CN102277535B - Ridger tooth alloy material and preparation method thereof - Google Patents
Ridger tooth alloy material and preparation method thereof Download PDFInfo
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- CN102277535B CN102277535B CN 201110233318 CN201110233318A CN102277535B CN 102277535 B CN102277535 B CN 102277535B CN 201110233318 CN201110233318 CN 201110233318 CN 201110233318 A CN201110233318 A CN 201110233318A CN 102277535 B CN102277535 B CN 102277535B
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Abstract
The invention discloses a ridger tooth alloy material which is characterized by comprising the following components in percentage by weight: 0.20-0.30% C, 0.80-1.50% of Si, 0.80-1.50% of Mn, 1.20-2.00% of Cr, 0.20-0.80% of Mo, 0.20-0.80% of Ni and the balance of iron. The invention also provides a preparation method of the ridger tooth alloy material. The alloy material has the advantages of high strength, good abrasive resistance, good plasticity and impact toughness, fewer fractures and longer service life.
Description
Technical field
The present invention relates to technical field of alloy material, be specifically related to a kind of ridger tooth alloy material for the preparation of the ridge buster tooth and preparation method thereof.
Background technology
Ridge buster tooth (also can claim the ridge buster bucket tooth) is a type of excavator bucket teeth, and its environment for use requires to possess that wear resistance is good, intensity is high, good toughness, the performance that does not rupture in the course of the work.The failure mode of ridge buster tooth is wearing and tearing and fracture, and wearing and tearing are normal inefficacies, and fracture is improper inefficacy, and fracture is due to undercapacity or impelling strength low causing too.Ridge buster needs to change immediately in case fracture just can not be used.Ridge buster tooth on the existing market by inquiry with client feedback, because working condition is abominable, be easy to fracture in the course of the work and the ridge buster tooth that lost efficacy is not within minority.
And, the external forging procesies that adopt of existing ridge buster tooth more, same ridge buster tooth, its production cost will be higher than the casting technique cost.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, provide that a kind of intensity is high, wear resistance good, plasticity and impelling strength are good, can reduce fracture, thereby improve the ridger tooth alloy material in work-ing life.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of ridger tooth alloy material, this material is comprised of each component of following weight percent: C0.20% ~ 0.23%, Si1.25% ~ 1.50%, Mn0.80% ~ 0.95%, Cr1.30% ~ 1.80%, Mo0.30% ~ 0.35%, Ni0.30% ~ 0.60%, surplus are iron.
As most preferably, ridger tooth alloy material of the present invention, this material is comprised of each component of following weight percent: C0.23%, Si1.25%, Mn0.95%, Cr1.60%, Mo0.35%, Ni0.50%, surplus is iron.
Carbon: high carbon content can improve intensity, hardness and the wear resistance of steel, but when carbon content in steel during greater than 0.30 ﹪, inevitably more twins sub-structure will occur after quenching, this makes plasticity and the impact toughness decreased of steel, and might increase the quenching crack tendency; When in steel, carbon content is less than 0.30 ﹪, can obtain almost all low carbon martensite of lath-shaped, not only have high plasticity and impelling strength, but also have low fatigue notch sensitivity.
Especially in ice box work, and require at low temperatures the bucket tooth of high strength and high tenacity, it is very suitable adopting low-carbon martensite strengthening.Because the large percentage of the ridge buster tooth of material produce fracture in the past thinks that low of impelling strength causes, from improving the impelling strength of steel, select lower carbon content, control 0.20 ~ 0.30 ﹪ scope.
Alloying element: improve the intensity of ridge buster tooth, must add alloying element to strengthen on the basis of low carbon martensite, at first consider Si here, Mn, Cr, 4 kinds of elements such as Mo.In order to improve the impelling strength of steel, also must add the Ni element.
Silicon and manganese: under quenching low-temperaturetempering state, silicon and manganese are apparent in view to the strengthening effect of steel; Can increase the plasticity of steel when silicon and manganese content 0.8 ~ 1.5 ﹪; The compound action that silicon and manganese coordinate is hit toughness to the raising steel drift good effect;
The silicon nucleation and growth that can effectively stop Fe3C the same as nickel, thus the generation of temper brittleness postponed, and this just can the corresponding raising of the tempering temperature of steel, like this, can further improve plasticity and the toughness of steel in the high-intensity while of assurance.
