll wall thickness is 75-80mm,
External diameter Φ 1654mm, length 1890mm.
3. the spheroidal graphite roll body of roll according to claim 2, it is characterised in that described body of roll two ends are Φ 310mm
Axle, one end length be 340mm, other end length 675mm.
4. a kind of preparation method of the spheroidal graphite roll body of roll, it is characterised in that comprise the steps：
Step 1：Raw material is melted into into iron liquid at a temperature of 1490-1510 DEG C, is adjusted after nitrogen flushing desulfurization in desulphurised hot metal bag
Composition should meet the following requirements C：3.85-3.88%；Si：0.65-0.75%；Mn≤0.10%；P≤0.020%；S≤
0.010%；Ti≤0.025%；Cr+Pb+V≤0.020% and balance iron and can not the removal of impurity；
Step 2：Iron liquid after step 1 desulfurization is warming up to into 1470-1480 DEG C, going out iron liquid carries out spheroidising and inoculation；
Step 3：The iron liquid that step 2 is obtained is cast by running gate system under conditions of 1380-1390 DEG C into resin bonded sand mould
Become the body of roll, filling time：The 64-97 seconds.
5. the preparation method of the spheroidal graphite roll body of roll according to claim 4, it is characterised in that described raw material is matter
Amount is than being 70-80:The high-purity pig iron and packing steel scrap of 20-30；
Wherein, the mass percent of each component of high-purity pig iron is：C：4.35；Si：0.50；Mn：0.062；P：0.021；S：
0.012；Ti：0.022；Cr：0.011；Ni：0.006；Mo：0.002；V：0.010；Pb：0.0006 and surplus iron and can not
The removal of impurity；
The mass percent of each component of packing steel scrap is：C：0.021；Si：0.25；Mn：0.13；P:0.011；S：0.014；
Ti：0.015；The iron of V≤0.0010 and surplus and can not the removal of impurity.
6. the preparation method of the spheroidal graphite roll body of roll according to claim 4, it is characterised in that used in spheroidising
Nodulizer addition it is as follows：
The weight ratio of heavy rare earth nodulizer and light rare earth nodulizer is 30:70, total addition accounts for the 1.0- of raw material gross weight
1.1%.
7. the preparation method of the spheroidal graphite roll body of roll according to claim 4, it is characterised in that described inoculation
Being divided into three steps is carried out：
Inoculation：75SiFe inovulants and nodulizer are added in molten iron simultaneously, an inoculation is carried out；
75SiFe inovulants account for the 0.5% of raw material gross weight；
Late inoculation process：High calcium barium inovulant, high calcium barium inovulant is added to account for raw material gross weight when iron liquid 2/3rds are gone out
0.5%；
Three inoculations：Sulphur oxygen inovulant is placed in cup, sulphur oxygen inovulant accounts for the 0.2% of raw material gross weight.
8. the preparation method of the spheroidal graphite roll body of roll according to claim 4, it is characterised in that described step 3 exists
Carry out in bottom gating, described bottom gating includes sprue, semi-circular cross gate, foam ceramic filter
Device and ingate, iron liquid enters sprue by cup, enters back into semi-circular cross gate, then enters interior by ceramic foam filter
Running channel enters resin-bonded sand cast form；Wherein, sprue, semi-circular cross gate, the ratio of the cross-sectional area of ingate are：FDirectly：FIt is horizontal：FIt is interior
=1:0.95:1.
9. the preparation method of the spheroidal graphite roll body of roll according to claim 8, it is characterised in that described sprue is
Φ 120mm earthenwares；Cross gate is 80/100mm × 120mm；Ingate is Φ 30mm earthenwares 16.
