CN114752739A - Machine tool iron casting material and production process thereof - Google Patents
Machine tool iron casting material and production process thereof Download PDFInfo
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- CN114752739A CN114752739A CN202210441032.XA CN202210441032A CN114752739A CN 114752739 A CN114752739 A CN 114752739A CN 202210441032 A CN202210441032 A CN 202210441032A CN 114752739 A CN114752739 A CN 114752739A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 55
- 238000005266 casting Methods 0.000 title claims abstract description 45
- 239000000463 material Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 31
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 26
- 239000012535 impurity Substances 0.000 claims abstract description 17
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 14
- 238000003723 Smelting Methods 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 239000002054 inoculum Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 6
- OOJQNBIDYDPHHE-UHFFFAOYSA-N barium silicon Chemical compound [Si].[Ba] OOJQNBIDYDPHHE-UHFFFAOYSA-N 0.000 claims description 5
- 238000011081 inoculation Methods 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 235000000396 iron Nutrition 0.000 claims 1
- 239000011573 trace mineral Substances 0.000 abstract description 10
- 235000013619 trace mineral Nutrition 0.000 abstract description 10
- 238000007711 solidification Methods 0.000 abstract description 9
- 230000008023 solidification Effects 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000011572 manganese Substances 0.000 description 15
- 229910000859 α-Fe Inorganic materials 0.000 description 11
- 229910001567 cementite Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910001141 Ductile iron Inorganic materials 0.000 description 6
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 6
- 229910001562 pearlite Inorganic materials 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
-
- 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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a machine tool iron casting material and a production process thereof, and relates to the technical field of iron castings. The invention comprises 60-70 parts of foundry returns, 20-40 parts of scrap steel and 10-30 parts of pig iron by mass; the quality components of the iron casting material comprise: c: 2.6-3.2%, Si: 3.8 to 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.03 to 0.05 percent, and the balance is Fe. The invention adopts high-purity pig iron, scrap steel and scrap returns as raw materials, so that the total content of trace elements in the furnace charges can be conveniently controlled, various interferences during solidification are avoided by reducing the total content of the trace elements, the content of Ti is greatly reduced by reducing the content of Mn, and the nodulizing agent is added, so that the nodulizing rate of the invention reaches more than two levels, namely more than 90%.
Description
Technical Field
The invention belongs to the technical field of iron castings, and particularly relates to a machine tool iron casting material and a production process thereof.
Background
The nodular cast iron is treated by spheroidization and inoculation, and the graphite form of the nodular cast iron is spheroidal, so that the mechanical property of the nodular cast iron is effectively improved, particularly, the plasticity and the toughness are improved, the strength higher than that of carbon steel is obtained, and the nodular cast iron comprises the following components in different forms: firstly, ferrite has a body-centered cubic lattice, and is an interstitial solid solution with carbon dissolved in alpha-Fe, which is called ferrite, namely alpha-Fe and a solid solution based on the alpha-Fe, and is represented by a symbol F; pearlite is a eutectoid body of ferrite and cementite formed by eutectoid transformation of austenite. The form is a layered complex phase object with alternately overlapped ferrite thin layers and cementite thin layers, which is also called as sheet pearlite. The carbon content is ω c ═ 0.77%, as indicated by the symbol P. The mechanical property of the pearlite is between ferrite and cementite and is determined by pearlite interlayer spacing, namely the average value of the thickness sum of a layer of ferrite and a layer of cementite; and thirdly, a cementite, a metal compound formed by iron and carbon, the chemical formula of which is Fe3C, the carbon content of the cementite is omega c which is 6.69%, and the melting point is 1227 ℃. The crystal lattice is a complex orthogonal crystal lattice, the hardness is very high HBW (high hardness) 800, the plasticity and the toughness are almost zero, and the brittleness is very high.
CN104419862A discloses ferritic nodular cast iron and a production method thereof, belonging to the technical field of metal smelting. The cast iron has the characteristics that: the tensile strength is 600MPa-700MPa, the elongation is 15% -20%, and the hardness is 150HB-210 HB. The production method comprises the steps of proportioning, smelting, inoculation, solid solution strengthening and the like. Although the high-strength ferritic nodular cast iron disclosed in CN 103866176A has the following components in percentage by weight (wt%): carbon: 3.64-3.78; silicon: 2.61-2.68; manganese: less than 0.25; sulfur: less than 0.018; phosphorus: less than 0.04; magnesium: 0.03-0.05; rare earth: 0.03-0.05%; other unavoidable impurities: less than 0.1; the balance being iron; the invention has overhigh cost and increases the cost of products under the condition of the same performance, so the casting material preparation process which has low cost, reliable performance and simple process is needed
Disclosure of Invention
The invention aims to provide a machine tool iron casting material and a production process thereof, which have the advantages of simple process and simple and convenient operation, can utilize returned materials to the maximum extent and reduce the manufacturing cost of the iron casting.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a machine tool iron casting material comprises 60-70 parts by mass of scrap returns, 20-40 parts by mass of scrap steel and 10-30 parts by mass of pig iron;
the quality components of the iron casting material comprise: c: 2.6-3.2%, Si: 3.8 to 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.03 to 0.05 percent, and the balance is Fe.
Optionally, 60 parts by mass of scrap returns, 40 parts by mass of scrap steel and 10 parts by mass of pig iron;
the quality components of the iron casting material comprise: c: 2.6%, Si: 3.8 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.03 percent, and the balance is Fe.
Optionally, 70 parts by mass of scrap returns, 20 parts by mass of scrap steel and 30 parts by mass of pig iron;
the quality components of the iron casting material comprise: c: 3.2%, Si: 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.05 percent, and the balance is Fe.
Optionally, 65 parts by mass of scrap returns, 30 parts by mass of scrap steel and 30 parts by mass of pig iron;
the quality components of the iron casting material comprise: c: 2.8%, Si: 4 percent, Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.04 percent, and the balance is Fe.
Optionally, 60 parts by mass of scrap returns, 20 parts by mass of scrap steel and 30 parts by mass of pig iron;
the quality components of the iron casting material comprise: c: 3.2%, Si: 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.05 percent, and the balance is Fe.
A machine tool iron casting production process comprises the following steps:
step 1, selecting and matching furnace burden: sequentially adding pig iron, foundry returns and scrap steel into a smelting furnace;
step 2, smelting: smelting by adopting a medium-frequency induction furnace to obtain base iron, wherein the tapping temperature is 1540 and 1550 ℃;
step 3, selecting ZFCR-6 as a nodulizer, selecting 75Si-Fe and Si-Be as bottom silicon inoculants, and nodulizing and inoculating at the tapping temperature to obtain nodulized molten iron;
step 4, casting stream inoculation: barium silicon is selected as an inoculant;
step 5, detection and reinforcement: taking out molten iron by using a molten steel sampler, and detecting that the spheroidization rate is more than two levels by using an online ultrasonic detector;
and 6, opening the box after strengthening for 0.5-2 hours.
Optionally, high-purity pig iron, low-Mn low-P low-S scrap steel and foundry returns are used as furnace materials in the step 1.
Optionally, in step 3, the addition amount of ZFCR-6 is 0.9-1.1%, the addition amount of 75Si-Fe is 0.6-0.8%, and the addition amount of Si-Be is 0.2-0.4%.
Optionally, the addition amount of barium and silicon in step 4 is 0.07-0.09%.
Optionally, the nodulizing agent and the bottom silicon inoculant in the step 3 are arranged in a high-purity pig iron box.
The embodiment of the invention has the following beneficial effects:
according to one embodiment of the invention, high-purity pig iron, scrap steel and foundry returns are used as raw materials, so that the total content of trace elements in the furnace charges is convenient to control, various interferences during solidification are avoided through the reduction of the total content of the trace elements, the content of Ti is greatly reduced through the reduction of the content of Mn, the nodulizing rate reaches more than two levels (more than 90%), pearlite is reduced through the full solidification of Si, the content of ferrite reaches about 93%, the strength reaches 580MPa-655MPa due to the solidification of the added silicon, the elongation reaches 21% -26%, the surface hardness reaches 180-220HB, the high elongation and the low surface hardness are ensured, and the casting is uniform in hardness distribution and convenient to process.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a process flow diagram of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
Referring to fig. 1, in the present embodiment, a machine tool iron casting material and a production process thereof are provided, including: 60-70 parts of foundry returns, 20-40 parts of scrap steel and 10-30 parts of pig iron by mass;
the quality components of the iron casting material comprise: c: 2.6-3.2%, Si: 3.8 to 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.03 to 0.05 percent, and the balance is Fe.
The method is characterized in that high-purity pig iron, scrap steel and foundry returns are used as raw materials, the total content of trace elements in the furnace charges is convenient to control, various interferences during solidification are avoided through the reduction of the total content of the trace elements, the content of Mn is greatly reduced, the content of Ti is greatly reduced, and a nodulizer is added, so that the nodulizing rate reaches more than two levels (more than 90%), the generation of pearlite is reduced through the full solidification of Si, the content of ferrite reaches about 93%, the strength reaches 580MPa-655MPa due to the solidification of the added silicon, the elongation reaches 21% -26%, the surface hardness reaches 180-class 220HB, the high elongation and the low surface hardness are ensured, the hardness of castings is uniformly distributed, and the processing is convenient.
The method comprises the following steps of (1) specifically, by mass, 60 parts of a returned material, 40 parts of scrap steel and 10 parts of pig iron;
the quality components of the iron casting material comprise: c: 2.6%, Si: 3.8 percent, less than or equal to 0.17 percent of Mn, less than or equal to 0.026 percent of P, less than or equal to 0.013 percent of S, less than or equal to 0.026 percent of Ti, less than or equal to 0.03 percent of total content of other impurities and the balance of Fe, and 40 parts of scrap steel is arranged, so that the content of the scrap steel in the material is increased, and the hardness of the iron casting is improved conveniently.
The method comprises the following steps of (1) specifically, by mass, 70 parts of a returned material, 20 parts of scrap steel and 30 parts of pig iron;
the quality components of the iron casting material comprise: c: 3.2%, Si: 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.05 percent, and the balance is Fe, and by arranging 70 parts of recycled materials, the utilization amount of the recycled materials is increased conveniently, and the production cost is reduced conveniently.
The steel scrap comprises, by mass, 65 parts of a scrap returns, 30 parts of scrap steel and 30 parts of pig iron;
the quality components of the iron casting material comprise: c: 2.8%, Si: 4 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.04 percent, and the balance of Fe, the proportion of pig iron is increased by arranging 30 parts of pig iron, the total content of trace elements in furnace burden is convenient to control, and various interferences during solidification are avoided by reducing the total content of the trace elements.
The method comprises the following steps of (1) specifically, by mass, 60 parts of a returned material, 20 parts of scrap steel and 30 parts of pig iron;
the quality components of the iron casting material comprise: c: 3.2%, Si: 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.05 percent, and the balance of Fe, 20 parts of scrap steel and 30 parts of pig iron are arranged, the proportion of the pig iron is further increased, the total content of trace elements in furnace burden is convenient to control more easily, and then various interferences during solidification are avoided through the reduction of the total content of the trace elements.
A machine tool iron casting production process comprises the following steps:
step 1, furnace burden matching: high-purity pig iron, low-Mn low-P low-S scrap steel and scrap steel are taken as furnace materials, and the pig iron, the scrap steel and the scrap steel are sequentially added into a smelting furnace;
step 2, smelting: smelting by adopting a medium-frequency induction furnace to obtain base iron, wherein the tapping temperature is 1540 and 1550 ℃;
step 3, arranging a nodulizer and a bottom silicon inoculant in a high-purity pig iron box, selecting ZFCR-6 as the nodulizer, selecting 75Si-Fe and Si-Be as the bottom silicon inoculant, and nodulizing and inoculating at the tapping temperature to obtain nodulized molten iron, wherein the addition amount of the ZFCR-6 is 0.9-1.1%, the addition amount of the 75Si-Fe is 0.6-0.8%, and the addition amount of the Si-Be is 0.2-0.4%;
step 4, casting stream inoculation: barium silicon is selected as an inoculant, and the addition amount of the barium silicon is 0.07-0.09%;
step 5, detection and reinforcement: taking out molten iron by adopting a molten steel sampler, and detecting that the nodularity is more than two levels by using an online ultrasonic detector;
and 6, opening the box after strengthening for 0.5-2 hours.
The above embodiments may be combined with each other.
The present invention is not limited to the above-described embodiments, and any structural changes made in the light of the present invention shall fall within the scope of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (10)
1. A machine tool iron casting material, comprising: 60-70 parts of foundry returns, 20-40 parts of scrap steel and 10-30 parts of pig iron by mass;
the quality components of the iron casting material comprise: c: 2.6-3.2%, Si: 3.8 to 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.03 to 0.05 percent, and the balance is Fe.