Manganese can significantly improve the hardening capacity of steel, but the easy generation of excessive manganese is overheated, increases the Austenite Grain Growth tendency, should suitably control.
Chromium, nickel, molybdenum: chromium and molybdenum can improve the hardening capacity of steel, crystal grain thinning; Chromium can make the impelling strength of steel remain on higher level, and particularly the effect under chromium, nickel, the common cooperation of molybdenum multicomponent alloy is larger; Add the molybdenum of 0.2 ~ 0.8 ﹪ to the impelling strength that improves steel, obvious effect to be arranged; Nickel can improve the low-temperature performance of steel, is the best alloying element of impelling strength effect that improves steel; Nickel also can make the plasticity of quenching low-temperaturetempering steel constantly increase with the increase of its content.
Another technical problem that the present invention will solve is, also discloses a kind of preparation method of above-mentioned ridger tooth alloy material, and concrete preparation process is:
(1) according to the normal melting technology of cast steel, at first according to formula rate, each component is melted, then temperature is risen to 1600 ~ 1640 ℃, and come out of the stove after adding aluminium deoxidation to drag for slag, 1520 ~ 1560 ℃ of pouring molten steel temperature, after casting complete, foundry goods is heat-treated after the demoulding, polishing cleaning;
(2) thermal treatment: normalizing: step (1) gained foundry goods is heated to 900 ~ 1000 ℃, is incubated 1.5 ~ 2.5 hours and makes the foundry goods heat penetration, then come out of the stove and be cooled to room temperature in air;
Quench: the foundry goods after normalizing is quenched, and quenching temperature is 880 ~ 1000 ℃, is incubated 1.5 ~ 2.5 hours and makes the foundry goods heat penetration, is positioned over after then foundry goods is come out of the stove and is quickly cooled to room temperature in water;
Tempering: the foundry goods after quenching carries out tempering, and the main purpose of temper is to eliminate stress, and stabilizing tissue improves comprehensive mechanical property and wear resistance, and the tempering Heating temperature is 220～300 ℃, and soaking time was cooled to room temperature after 3 ~ 5 hours.
Advantage of the present invention and beneficial effect:
1. the present invention selects lower carbon content, adopts multiple alloying element and reasonably combined, makes the ridge buster tooth of preparation have that intensity is high, wear resistance good, and plasticity and impelling strength are good, can reduce fracture, thereby improve the advantage in work-ing life;
2. ridge buster tooth of the present invention obtains the lath martensite tissue of high-strong toughness by thermal treatment, not only has high plasticity and impelling strength, but also has low fatigue notch sensitivity.Especially in ice box work, and to require at low temperatures the bucket tooth of high strength and high tenacity to adopt low-carbon martensite strengthening be very suitable.
3. the casting technique of the present invention's employing prepares material, and is relatively low with respect to the forging process cost, and the chemical composition adjustment is very convenient, and the forging process of prior art is produced the cost that a same ridge buster tooth needs 10 times of the present invention.
Description of drawings
Fig. 1 is that the ridge buster tooth product of three kinds of differing materials preparations is using an as a child rear different length lateral plan.
Fig. 2 is that the ridge buster tooth product of three kinds of differing materials preparations is using an as a child rear different length front view.
In figure, the left side is the ridge buster tooth of the VR-47M-2M-03 preparation on market, and middle be the ridge buster tooth of commercially available 475T material preparation, the rightmost side be material of the present invention (being numbered VR-47M-2M-041) prepare the ridge buster tooth.
Embodiment
Below by embodiment, the present invention is described in further detail, but the present invention not only is confined to following examples.
Embodiment 1
Consisting of of ridger tooth alloy material: C0.23%, Si1.25%, Mn0.95%, Cr1.60%, Mo0.35%, Ni0.50%, surplus is iron.。
(1) according to the normal melting technology of cast steel, at first with steel scrap, ferrosilicon, ferrochrome, ferromanganese batching, after molten steel fusing, stokehold adjusting component are qualified, temperature is risen to 1600 ~ 1640 ℃, and come out of the stove after adding aluminium deoxidation to drag for slag, 1520 ~ 1560 ℃ of pouring molten steel temperature, foundry goods is heat-treated after the polishing cleaning.
(2) thermal treatment of cast steel:
Normalizing: step (1) gained foundry goods is heated to 900 ~ 1000 ℃, is incubated 2 hours and makes the foundry goods heat penetration, then come out of the stove and be cooled to room temperature in air;
Quench: the quenching temperature of cast steel is 880 ~ 1000 ℃, is incubated 2 hours and makes the foundry goods heat penetration, and then coming out of the stove to be positioned over is quickly cooled to room temperature in water;
Tempering: the main purpose of temper is to eliminate stress, and stabilizing tissue improves comprehensive mechanical property and wear resistance, and the tempering Heating temperature is 220～300 ℃, and then soaking time 3 ~ 5 hours is cooled to room temperature in air.
Embodiment 2
Consisting of of ridger tooth alloy material: C0.21%, Si0.9%, Mn0.85%, Cr1.25%, Mo0.25%, Ni0.25%, surplus is iron, preparation process is with embodiment 1.
Embodiment 3
Consisting of of ridger tooth alloy material: C0.28%, Si1.4%, Mn1.2%, Cr1.8%, Mo0.75%, Ni0.7%, surplus is iron, preparation process is with embodiment 1.
The microstructure and property of cast steel
Ridger tooth alloy material sample after the normalizing of embodiment of the present invention process, quenching, low-temperaturetempering, it is organized as the above lath-shaped low carbon martensite of 98 ﹪, and mechanical property is as shown in table 1 below:
Ridger tooth alloy material sample after table 1 embodiment of the present invention process quenching low-temperaturetempering
| Hardness | Tensile strength | Elongation | Impact AKV |
| HB440~500 | 1450~1550MPa | 6~9﹪ | 20~30J |
Application example
With the meshing golden novel material of above-mentioned ridge buster of the present invention (casting technique) and U.S. Ka Te. the ridge buster tooth that Pi Le company (forging process) produces, use on the spot under the same more abominable working condition in Jinhua, Zhejiang Province city and compare, the ridge buster tooth of card special product can be with 6 days approximately 48 hours, and failure mode is wearing and tearing.The ridge buster tooth that our company produces uses approximately not fracture in 40 ~ 50 hours in 4 ~ 6 days.
The tine of Japan MB company was used the M-03 material produce originally, and customers' responsiveness ruptures many sometimes.Adopt the tine of material produce of the present invention, very satisfied after use, and the tine produced with forging process of the tine of specially M-03, material of the present invention being produced with casting technique and other factories carries out on the spot usage comparison and tests, and results verification the present invention is best, sees accompanying drawing 1-2.
Test process: choosing has the leftmost side product in VR-47M-2M-03(Fig. 1-2 on the existing market) and 475T(Fig. 1-2 in the mid-way product) the ridge buster tooth for preparing, and the ridge buster tooth of material preparation of the present invention, material number of the present invention is rightmost side product in VR-47M-2M-041(Fig. 1-2).
The test of A district: about 25 meters of the length in the zone of loosening the soil, the every pine of ridge buster tooth once soil approximately need 45 to 55 seconds.The machine operator decides the speed of tine according to the hardness of bottom layer tissue, between three kinds of products, the gap of 10 seconds is arranged on speed.In this zone, machine operation 30 minutes, this tine loosens the soil 35 times.
The B domain test: about 35 meters of the length in the zone of loosening the soil, the every pine of ridge buster once soil approximately need 55 to 60 seconds.In this zone, machine operation 30 minutes, this tine loosens the soil 25 times.
Before material VR-47M-2M-041 of the present invention was untapped, that we use always was VR-47M-2M-03.This product sometimes can be serious wearing and tearing, fracture, and there is no the length of M-041 its work-ing life.Yet as shown in Figure 2, the tooth after wearing and tearing can become pointed shape, is conducive to so better insert into stratum.
Use this forge piece of 475T.Its work-ing life is also shorter than M-03's, can be easy to after use be polished (quick abrasion), and the shape of this crown that polishes is not fine for the insert into stratum effect.
Show that from above-mentioned application example and accompanying drawing 1-2 result can draw, in equal working conditions with under duration of service, that the ridge buster dental transition of adopting material of the present invention to prepare adds is wear-resisting, easy fracture not, long service life.