10. the preparation method of the spheroidal graphite roll body of roll according to claim 8, it is characterised in that the described body of roll
Upper shaft places 1 Φ 250mm exothermic riser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710078216.3A CN106636879B (en) | 2017-02-14 | 2017-02-14 | A kind of spheroidal graphite roll body of roll and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710078216.3A CN106636879B (en) | 2017-02-14 | 2017-02-14 | A kind of spheroidal graphite roll body of roll and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106636879A true CN106636879A (en) | 2017-05-10 |
| CN106636879B CN106636879B (en) | 2018-04-20 |
Family
ID=58846055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710078216.3A Active CN106636879B (en) | 2017-02-14 | 2017-02-14 | A kind of spheroidal graphite roll body of roll and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106636879B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354370A (en) * | 2017-07-19 | 2017-11-17 | 广东中天创展球铁有限公司 | A kind of casting ferrite with nodular cast iron and preparation method thereof |
| CN108929979A (en) * | 2018-08-15 | 2018-12-04 | 广东中天创展球铁有限公司 | A kind of spheroidal graphite cast-iron oil cylinder seat and its production technology |
| CN111926239A (en) * | 2020-10-16 | 2020-11-13 | 常州凯达重工科技有限公司 | High-strength high-hardness troostite ductile iron section steel roll and manufacturing method thereof |
| CN112108613A (en) * | 2019-06-20 | 2020-12-22 | 常州凯达重工科技有限公司 | Design method of roller static pouring device |
| CN112139454A (en) * | 2020-09-30 | 2020-12-29 | 大连金河铸造有限公司 | Improved slag stopping structure and method for pouring system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980059367A (en) * | 1996-12-31 | 1998-10-07 | 추호석 | Manufacturing method of forklift knuckle |
| JP2000234124A (en) * | 1999-02-10 | 2000-08-29 | Kubota Tekkosho:Kk | Austemper treatment of spheroidal graphite cast iron |
| JP2005290533A (en) * | 2004-04-06 | 2005-10-20 | Kubota Corp | High wear resistant roll material and high wear resistant composite roll |
| CN201271737Y (en) * | 2008-10-17 | 2009-07-15 | 浙江佳力风能技术有限公司 | Large casting pouring system with filter |
| CN101585078A (en) * | 2008-05-23 | 2009-11-25 | 上海华新合金有限公司 | Method for casting as-cast high-tenacity cast iron bearing cover of locomotive |
| CN103436772A (en) * | 2013-09-05 | 2013-12-11 | 常州华德机械有限公司 | Low-temperature tough ferrite nodular cast iron of 60 DEG C below zero and preparation method thereof |
| CN106077493A (en) * | 2016-08-25 | 2016-11-09 | 四川南车共享铸造有限公司 | A kind of running gate system for casting diesel-engine body foundry goods |
-
2017
- 2017-02-14 CN CN201710078216.3A patent/CN106636879B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980059367A (en) * | 1996-12-31 | 1998-10-07 | 추호석 | Manufacturing method of forklift knuckle |
| JP2000234124A (en) * | 1999-02-10 | 2000-08-29 | Kubota Tekkosho:Kk | Austemper treatment of spheroidal graphite cast iron |
| JP2005290533A (en) * | 2004-04-06 | 2005-10-20 | Kubota Corp | High wear resistant roll material and high wear resistant composite roll |
| CN101585078A (en) * | 2008-05-23 | 2009-11-25 | 上海华新合金有限公司 | Method for casting as-cast high-tenacity cast iron bearing cover of locomotive |
| CN201271737Y (en) * | 2008-10-17 | 2009-07-15 | 浙江佳力风能技术有限公司 | Large casting pouring system with filter |
| CN103436772A (en) * | 2013-09-05 | 2013-12-11 | 常州华德机械有限公司 | Low-temperature tough ferrite nodular cast iron of 60 DEG C below zero and preparation method thereof |
| CN106077493A (en) * | 2016-08-25 | 2016-11-09 | 四川南车共享铸造有限公司 | A kind of running gate system for casting diesel-engine body foundry goods |
Non-Patent Citations (1)
