CN1851032A - High manganese steel base hard alloy, and its preparing method - Google Patents
High manganese steel base hard alloy, and its preparing method Download PDFInfo
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- CN1851032A CN1851032A CN 200610031772 CN200610031772A CN1851032A CN 1851032 A CN1851032 A CN 1851032A CN 200610031772 CN200610031772 CN 200610031772 CN 200610031772 A CN200610031772 A CN 200610031772A CN 1851032 A CN1851032 A CN 1851032A
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Abstract
The invention provides high manganese steel base hard alloy with the high rigidity and the high impacting tenacity, the base group is highly austenitic manganese steel, the carbonize titanium is the hard phase, the compose includes the (30.5-32.5) wt% titanium, the (9.0-10.0) wt% nickel, the (1.0-2.0) wt% molybdenum, the (7.8-8.10) wt% carbon and the remaining quantity of the iron; the producing process includes the carbonizing titanium powder, the iron steel, the manganese iron powder, the nickel powder, the molybdenum powder and the carbon powder are mixed to the material powder by the certain weight percent, the content of the carbon is (7.80-8.10) wt%, the content of the manganese is (9.0-10.0) wt%, the content of the nickel is (2.40-2.80) wt%, the content of the molybdenum is (1.0-2.0) wt%, the sinter temperature keeps 1350-1650 degree, the vacuum limit is under 10pa, the heat preservation time is counted as the 1.5 minutes each mm by the max effective size of the pressed embryo; the invention can be applied to the digging the terrane of the complex geologic frame, the jointing ability is good, the crack percent during the electric welding sealing is under 0.5%, the using life is longer.
Description
Technical field
The present invention relates to a kind of high manganese steel base hard alloy and preparation method thereof.
Background technology
When the engineering excavation industry is made the gear wheel brill,, adapt to the excavation of rock stratum by welding high-wearing feature, high rigidity material, and the work-ing life of elongated component.The above line owner will use high mangaenese steel, rich chromium cast iron, WC-Co series hard alloy material and traditional high manganese steel base hard alloy at present.High mangaenese steel, rich chromium cast iron have impelling strength preferably, but its hardness is on the low side, and wear resistance is relatively poor, and tunnelling footage is shallow, promptly use the life-span short; The WC-Co series hard alloy has very high hardness, (3～5) J/mm but its toughness is only had an appointment
2, the gear wheel of its making bores the excavation that can't be used for complicated geological structure rock stratum, such as the extremely uneven sand of hardness, stone mixing rock stratum etc.; The tradition high manganese steel base hard alloy is used widely because of good toughness, shock resistance, but because its matrix height austenitizing not, the welding crack rate is about 30%, has influenced use properties.
Summary of the invention
The present invention is directed to the deficiency of above-mentioned existing material, provide a kind of matrix for height austenitizing high mangaenese steel, hard mutually for titanium carbide, have the high manganese steel base hard alloy of high rigidity and high impact toughness, be applicable to the excavation of the rock stratum of complicated geological structure, welding property is good, electric welding welding crack rate≤0.5%.
High manganese steel base hard alloy of the present invention consists of: the molybdenum of the manganese of the titanium of (30.5～32.5) wt%, (9.0～10.0) wt%, the nickel of (2.40～2.80) wt%, (1.0～2.0) wt%, the carbon of (7.8～8.10) wt%, surplus is an iron.
The preparation method of high manganese steel base hard alloy of the present invention, comprise carbonized titanium powder, iron powder, ferromanganese powder, nickel powder, molybdenum powder, carbon dust by certainweight per-cent preparation raw material powder, through wet-milling, drying, mix glue, suppress, come unstuck, sintering, quenching, make high manganese steel base hard alloy, it is characterized in that: control compound total carbon content is (7.80～8.10) wt% during batching, manganese content is (9.0～10.0) wt%, nickel content is (2.40～2.80) wt%, and molybdenum content is (1.0～2.0) wt%; The control sintering temperature is at 1350 ℃～1365 ℃ during sintering, and vacuum tightness be≤10Pa, soaking time by pressed compact maximum effective dimensions be calculated as every millimeter 1.5～1.6 minutes.
The present invention is by control compound total carbon content, manganese content, nickel content and molybdenum content, the high manganese steel base hard alloy of preparing, its matrix height austenitizing, significantly reduce stress concentration, avoid the crackle tendency, its welding property is greatly improved, the welding crack rate is lower than 0.5%; Hardness reaches 〉=HRC56, and bending strength reaches 〉=1800MPa, and impelling strength reaches 6～10J/mm
2, density reaches (6.3～6.5) g/cm
3, porosity reaches≤(A06, B06).With WC-Co series hard alloy ratio, be suitable for impacting field work big, that stratal configuration is complicated, and have the advantage that electric welding crackle rate is low, can cast, excavate the wear resistance that gear wheel is bored, the high request of shock resistance thereby satisfied the rock stratum, simultaneously long service life.When underground pressure 60MPa was following, gear wheel bored tunnelling footage and reaches more than the 120m, and during underground pressure 60MPa～100MPa, gear wheel bores tunnelling footage and reaches more than the 80m, reached high mangaenese steel, rich chromium cast iron gear wheel and bored three times of tunnelling footage.High austenite high manganese steel base hard alloy of the present invention also can be used for broken building stones etc., with existing high mangaenese steel, rich chromium cast iron ratio, when slightly broken work-ing life suitable, smartly improve 3～6 times work-ing life when broken.
Specific embodiment
Embodiment 1, preparation 100Kg other raw materials except that carbon dust, wherein (carbon content is 19.30wt% to carbonized titanium powder 40kg, and oxygen level is 0.28wt%, and surplus is a titanium; Impurity level very I is ignored, down with), nickel powder 2.8kg, molybdenum powder 1.2kg, (carbon content is 1.42wt% to ferromanganese powder 12.5kg, and manganese content is 78.7wt%, and surplus is an iron; Impurity level very I is ignored, down with), iron powder 43.5kg, add carbon dust 0.06kg as calculated again; The wet-milling in ball mill of above-mentioned all raw materials is mixed, ratio of grinding media to material is 3: 1, after sieving, drying makes the compound powder, total carbon content is 7.97wt% in the compound, titanium content is 31.22wt%, and manganese content is 9.47wt%, and nickel content is 2.66wt%, molybdenum content is 1.12wt%, and iron is 45.87wt%; Mix glue then, suppress, come unstuck, sintering and quench treatment, wherein the agglomerating pressed compact is of a size of: length * wide * height=58mm * 8mm * 28mm (following examples together), the control sintering temperature is at 1350 ℃～1365 ℃, vacuum tightness is≤10Pa, soaking time was calculated as 1 hour 27 minutes in 1.5 minutes by every millimeter of the maximum effective dimensions of pressed compact, obtain high manganese steel base hard alloy, its hardness is HRC62.1, and density is 6.37g/cm
3, impelling strength is 7.2J/mm
2, bending strength is 2000MPa, porosity is A02, B00.Welding high manganese steel base hard alloy of the present invention on vertical shaft hobboing cutter gear wheel bores (following examples are together), the welding crack rate is 0, what prove gained is the high austenite high manganese steel base hard alloy.
Embodiment 2, preparation 100Kg other raw materials except that carbon dust, wherein (carbon content is 19.31wt% to carbonized titanium powder 40Kg, oxygen level is 0.32wt%, surplus is a titanium), nickel powder 2.8kg, molybdenum powder 1.2kg, (manganese content is 80.20wt% to ferromanganese powder 12kg, carbon content is 1.62wt%, surplus is an iron), iron powder 44kg, add carbon dust 0.08kg as calculated again; The wet-milling in ball mill of above-mentioned all raw materials is mixed, ratio of grinding media to material is 3: 1, after sieving, drying makes the compound powder, total carbon content is 8.00wt% in the compound, titanium content is 31.47wt%, manganese content is 9.63wt%, and nickel content is 2.66wt%, and molybdenum content is 1.08wt%, iron is 45.57wt%, mix glue then, compacting, come unstuck, sintering and quench treatment, the control sintering temperature is at 1350 ℃～1365 ℃, and vacuum tightness is≤10Pa, soaking time was calculated as 1 hour 30 minutes in 1.55 minutes by every millimeter of the maximum effective dimensions of pressed compact, obtain the high austenite high manganese steel base hard alloy, its hardness is HRC61.3, and density is 6.38g/cm
3, impelling strength is 8.4J/mm
2, bending strength is 2050MPa, porosity is A04, B00.Gear wheel bores welding crack rate 0.1%.
Embodiment 3, preparation 100Kg other raw materials except that carbon dust, wherein carbonized titanium powder 40Kg carbon content is that 19.24wt%, oxygen level are 0.28wt%, surplus is a titanium), nickel powder 2.8kg, molybdenum powder 1.2kg, (manganese content is 80.20wt% to ferromanganese powder 12.3kg, carbon content is 1.62wt%, surplus is an iron), iron powder 43.7kg, add carbon dust 0.1kg as calculated again; The wet-milling in ball mill of above-mentioned all raw materials is mixed, ratio of grinding media to material is 3: 1, after sieving, drying makes the compound powder, it is 7.91wt% that compound is surveyed total carbon content, titanium content is 31.66wt%, manganese content is 9.81wt%, and nickel content is 2.60wt%, and molybdenum content is 1.18wt%, iron is 46.11wt%, mix glue then, compacting, come unstuck, sintering and quench treatment, the control sintering temperature is at 1350 ℃～1365 ℃, and vacuum tightness is≤10Pa, every millimeter of the maximum effective dimensions of soaking time pressed compact was calculated as 1 hour 33 minutes in 1.6 minutes, obtain the high austenite high manganese steel base hard alloy, its hardness is HRC60.7, and density is 6.36g/cm
3, impelling strength is 10.4J/mm
2, bending strength is 2050MPa, porosity is A02, B00.It is 0 that gear wheel bores the welding crack rate.
Embodiment 4, preparation 100Kg other raw materials except that carbon dust, wherein (carbon content is 19.42wt% to carbonized titanium powder 40Kg, oxygen level is 0.43wt%, surplus is a titanium), nickel powder 2.8kg, molybdenum powder 1.2kg, (manganese content is 78.7wt% to ferromanganese powder 12kg, carbon content is 1.42wt%, surplus is an iron), iron powder 44kg, 0.06kg carbon dust more as calculated; The wet-milling in ball mill of above-mentioned all raw materials is mixed, ratio of grinding media to material is controlled to be 3: 1, after sieving, drying makes the compound powder, it is 7.95wt% that compound is surveyed total carbon content, titanium content is 31.77wt%, manganese content is 9.37wt%, and nickel content is 2.72wt%, and molybdenum content is 1.18wt%, iron is 46.41wt%, mix glue then, compacting, come unstuck, sintering and quench treatment, the control sintering temperature is at 1350 ℃～1365 ℃, and vacuum tightness is≤10Pa, soaking time was calculated as 1 hour 27 minutes in 1.5 minutes by every millimeter of the maximum effective dimensions of pressed compact, obtain the high austenite high manganese steel base hard alloy, its hardness is HRC62.1, and density is 6.34g/cm
3, impelling strength is 7.5J/mm
2, bending strength is 1810MPa, porosity is A04, B00.It is 0.08% that gear wheel bores the welding crack rate.
Embodiment 5, preparation 100Kg other raw materials except that carbon dust, wherein (carbon content is 19.19wt% to carbonized titanium powder 40Kg, oxygen level is 0.27wt%, surplus is a titanium), nickel powder 2.8kg, molybdenum powder 1.2kg, (manganese content is 80.2wt% to ferromanganese powder 12.5kg, carbon content is 1.62wt%, surplus is an iron), iron powder 43.5kg, add carbon dust 0.15kg as calculated again; The wet-milling in ball mill of above-mentioned all raw materials is mixed, ratio of grinding media to material is controlled to be 3: 1, after sieving, drying makes the compound powder, total carbon content is 8.01wt% in the compound, titanium content is 31.38wt%, manganese content is 9.98wt%, and nickel content is 2.36wt%, and molybdenum content is 1.14wt%, iron is 46.11wt%, mix glue then, compacting, come unstuck, sintering and quench treatment, the control sintering temperature is at 1350 ℃～1365 ℃, and vacuum tightness is≤10Pa, soaking time was calculated as 1 hour 33 minutes in 1.6 minutes by every millimeter of the maximum effective dimensions of pressed compact, obtain the high austenite high manganese steel base hard alloy, its hardness is HRC60.1, and density is 6.37g/cm
3, impelling strength is 9.6J/mm
2, bending strength is 1910MPa, porosity is A02, B00.It is 0 that gear wheel bores the welding crack rate.