Claims (2)
1. ridger tooth alloy material, it is characterized in that: this material is comprised of each component of following weight percent: C0.23%, Si1.25%, Mn0.95%, Cr1.60%, Mo0.35%, Ni0.50%, surplus is iron.
2. the preparation method of a ridger tooth alloy material claimed in claim 1, it is characterized in that: preparation process comprises:
(1) according to the normal melting technology of cast steel, at first according to formula rate, each component is melted, then temperature is risen to 1600～1640 ℃, and come out of the stove after adding aluminium deoxidation to drag for slag, 1520～1560 ℃ of pouring molten steel temperature, after casting complete, foundry goods is heat-treated after the demoulding, polishing cleaning;
(2) thermal treatment:
Normalizing: step (1) gained foundry goods is heated to 900～1000 ℃, is incubated 1.5～2.5 hours and makes the foundry goods heat penetration, then come out of the stove and be cooled to room temperature in air;
Quench: the foundry goods after normalizing is quenched, and quenching temperature is 880～1000 ℃, is incubated 1.5～2.5 hours and makes the foundry goods heat penetration, is positioned over after then foundry goods is come out of the stove and is quickly cooled to room temperature in water;
Tempering: the foundry goods after quenching carries out tempering, and the tempering Heating temperature is 220～300 ℃, and soaking time was cooled to room temperature after 3～5 hours.
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| CN 201110233318 CN102277535B (en) | 2011-08-12 | 2011-08-12 | Ridger tooth alloy material and preparation method thereof |
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| CN 201110233318 CN102277535B (en) | 2011-08-12 | 2011-08-12 | Ridger tooth alloy material and preparation method thereof |
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| CN102277535B true CN102277535B (en) | 2013-06-05 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589971B (en) * | 2013-11-01 | 2016-09-14 | 宁波宇翔机械铸造有限公司 | A kind of bucket tooth and manufacture method thereof |
| CN103736976B (en) * | 2013-11-15 | 2015-10-14 | 东南大学 | Alloy tine on a kind of loosenning tiller and manufacture method thereof |
| KR102205618B1 (en) * | 2013-12-26 | 2021-01-21 | 두산인프라코어 주식회사 | Cast steel for construction equipment bucket parts and parts for construction equipment bucket comprising the same |
| CN104651729B (en) * | 2014-05-16 | 2017-05-17 | 柳州市友军机械配件铸造有限公司 | Steel for bucket teeth of construction machinery and preparation method of bucket teeth |
| CN104213034A (en) * | 2014-08-08 | 2014-12-17 | 安徽昱工耐磨材料科技有限公司 | Low-alloy steel material and heat treatment process |
| CN106086623A (en) * | 2016-07-13 | 2016-11-09 | 江苏东顺新能源科技有限公司 | A kind of die forging bucket tooth material and die forging bucket tooth processing technique |
| CN107385357A (en) * | 2017-08-04 | 2017-11-24 | 安徽省宁国市亚晨碾磨铸件有限责任公司 | A kind of excavator multicomponent alloy steel bucket tooth and its preparation technology |
| CN109338226B (en) * | 2018-11-20 | 2020-09-25 | 中铁工程装备集团隧道设备制造有限公司 | Material for high-performance TBM cutter head scraper plate and preparation method thereof |
| CN110273447A (en) * | 2019-06-28 | 2019-09-24 | 上海三一重机股份有限公司 | Excavator bucket teeth and its manufacturing method |
| CN110373614A (en) * | 2019-08-30 | 2019-10-25 | 山东能源重装集团乾泰精密机械有限公司 | A kind of abrasion resistant cast steel and preparation method thereof |
| CN114277320A (en) * | 2021-12-28 | 2022-04-05 | 内蒙古科技大学 | High-strength and high-wear-resistance tooth tip steel for bucket shovel and preparation method thereof |
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| CN102140612A (en) * | 2011-02-23 | 2011-08-03 | 上海三一重机有限公司 | Multi-component alloy cast steel bucket tooth and production process thereof |
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Patent Citations (3)
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| CN1557984A (en) * | 2004-01-18 | 2004-12-29 | 江苏省机电研究所有限公司 | High hardness high ductility wear-resistant steel |
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| CN102140612A (en) * | 2011-02-23 | 2011-08-03 | 上海三一重机有限公司 | Multi-component alloy cast steel bucket tooth and production process thereof |
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