| Title |
|---|
| 林家骝: "《造型制芯及工艺基础》", 30 June 2010, 化学工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354370A (en) * | 2017-07-19 | 2017-11-17 | 广东中天创展球铁有限公司 | A kind of casting ferrite with nodular cast iron and preparation method thereof |
| CN108929979A (en) * | 2018-08-15 | 2018-12-04 | 广东中天创展球铁有限公司 | A kind of spheroidal graphite cast-iron oil cylinder seat and its production technology |
| CN112108613A (en) * | 2019-06-20 | 2020-12-22 | 常州凯达重工科技有限公司 | Design method of roller static pouring device |
| CN112139454A (en) * | 2020-09-30 | 2020-12-29 | 大连金河铸造有限公司 | Improved slag stopping structure and method for pouring system |
| CN111926239A (en) * | 2020-10-16 | 2020-11-13 | 常州凯达重工科技有限公司 | High-strength high-hardness troostite ductile iron section steel roll and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106636879B (en) | 2018-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106636879B (en) | A kind of spheroidal graphite roll body of roll and preparation method thereof | |
| CN105385802B (en) | The casting technique of Low-temperature high-tenacity nodular cast iron butterfly type valve | |
| US3702243A (en) | Method of preparing deoxidized steel | |
| CN102703809B (en) | Hot-rolled steel and manufacturing method thereof | |
| WO2019120122A1 (en) | HIGH STRENGTH AND HIGH TOUGHNESS SPHEROIDIZING GRAPHITE CAST IRON AT LOW TEMPERATURE OF -40ºC AND PREPARATION METHOD THEREOF AND RAILWAY LOCOMOTIVE PARTS | |
| CN108642366A (en) | A kind of alterant and its melting method for thin-wall high intensity gray cast iron | |
| CN111961954A (en) | Preparation method of as-cast mixed matrix QT500-14 nodular cast iron | |
| CN105970075B (en) | A kind of process for preparing vermicular graphite iron material | |
| Bhardwaj | Steel and Iron Handbook | |
| CN104178684A (en) | Smelting method of chromium-molybdenum-copper-nickel-tin-antimony low-alloy wear-resistant cast iron | |
| CN109321813A (en) | A kind of high-intensity and high-tenacity vermicular cast iron diverter front cover cast casting technique | |
| CN106222528B (en) | A kind of method of the Micro shrinkage of control spherulitic iron piece with big cross section | |
| CN111001792B (en) | High-nickel high-chromium steel roller and preparation method thereof | |
| Borse et al. | Review on grey cast iron inoculation | |
| CN112589054A (en) | Sand-lined casting method for gray cast iron automobile engine main bearing cap iron mold | |
| CN105568124A (en) | QT500-7 nodular cast iron material added with tin, and processing method thereof, and cast | |
| CN104561409B (en) | A kind of production method of hypoeutectic foundry iron | |
| Haque | Investigation on properties and microstructures of spheroidal graphite Fe–C–2Si and Fe–C–2Al cast irons | |
| CN113897532B (en) | Method for preparing Q235B casting blank from high-sulfur low-manganese vanadium-titanium molten iron | |
| CN105112773B (en) | Vanadium-titanium alloy antifriction cast iron rope pulley for high-speed elevator and preparation process of rope pulley | |
| CN104178683A (en) | Efficient REMgVCaSiFe alloy vermiculizer and production process thereof | |
| CN114700461A (en) | Casting method of thin-wall nodular iron casting capable of eliminating free cementite | |
| CN109402494B (en) | Alloy cast iron brake shoe for rolling stock and manufacturing method thereof | |
| CN112126845A (en) | QT500-14 solid solution strengthening ferrite ductile iron for automobile steering gear shell and production method thereof | |
| CN107245642B (en) | A kind of equalizing suspension system casting with spheroidal graphite cast-iron plastics on new materials with and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |