CN102400051A - Relieved tooth and preparation method thereof - Google Patents
Relieved tooth and preparation method thereof Download PDFInfo
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- CN102400051A CN102400051A CN2011103696266A CN201110369626A CN102400051A CN 102400051 A CN102400051 A CN 102400051A CN 2011103696266 A CN2011103696266 A CN 2011103696266A CN 201110369626 A CN201110369626 A CN 201110369626A CN 102400051 A CN102400051 A CN 102400051A
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- relieved tooth
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Abstract
The invention discloses a relieved tooth and a preparation method thereof, and the relieved tooth and the preparation method disclosed by the invention can be used for solving the problems of poor abrasion resistance and impact property of an existing relieved tooth. The relieved tooth disclosed by the invention comprises the following compositions in percentage by weight: 0.29%-0.33% of C, 0.90%-1.40% of Mn, 0.8%-1.20% of Si, 1.40%-1.70% of Cr, 0.001%-0.005% of B, 0.02%-0.06% of Al and the balance of Fe. The invention provides the preparation method for preparing the relieved tooth, and the preparation method comprises a casting process and a thermal treatment process. The relieved tooth disclosed by the invention is good in mechanical property, high in hardness, high in tensile strength and high in tenacity and can meet the special working environment requirements of a loader.
Description
Technical field
The present invention relates to a kind of teeth and preparation method thereof, relate in particular to a kind of shovel loader with teeth and preparation method thereof.
Background technology
The shovel loader teeth is the vitals on the shovel loader, is similar to people's tooth, also is consumable accessory.The shovel loader teeth directly and ore as manipulating object; Receive the intensive abrasive wear; Stressed complicacy and cycle change, and while shovel loader teeth also is accompanied by heavily stressed with the ore operation time, and its working conditions is very abominable; Therefore the wear resistance of teeth is had relatively high expectations, also require to have comprehensive mechanical performance preferably simultaneously.
Existing teeth is used wear resisting steel, for example ZGMn
13Material, hardness is HB170-210 after its solid molten processing, has good resisting strong impact ability; But its wear resistance is mainly derived from the upper layer work hardening of impacting ore and producing; The wear resistance of material itself is undesirable, and starting material and thermal treatment cost are higher, and melting technology is complicated.
Summary of the invention
The objective of the invention is to have the problems referred to above to existing technology, proposed a kind of good mechanical property, material cost is low, melting technology is simple, can satisfy the teeth of shovel loader a particular job environmental demand again.
The object of the invention can be realized through following technical proposal: a kind of teeth; The moity of its special said teeth and mass percent are: C:0.29%-0.33%, Mn:0.90%-1.40%, Si:0.8%-1.20%; Cr:1.40%-1.70%; B:0.001%-0.005%, Al:0.02%-0.06%, surplus is Fe and unavoidable impurities.
Further, in the said impurity, the mass percent of S element is smaller or equal to 0.025%, and the mass percent of P element is smaller or equal to 0.025%.
Further, the moity of said teeth and mass percent are: C:0.29%, and Mn:1.2%, Si:1.0%, Cr:1.50%, B:0.003%, Al:0.03%, surplus is Fe and unavoidable impurities.
The present invention also provides a kind of preparation method of above-mentioned teeth, comprises casting process and heat treatment step, in the said heat treatment step; Quenching temperature is 900 ℃; The back soaking time of quenching is 2 to 4 hours, and tempering temperature is 220 ℃ to 250 ℃, and soaking time is 2 to 4 hours after the tempering.
Further, in the said heat treatment step, tempering temperature is 230 ℃.
The present invention passes through the raw material of configuration specific components and mass percent, and obtains teeth of the present invention through special thermal treatment process.Its good mechanical property, have high firmness, high-tensile and H.T., satisfy the special Working environment demand of shovel loader.
Embodiment
Embodiment one
The moity of teeth and mass percent are in the present embodiment: C:0.29%, and Mn:0.90%, Si:0.8%, Cr:1.40%, B:0.001%, Al:0.02%, surplus is Fe.Simultaneously, because S, P element be to the detrimentally affect of teeth mechanical property, the mass percent that must guarantee the S element is smaller or equal to 0.025%, and the mass percent of P element is smaller or equal to 0.025%.
The C element is as the fundamental element of steel alloy, and itself and Fe, Mn form carbide, improves the hardness and the wear resistance of steel, has important solution strengthening effect.
Though the Mn element is to promote austenite former in steel alloy, therefore the Mn constituent content is all higher usually, more than 10%.Yet, guaranteeing under the austenite structure prerequisite, along with the reduction of Mn constituent content; Though stabilization of austenite descends; But the workhardness ability significantly strengthens, and wear resistance significantly improves under the high impact effect, in this enforcement Mn content is reduced to 0.90%; Both guarantee austenite structure, and can significantly improve the wear resistance of teeth again.
In steel alloy, add the Cr element and can change carbide dispersion distributional pattern in the steel, obtain with Cr
23C
6Be main granular carbide, its disperse is distributed on the Ovshinsky matrix.The Cr element of adding 1.40% can effectively improve the teeth wear resisting property more than 2 times in the present embodiment.
The B element joins the crystal boundary that can purify steel in the steel alloy as the high-meltiing alloy element, plays the effect of crystal grain thinning, and the B element of adding 0.001% can improve wear resisting property 15%-20%.
The Al element is mainly used in deoxidation and the outgassing in the alloy melting process, can cleaning molten steel.
The Si element is dissolved in the ferritic, can strongly inhibited decompose with the carbide of alleviating supercooled austenite, improves stabilization of austenite, and its content cooperates with the Mn constituent content, can effectively improve the toughness of teeth, improves intensity, yield ratio and the hardness of teeth.
After confirming the component and mass percent of teeth, its preparation technology also has considerable influence to the mechanical property of the teeth of final formation.The preparation technology of teeth comprises casting process and heat treatment step, and wherein casting process adopts conventional casting to get final product, and to the final influence maximum of teeth is heat treatment step.Heat treatment step comprise quench to heat up, the step of air cooling after the insulation back tempering, tempering.Present embodiment is for inquiring into optimum tempering temperature, to the thermal treatment and test its mechanical property under different tempering temperatures of teeth in the present embodiment, obtains experimental result such as following table 1:
Table 1
Can be found out that by last table tempering temperature is in 200 ℃ to 250 ℃ intervals, tensile strength, hardness all reduce along with the rising of temperature, and toughness improves, and reach minimum value toughness peak at 250 ℃.This mainly is that shear produces a large amount of oversaturated lath martensites because the tempering shear takes place in tempering between 200 ℃ to 250 ℃; To be that dislocation and a large amount of dislocation are staggered arrange microstructure; Hinder the crystal boundary slippage, produce phase transformation strengthening toughness effect, improve the toughness of teeth.
And when tempering temperature during greater than 250 ℃, dislocation generation slippage and climbing causes dislocation desity to reduce, and crystal boundary is moved simultaneously, and subgrain merges and causes teeth each item mechanical property to descend.
Simultaneously, because the mechanical property requirement of teeth self, in the selected present embodiment, the thermal treatment process condition of teeth is: be warming up to and quench after 900 ℃ and insulation tempering under 220 ℃ to 250 ℃ tempering temperature after 2-4 hour, be incubated 2-4 hour once more after the tempering.
By the teeth that obtains in the present embodiment, its mechanical property is good, satisfies the Working environment demand of shovel loader fully.
Embodiment two
The moity of teeth and mass percent are in the present embodiment: C:0.31%, and Mn:1.2%, Si:1.0%, Cr:1.50%, B:0.003%, Al:0.03%, surplus is Fe.Simultaneously, because S, P element be to the detrimentally affect of teeth mechanical property, the mass percent that must guarantee the S element is smaller or equal to 0.025%, and the mass percent of P element is smaller or equal to 0.025%.
Teeth is through casting process and heat treatment step in the present embodiment; Wherein heat treatment step adopts the processing condition the same with embodiment one; Promptly be warming up to and quench after 900 ℃ and insulation tempering under 220 ℃ to 250 ℃ tempering temperature after 2-4 hour, be incubated 2-4 hour once more after the tempering.Test its mechanical property such as following table 2:
Table 2
After adopting the proportioning of present embodiment, its mechanical property of teeth of utilizing the processing condition of embodiment one to make still satisfies excavator Working environment demand.
Embodiment three
The moity of teeth and mass percent are in the present embodiment: C:0.33%, and Mn:1.40%, Si:1.20%, Cr:1.70%, B:0.005%, Al:0.06%, surplus is Fe.Simultaneously, because S, P element be to the detrimentally affect of teeth mechanical property, the mass percent that must guarantee the S element is smaller or equal to 0.025%, and the mass percent of P element is smaller or equal to 0.025%.
Teeth is through casting process and heat treatment step in the present embodiment; Wherein heat treatment step adopts the processing condition the same with embodiment one; Promptly be warming up to and quench after 900 ℃ and insulation tempering under 220 ℃ to 250 ℃ tempering temperature after 2-4 hour, be incubated 2-4 hour once more after the tempering.Test its mechanical property such as following table 3:
Table 3
After adopting the proportioning of present embodiment, its mechanical property of teeth of utilizing the processing condition of embodiment one to make still satisfies shovel loader Working environment demand.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (5)
1. teeth; It is characterized in that: the moity of said teeth and mass percent are: C:0.29%-0.33%, Mn:0.90%-1.40%, Si:0.8%-1.20%; Cr:1.40%-1.70%; B:0.001%-0.005%, Al:0.02%-0.06%, surplus is Fe and unavoidable impurities.
2. teeth according to claim 1 is characterized in that: in the said impurity, the mass percent of S element is smaller or equal to 0.025%, and the mass percent of P element is smaller or equal to 0.025%.
3. teeth according to claim 2 is characterized in that: the moity of said teeth and mass percent are: C:0.31%, Mn:1.2%; Si:1.0%, Cr:1.50%, B:0.003%; Al:0.03%, surplus is Fe and unavoidable impurities.
4. preparation method who prepares any said teeth of claim 1 to 3; Comprise casting process and heat treatment step; It is characterized in that: in the said heat treatment step, quenching temperature is 900 ℃, and the back soaking time of quenching is 2 to 4 hours; Tempering temperature is 220 ℃ to 250 ℃, and soaking time is 2 to 4 hours after the tempering.
5. preparation method according to claim 4 is characterized in that: in the said heat treatment step, tempering temperature is 230 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110369626 CN102400051B (en) | 2011-11-13 | 2011-11-13 | Relieved tooth and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110369626 CN102400051B (en) | 2011-11-13 | 2011-11-13 | Relieved tooth and preparation method thereof |
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| Publication Number | Publication Date |
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| CN102400051A true CN102400051A (en) | 2012-04-04 |
| CN102400051B CN102400051B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110369626 Expired - Fee Related CN102400051B (en) | 2011-11-13 | 2011-11-13 | Relieved tooth and preparation method thereof |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073611A (en) * | 2014-07-01 | 2014-10-01 | 广东省工业技术研究院(广州有色金属研究院) | Method for preparing form relieved teeth |
| CN105886910A (en) * | 2016-04-20 | 2016-08-24 | 大连华锐重工特种备件制造有限公司 | High-performance composite form-relieved tooth used in low-temperature environment and preparation method thereof |
| CN112538590A (en) * | 2019-09-21 | 2021-03-23 | 刘波 | High-wear-resistance excavator bucket tooth and casting method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876879A (en) * | 2006-06-28 | 2006-12-13 | 宁波浙东精密铸造有限公司 | Micro-alloy weldable cast steel tooth stand and preparation method thereof |
| CN101397632A (en) * | 2008-10-31 | 2009-04-01 | 郭玉宝 | Multielement low-alloy water quenching abrasion resistant steel |
| CN101525725A (en) * | 2009-04-03 | 2009-09-09 | 宁波通达精密铸造有限公司 | Dipper tooth material |
| CN101538877A (en) * | 2009-04-09 | 2009-09-23 | 宁波通达精密铸造有限公司 | Form-relieved tooth used under low temperature environment |
| CN101555573A (en) * | 2009-04-21 | 2009-10-14 | 广州有色金属研究院 | Alloy steel and heat treatment method thereof |
-
2011
- 2011-11-13 CN CN 201110369626 patent/CN102400051B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876879A (en) * | 2006-06-28 | 2006-12-13 | 宁波浙东精密铸造有限公司 | Micro-alloy weldable cast steel tooth stand and preparation method thereof |
| CN101397632A (en) * | 2008-10-31 | 2009-04-01 | 郭玉宝 | Multielement low-alloy water quenching abrasion resistant steel |
| CN101525725A (en) * | 2009-04-03 | 2009-09-09 | 宁波通达精密铸造有限公司 | Dipper tooth material |
| CN101538877A (en) * | 2009-04-09 | 2009-09-23 | 宁波通达精密铸造有限公司 | Form-relieved tooth used under low temperature environment |
| CN101555573A (en) * | 2009-04-21 | 2009-10-14 | 广州有色金属研究院 | Alloy steel and heat treatment method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073611A (en) * | 2014-07-01 | 2014-10-01 | 广东省工业技术研究院(广州有色金属研究院) | Method for preparing form relieved teeth |
| CN105886910A (en) * | 2016-04-20 | 2016-08-24 | 大连华锐重工特种备件制造有限公司 | High-performance composite form-relieved tooth used in low-temperature environment and preparation method thereof |
| CN112538590A (en) * | 2019-09-21 | 2021-03-23 | 刘波 | High-wear-resistance excavator bucket tooth and casting method thereof |
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| Publication number | Publication date |
|---|---|
| CN102400051B (en) | 2013-06-12 |
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