2. The machine tool iron casting material and the production process thereof as claimed in claim 1, wherein 60 parts by mass of scrap iron, 40 parts by mass of scrap steel, 10 parts by mass of pig iron;
the quality components of the iron casting material comprise: c: 2.6%, Si: 3.8 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.03 percent, and the balance is Fe.
3. The machine tool iron casting material according to claim 1, wherein 70 parts by mass of scrap returns, 20 parts by mass of scrap steel, 30 parts by mass of pig iron;
the quality components of the iron casting material comprise: c: 3.2%, Si: 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.05 percent, and the balance is Fe.
4. The machine tool iron casting material of claim 1, wherein 65 parts by mass of scrap iron, 30 parts by mass of scrap steel, 30 parts by mass of pig iron;
the quality components of the iron casting material comprise: c: 2.8%, Si: 4 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.04 percent, and the balance is Fe.
5. The machine tool iron casting material of claim 1, wherein 60 parts by mass of scrap returns, 20 parts by mass of scrap steels, 30 parts by mass of pig irons;
the quality components of the iron casting material comprise: c: 3.2%, Si: 4.2 percent of Mn is less than or equal to 0.17 percent, P is less than or equal to 0.026 percent, S is less than or equal to 0.013 percent, Ti is less than or equal to 0.026 percent, the total content of other impurities is less than or equal to 0.05 percent, and the balance is Fe.
6. A machine tool iron casting production process is characterized by comprising the following steps:
step 1, selecting and matching furnace burden: sequentially adding pig iron, foundry returns and scrap steel into a smelting furnace;
step 2, smelting: smelting by adopting an intermediate frequency induction furnace to obtain base iron, wherein the tapping temperature is 1540-1550 ℃;
step 3, selecting ZFCR-6 as a nodulizer, selecting 75Si-Fe and Si-Be as bottom silicon inoculants, and nodulizing and inoculating at the tapping temperature to obtain nodulized molten iron;
step 4, casting stream inoculation: barium silicon is selected as an inoculant;
step 5, detection and reinforcement: taking out molten iron by using a molten steel sampler, and detecting that the spheroidization rate is more than two levels by using an online ultrasonic detector;
and 6, opening the box after strengthening for 0.5-2 hours.
7. The process for producing iron castings for machine tools according to claim 6, wherein high purity pig iron, low Mn, low P, low S scrap and scrap returns are used as the charge stock in step 1.
8. A process for the production of iron castings for machine tools as claimed in claim 6, wherein in step 3 ZFCR-6 is added in an amount of 0.9-1.1%, 75Si-Fe is added in an amount of 0.6-0.8%, and Si-Be is added in an amount of 0.2-0.4%.
9. A process for the production of iron castings for machine tools according to claim 6, wherein the amount of barium silicon added in step 4 is 0.07-0.09%.
10. The process for producing iron castings for machine tools according to claim 6, wherein in step 3 nodulizing agent and bottom silicon inoculant are provided in a high purity pig iron box.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160024623A1 (en) * | 2014-07-28 | 2016-01-28 | Pei Yu | High strength nodular cast iron pole and preparation technology thereof |
| CN105369119A (en) * | 2015-11-02 | 2016-03-02 | 河南省西峡汽车水泵股份有限公司 | Iron casting material and production technology thereof |
| CN111893372A (en) * | 2020-08-10 | 2020-11-06 | 安徽恒升铸业有限公司 | As-cast production process of low-temperature impact toughness nodular cast iron |
| CN112593140A (en) * | 2020-12-21 | 2021-04-02 | 福建丰力机械科技有限公司 | Preparation method of wear-resistant nodular cast iron |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160024623A1 (en) * | 2014-07-28 | 2016-01-28 | Pei Yu | High strength nodular cast iron pole and preparation technology thereof |
| CN105369119A (en) * | 2015-11-02 | 2016-03-02 | 河南省西峡汽车水泵股份有限公司 | Iron casting material and production technology thereof |
| CN111893372A (en) * | 2020-08-10 | 2020-11-06 | 安徽恒升铸业有限公司 | As-cast production process of low-temperature impact toughness nodular cast iron |
| CN112593140A (en) * | 2020-12-21 | 2021-04-02 | 福建丰力机械科技有限公司 | Preparation method of wear-resistant nodular cast iron |
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