CN102304673A - Alloy steel used for casting track plate, track plate and preparation method and construction machinery of track plate - Google Patents
Alloy steel used for casting track plate, track plate and preparation method and construction machinery of track plate Download PDFInfo
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- CN102304673A CN102304673A CN201110273657A CN201110273657A CN102304673A CN 102304673 A CN102304673 A CN 102304673A CN 201110273657 A CN201110273657 A CN 201110273657A CN 201110273657 A CN201110273657 A CN 201110273657A CN 102304673 A CN102304673 A CN 102304673A
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Abstract
The invention discloses an alloy steel used for casting a track plate. The alloy steel comprises the following components in percent by weight: 0.3-0.37% of C, 0.75-1.05% of Mn, 0.30-0.65% of Si, 0-0.02% of S, 0-0.02% of P, 0.50-1.10% of Ni, 0.70-0.90% of Cr, 0.40-0.60% of Mo, 0.02-0.05% of Al, 0-0.02% of Cu, 0-0.01% of B and 95.21-97.03% of Fe. The invention also discloses a method for preparing the track plate with the alloy steel, the prepared track plate and construction machinery. By using the alloy steel with alloy elements such as nickel, chromium, molybdenum and the like, the strength and rigidity of the track plate can be increased. In addition, by performing quenching and tempering on the track plate as well as quenching on the wheeling surface, the overall strength and surface wear resistance can be further increased so that the pin can have enough strength to bear extrusion, extension and shock.
Description
Technical field
The present invention relates to the crawler belt of engineering machinery, particularly, relate to a kind of steel alloy, grip-pad and method of manufacture thereof of the grip-pad of casting and comprise the engineering machinery of this grip-pad.
Background technology
Use the engineering machinery of crawler belt to have good movability, thereby can be applicable to the different working occasion neatly.For example, crawler mounted crane is little with its grounding pressure, and radius of turn is little, and gradeability is big, and lifting performance is good, and the trafficability characteristic of machine, maneuvering ability, the more high many advantages of handiness are favored by construction market such as petrochemical industry, nuclear power, wind-powered electricity generation, thermoelectricitys.
Crawler belt is interconnected by a plurality of grip-pads and constitutes.As depicted in figs. 1 and 2, grip-pad generally includes base plate 1, be arranged on the casing 2 on the base plate 1 and be arranged on a plurality of pin ears 3 of casing 2 both sides.A plurality of grip-pads link together through the pin ear 3 of correspondence, to form crawler belt.The complete machine of crawler crane and hang weight-carrying capacity and be delivered on the grip-pad, and be delivered to ground through grip-pad through thrust wheel, thereby actions such as walking, turning will make pin ear 3 be squeezed, stretch and impact etc.In addition, because pin ear 3 inhomogeneous layout normally, as depicted in figs. 1 and 2, casing 2 every sides have 5 pin ears 3 separately, and have three pin ears and two pin ears respectively in the medullary ray A-A both sides of the length direction of base plate 1.In addition, shown in I portion among Fig. 3 shown in, pin ear 3 is the comparatively weak positions of pin ear 3 intensity with the excessive junction of casing 2.Therefore when bearing extruding, stretch and impacting, each sells extruding, stretching and shock action inequality that ear receives, causes the drawing crack of pin ear easily, and crawler belt (particularly grip-pad be used for the capable face 4 of wheel that engages with wheel) is also therefore impaired.
Summary of the invention
Problem to be solved by this invention is to improve extruding, stretching and the ballistic performance that grip-pad bears.
To achieve these goals, the present invention provides a kind of steel alloy of the grip-pad of casting, and wherein, the weight percent of the composition of this steel alloy is: C:0.3-0.37%; Mn:0.75-1.05%, Si:0.30-0.65%, S:0-0.02%, P:0-0.02%; Ni:0.50-1.10%, Cr:0.70-0.90%, Mo:0.40-0.60%, Al:0.02-0.05%; Cu:0-0.02%, B:0-0.01%, Fe:95.21-97.03%.
The present invention also provides a kind of method of manufacture of grip-pad, and this method comprises: (a), use steel alloy casting grip-pad of the present invention; (b) said grip-pad is carried out modifier treatment; (c) the capable face of wheel to said grip-pad carries out hard surfacing.
Preferably, in step (b), quenching temperature is 850-880 ℃.
Preferably, in step (b), tempering temperature is 550-600 ℃.
Preferably, in step (c), use induction heating to carry out hard surfacing, the frequency of heating power supply is 2.5-8khz, and quenching temperature is 860-880 ℃.
Preferably, the said degree of depth of taking turns the hard surfacing layer of capable face is 3-5mm, and hardness is HRC40-50.
The present invention also provides a kind of grip-pad, and wherein, this grip-pad is by method manufacturing of the present invention.
Preferably, said grip-pad comprises base plate, is arranged on the casing on this base plate, and a plurality of pin ears that are arranged on these casing both sides, and in a plurality of pin ears of every side of said casing, the quantity of pin ear of medullary ray both sides of broad ways that is positioned at said base plate is identical.
Preferably, it is identical to be arranged on the quantity of pin ear of said casing both sides.
Preferably, the pin ear that is arranged on said casing both sides is the benchmark setting that is centrosymmetric with the center of said base plate.
Preferably, said base plate is provided with first gusset, and this first gusset connects the corresponding pin ear in said casing both sides.
Preferably; The length direction that is arranged on the said base plate in pin ear edge of said casing both sides is arranged alternately; Except that the pin ear that is positioned at two ends; Each pin ear is corresponding with two pin ears of opposite side and pass through said first gusset connection, and said first gusset favours the length direction and the width setting of said base plate.
Preferably, said base plate is provided with second gusset, and this second gusset connects the both sides of said casing.
Preferably, said pin ear has those widened sections and is connected with said casing with said base plate through this those widened sections.
The present invention also provides a kind of engineering machinery, and wherein, this project machinery comprises crawler belt, and this crawler belt is connected to each other by grip-pad of the present invention and constitutes.
The steel alloy casting grip-pad that contains alloying elements such as nickel, chromium, molybdenum of the application of the invention can make the intensity of grip-pad, rigidity increase.In addition,, can further improve bulk strength and surface abrasion resistance property, thereby guarantee that the pin ear can have enough intensity and bear extruding, stretches and impact through grip-pad being carried out modifier treatment and carrying out hard surfacing to taking turns capable face.
Other features and advantages of the present invention will partly specify in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification sheets, is used to explain the present invention with following embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of the existing grip-pad of explanation;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the side-view of Fig. 2, is used to explain being connected of pin ear and casing;
Fig. 4 is the structural representation of explanation grip-pad of the present invention;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the side-view of Fig. 5, is used to explain being connected of pin ear of the present invention and casing.
Description of reference numerals
1: base plate 2: casing 3: pin ear 3a: those widened sections
4: 6: the second gussets of wheel row 5: the first gussets of face
Embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
In the present invention, do not doing under the situation of opposite explanation, term is like " length direction " left and right directions with reference to Fig. 5, and " width " is with reference to the above-below direction of Fig. 5.The noun of locality that uses typically refers to reference to upper and lower, left and right shown in the drawings like " upper and lower, left and right "; " inside and outside " is meant inside and outside with respect to the profile of each parts itself.
According to an aspect of the present invention, a kind of steel alloy of the grip-pad of casting is provided, wherein, the weight percent of the composition of this steel alloy is: C:0.3-0.37%; Mn:0.75-1.05%, Si:0.30-0.65%, S:0-0.02%, P:0-0.02%; Ni:0.50-1.10%, Cr:0.70-0.90%, Mo:0.40-0.60%, Al:0.02-0.05%; Cu:0-0.02%, B:0-0.01%, Fe:95.21-97.03%.
In mentioned component, nickel can improve the intensity of steel, and keeps good plasticity and toughness, and among the present invention, the content of nickel is 0.50-1.10%.Chromium can significantly improve intensity, hardness and wear resistance, but reduces plasticity and toughness simultaneously, so the content of chromium is 0.70-0.90% among the present invention.Molybdenum can make the grain refining of steel, improves hardening capacity, and the content of molybdenum is 0.40-0.60% among the present invention.
According to a further aspect in the invention, a kind of method of manufacture of grip-pad is provided, this method comprises: (a), use steel alloy casting grip-pad of the present invention; (b) said grip-pad is carried out modifier treatment (i.e. quenching+high tempering); (c) the capable face 4 of wheel to said grip-pad carries out hard surfacing.
Through carrying out modifier treatment, can make the higher intensity of the whole acquisition of grip-pad, thereby can bear extruding, stretch and impact, and obtain certain wear resistance.Through carrying out hard surfacing, can further improve the intensity and the wear resistance of wheel row face 4 to taking turns capable face 4.
Preferably, in step (b), quenching temperature is 850-880 ℃.
Preferably, in the modifier treatment, tempering temperature is 550-600 ℃.
In addition, preferably, in step (c), use induction heating to carry out hard surfacing, the frequency of heating power supply is 2.5-8khz, and quenching temperature is 860-880 ℃.
More preferably, can make the said degree of depth of taking turns the hard surfacing layer of capable face 4 is 3-5mm, and hardness is HRC40-50.
Through specific embodiment making method of the present invention is described below.
The steel alloy of the composition shown in the use table 1 is cast.In the modifier treatment: be heated to 880 ℃ and be incubated 2.5 hours with foundry goods (grip-pad) and with the stove coupon during quench treatment, adopt water-cooled during cooling; Carry out high tempering after the quenching, be heated to 600 ℃ and be incubated 2.5 hours, adopt water-cooled during cooling with foundry goods and with the stove coupon.During hard surfacing, use the power supply of 2.5khz to heat, foundry goods is heated to 860 ℃ after water spray cooling fast immediately, the degree of depth of hard surfacing layer is 3mm.
Table 1
| Element | ?C | Mn | Si | Ni | Cr | Mo | Al | Fe |
| Weight % | ?0.3 | 0.75 | 0.30 | 0.5 | 0.7 | 0.4 | 0.02 | 97.03 |
Use the method for embodiment 1 to make grip-pad.Wherein, the steel alloy of the composition shown in the use table 2 is cast.In the modifier treatment: be heated to 870 ℃ and be incubated 2.5 hours with foundry goods (grip-pad) and with the stove coupon during quench treatment, adopt water-cooled during cooling; Carry out high tempering after the quenching, be heated to 580 ℃ and be incubated 2.5 hours, adopt water-cooled during cooling with foundry goods and with the stove coupon.During hard surfacing, use the power supply of 3khz to heat, foundry goods is heated to 870 ℃ after water spray cooling fast immediately, the degree of depth of hard surfacing layer is 3.5mm
Table 2
| Element | C | Mn | Si | S | P | Ni | Cr | Mo | Al | Cu | B | Fe |
| Weight % | 0.32 | 0.85 | 0.40 | 0.02 | 0.02 | 0.8 | 0.8 | 0.6 | 0.05 | 0.02 | 0.01 | 96.11 |
Use the method for embodiment 1 to make grip-pad.Wherein, the steel alloy of the composition shown in the use table 3 is cast.In the modifier treatment: be heated to 860 ℃ and be incubated 2.5 hours with foundry goods (grip-pad) and with the stove coupon during quench treatment, adopt water-cooled during cooling; Carry out high tempering after the quenching, be heated to 550 ℃ and be incubated 2.5 hours, adopt water-cooled during cooling with foundry goods and with the stove coupon.During hard surfacing, use the power supply of 5khz to heat, foundry goods is heated to 880 ℃ after water spray cooling fast immediately, the degree of depth of hard surfacing layer is 4mm
Table 3
| Element | C | Mn | Si | S | P | Ni | Cr | Mo | Al | Cu | B | ?Fe |
| Weight % | 0.37 | 1.05 | 0.60 | 0.01 | 0.01 | 1.1 | 0.9 | 0.5 | 0.03 | 0.01 | 0.007 | ?95.35 |
Use the method for embodiment 1 to make grip-pad.Wherein, the steel alloy of the composition shown in the use table 4 is cast.In the modifier treatment: be heated to 850 ℃ and be incubated 2.5 hours with foundry goods (grip-pad) and with the stove coupon during quench treatment, adopt water-cooled during cooling; Carry out high tempering after the quenching, be heated to 560 ℃ and be incubated 2.5 hours, adopt water-cooled during cooling with foundry goods and with the stove coupon.During hard surfacing, use the power supply of 8khz to heat, foundry goods is heated to 880 ℃ after water spray cooling fast immediately, the degree of depth of hard surfacing layer is 5mm
Table 4
| Element | C | Mn | Si | S | P | Ni | Cr | Mo | Al | Cu | B | Fe |
| Weight % | 0.35 | 0.95 | 0.65 | 0.02 | 0.02 | 1.0 | 0.9 | 0.6 | 0.03 | 0.02 | 0.01 | 95.45 |
Use the method for embodiment 2 to make grip-pad.Wherein, the steel alloy of the composition shown in the use table 5 is cast.In the modifier treatment: be heated to 880 ℃ and be incubated 2.5 hours with foundry goods (grip-pad) and with the stove coupon during quench treatment, adopt water-cooled during cooling; Carry out high tempering after the quenching, be heated to 590 ℃ and be incubated 2.5 hours, adopt water-cooled during cooling with foundry goods and with the stove coupon.During hard surfacing, use the power supply of 5khz to heat, foundry goods is heated to 880 ℃ after water spray cooling fast immediately, the degree of depth of hard surfacing layer is 4mm
Table 5
| Element | C | Mn | Si | S | P | Ni | Cr | Mo | Al | Cu | B | Fe |
| Weight % | 0.34 | 0.8 | 0.35 | 0.02 | 0.02 | 1.1 | 0.9 | 0.6 | 0.03 | 0.02 | 0.01 | 95.81 |
Comparative Examples
Use the method for embodiment 1 to make grip-pad, wherein, use ZG34Cr2Ni2Mo to cast.Wherein ZG34Cr2Ni2Mo main chemical compositions content is C:0.3%, Mn:0.7%, and Si:0.30%, S:0.03%, P:0.02%, Ni:1.5%, Cr:1.6%, Mo:0.25%, surplus is Fe.
Make the as shown in table 6 with stove coupon strength property test result of grip-pad through embodiment 1-5 and Comparative Examples, the numbering of embodiment 1-5 and Comparative Examples is followed successively by 6.
Table 6
According to a further aspect in the invention, a kind of grip-pad is provided, wherein, this grip-pad is by method manufacturing of the present invention.
Preferably; As shown in Figure 5; Said grip-pad comprises base plate 1, is arranged on the casing 2 on this base plate 1, and a plurality of pin ears 3 that are arranged on these casing 2 both sides; In a plurality of pin ears 3 of every side of said casing 2, the quantity of pin ear 3 of medullary ray A-A both sides of broad ways that is positioned at said base plate 1 is identical.
A plurality of pin ears 3 through making casing 2 every sides are that benchmark half-and-half is provided with the medullary ray A-A of the broad ways of base plate 1; The a plurality of pin ears 3 of this of every side can evenly bear extruding, stretching and the impact between the grip-pad that connects through these a plurality of pin ears 3 along its length; Avoided pin ear 3 to tear, and the crawler belt of avoiding causing because of 3 drawing cracks of pin ear is impaired because of inhomogeneous carry load.
In addition, it is identical to be arranged on the quantity of pin ear 3 of said casing 2 both sides.For example, in embodiment shown in Figure 5, the both sides of casing 2 have 6 pin ears 3 respectively, thereby can also evenly bear extruding along the width of base plate 1, stretch and impact.
More preferably, can make the pin ear 3 that is arranged on said casing 2 both sides is the benchmark setting that is centrosymmetric with the center of said base plate 1.Wherein, the center of base plate 1 is the width centreline of base plate 1 and the intersection point of length medullary ray A-A.Through this layout, the pin ear 3 through correspondence need not to distinguish direction when connecting a plurality of grip-pad successively.Particularly, grip-pad shown in Figure 5 can be connected with same localized grip-pad shown in Figure 5, also can be connected with grip-pad with shown in Figure 5 (or counterclockwise) clockwise Rotate 180 degree.
In preferred implementation of the present invention, as shown in Figure 5, can be provided with first gusset 5 on the said base plate 1, this first gusset 5 connects the corresponding pin ear 3 in said casing 2 both sides.Through first gusset 5 is set, can unites and strengthen the corresponding pin ear 3 in casing 2 both sides.
More preferably; As shown in Figure 5; The length direction of the said base plate 1 in pin ear 3 edges that is arranged on said casing 2 both sides is arranged alternately; Except that the pin ear 3 that is positioned at two ends, two pin ears of each pin ear 3 and opposite side 3 are corresponding and through 5 connections of said first gusset, and said first gusset 5 favours the length direction and the width setting of said base plate 1.Through this layout, except that the pin ear 3 that is positioned at two ends, each pin ear 3 is united reinforcement with two pin ears 3 of casing 2 opposite sides, thereby can make all pin ears 3 unite reinforcement directly or indirectly.
In addition, can also be provided with second gusset 6 on the said base plate 1, this second gusset 6 connects the both sides of said casing 2.Through second gusset 6 is set, can make the both sides of casing 2 unite reinforcement.
Preferably, shown in the middle II portion as shown in Figure 6, said pin ear 3 can have those widened sections 3a and be connected (position that is connected with base plate 1 of those widened sections 3a is not shown) with said casing 2 with said base plate 1 through this those widened sections 3a.Through be provided with those widened sections 3a can the reinforcement pins ear 3 with the strength of joint of base plate 1 and reinforcement pins ear 3 strength of joint with casing 2, and can make strong pin ear 3 mild with the junction transition of casing 2 with the junction and the pin ear 3 of base plate 1, avoid stress concentration.
Also on the other hand a kind of engineering machinery is provided according to of the present invention, wherein, this project machinery comprises crawler belt, and this crawler belt is connected to each other by grip-pad of the present invention and constitutes.Particularly, a plurality of grip-pads can connect with the formation crawler belt through corresponding pin ear 3, thereby are assemblied on the engineering machinery.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned embodiment; In technical conceive scope of the present invention, can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characterictic described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out arbitrary combination between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (15)
1. the steel alloy of the grip-pad of casting is characterized in that, the weight percent of the composition of this steel alloy is: C:0.3-0.37%, Mn:0.75-1.05%; Si:0.30-0.65%, S:0-0.02%, P:0-0.02%, Ni:0.50-1.10%; Cr:0.70-0.90%, Mo:0.40-0.60%, Al:0.02-0.05%; Cu:0-0.02%, B:0-0.01%, Fe:95.21-97.03%.
2. the method for manufacture of a grip-pad, this method comprises:
(a), use the described steel alloy casting of claim 1 grip-pad;
(b) said grip-pad is carried out modifier treatment;
(c) the capable face of wheel (4) to said grip-pad carries out hard surfacing.
3. method according to claim 2, wherein, in step (b), quenching temperature is 850-880 ℃.
4. method according to claim 2, wherein, in step (b), tempering temperature is 550-600 ℃.
5. method according to claim 2 wherein, in step (c), uses induction heating to carry out hard surfacing, and the frequency of heating power supply is 2.5-8khz, and quenching temperature is 860-880 ℃.
6. method according to claim 5, wherein, the said degree of depth of taking turns the hard surfacing layer of capable face (4) is 3-5mm, hardness is HRC40-50.
7. a grip-pad is characterized in that, this grip-pad is by according to any described method manufacturing among the claim 2-6.
8. grip-pad according to claim 7; Wherein, Said grip-pad comprises base plate (1), is arranged on the casing (2) on this base plate (1), and a plurality of pin ears (3) that are arranged on this casing (2) both sides; In a plurality of pin ears (3) of every side of said casing (2), the quantity of pin ear (3) of medullary ray (A-A) both sides of broad ways that is positioned at said base plate (1) is identical.
9. grip-pad according to claim 8, wherein, the quantity of pin ear (3) that is arranged on said casing (2) both sides is identical.
10. grip-pad according to claim 9, wherein, the pin ear (3) that is arranged on said casing (2) both sides is the benchmark setting that is centrosymmetric with the center of said base plate (1).
11. grip-pad according to claim 8, wherein, said base plate (1) is provided with first gusset (5), and this first gusset (5) connects the corresponding pin ear (3) in said casing (2) both sides.
12. grip-pad according to claim 11; Wherein, The length direction that is arranged on pin ear (3) the said base plate in edge (1) of said casing (2) both sides is arranged alternately; Except that the pin ear (3) that is positioned at two ends, each pin ear (3) is corresponding with two pin ears (3) of opposite side and pass through said first gusset (5) connection, and said first gusset (5) favours the length direction and the width setting of said base plate (1).
13. grip-pad according to claim 11, wherein, said base plate (1) is provided with second gusset (6), and this second gusset (6) connects the both sides of said casing (2).
14. grip-pad according to claim 8, wherein, said pin ear (3) has those widened sections (3a) and is connected with said casing (2) with said base plate (1) through this those widened sections (3a).
15. engineering machinery is characterized in that, this project machinery comprises crawler belt, and this crawler belt constitutes by being connected to each other according to any described grip-pad among the claim 7-14.
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| CN104368752A (en) * | 2014-10-27 | 2015-02-25 | 中核苏阀横店机械有限公司 | Method for casting special high-alloy steel track shoe for large mining machinery |
| CN105121686A (en) * | 2013-05-17 | 2015-12-02 | 株式会社小松制作所 | Steel for crawler-type suspension component and crawler link |
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