Claims (2)
1, a kind of high manganese steel base hard alloy consists of the titanium of (30.5～32.5) wt%, the manganese of (9.0～10.0) wt%, the nickel of (2.40～2.80) wt%, the molybdenum of (1.0～2.0) wt%, the carbon of (7.8～8.10) wt%, and surplus is an iron.
2, the preparation method of high manganese steel base hard alloy as claimed in claim 1, comprise carbonized titanium powder, iron powder, ferromanganese powder, nickel powder, molybdenum powder, carbon dust by certainweight per-cent preparation raw material powder, through wet-milling, drying, mix glue, suppress, come unstuck, sintering, quenching, make high manganese steel base hard alloy, it is characterized in that: control compound total carbon content is (7.80～8.10) wt% during batching, titanium content is (30.5～32.5) wt%, manganese content is (9.0～10.0) wt%, nickel content is (2.40～2.80) wt%, and molybdenum content is (1.0～2.0) wt%; The control sintering temperature is at 1350 ℃～1365 ℃ during sintering, and vacuum tightness be≤10Pa, and soaking time is calculated as every millimeter (1.5～1.6) minute by pressed compact maximum effective dimensions.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195407A (en) * | 2014-09-23 | 2014-12-10 | 江苏汇诚机械制造有限公司 | Preparation method of TiC high-manganese steel based steel bond hard alloy |
| CN108411183A (en) * | 2018-04-28 | 2018-08-17 | 山东硕源工业机械设备有限公司 | TM52 steel bonded carbide and preparation process applied to potassium steel Jaw plate |
| CN110952015A (en) * | 2019-11-05 | 2020-04-03 | 上海海隆石油钻具有限公司 | High-strength alloy material |
| CN111101047A (en) * | 2018-10-25 | 2020-05-05 | 青海民族大学 | In-situ TiC particle and large-proportion amorphous alloy co-reinforced manganese steel-based composite material and preparation method thereof |
| CN111101074A (en) * | 2018-10-26 | 2020-05-05 | 青海民族大学 | In-situ carbide particle-embedded 3D amorphous alloy network reinforced boron steel-based composite material and preparation method thereof |
| CN111876698A (en) * | 2020-06-23 | 2020-11-03 | 西安理工大学 | Steel bonded hard alloy and preparation method thereof |
| CN112301295A (en) * | 2020-10-28 | 2021-02-02 | 常熟市电力耐磨合金铸造有限公司 | Steel bonded hard alloy and preparation method and application thereof |
| CN116445823A (en) * | 2023-03-16 | 2023-07-18 | 常熟市电力耐磨合金铸造有限公司 | TiC-based high manganese steel bonded hard alloy with high hardness and high toughness and preparation method thereof |
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2006
- 2006-05-31 CN CN 200610031772 patent/CN1851032A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195407A (en) * | 2014-09-23 | 2014-12-10 | 江苏汇诚机械制造有限公司 | Preparation method of TiC high-manganese steel based steel bond hard alloy |
| CN108411183A (en) * | 2018-04-28 | 2018-08-17 | 山东硕源工业机械设备有限公司 | TM52 steel bonded carbide and preparation process applied to potassium steel Jaw plate |
| CN111101047A (en) * | 2018-10-25 | 2020-05-05 | 青海民族大学 | In-situ TiC particle and large-proportion amorphous alloy co-reinforced manganese steel-based composite material and preparation method thereof |
| CN111101074A (en) * | 2018-10-26 | 2020-05-05 | 青海民族大学 | In-situ carbide particle-embedded 3D amorphous alloy network reinforced boron steel-based composite material and preparation method thereof |
| CN110952015A (en) * | 2019-11-05 | 2020-04-03 | 上海海隆石油钻具有限公司 | High-strength alloy material |
| CN111876698A (en) * | 2020-06-23 | 2020-11-03 | 西安理工大学 | Steel bonded hard alloy and preparation method thereof |
| CN111876698B (en) * | 2020-06-23 | 2022-01-07 | 西安理工大学 | Steel bonded hard alloy and preparation method thereof |
| CN112301295A (en) * | 2020-10-28 | 2021-02-02 | 常熟市电力耐磨合金铸造有限公司 | Steel bonded hard alloy and preparation method and application thereof |
| CN116445823A (en) * | 2023-03-16 | 2023-07-18 | 常熟市电力耐磨合金铸造有限公司 | TiC-based high manganese steel bonded hard alloy with high hardness and high toughness and preparation method thereof |
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