CN102528265A - Hydraulic engineering composite plate and preparation method for same - Google Patents
Hydraulic engineering composite plate and preparation method for same Download PDFInfo
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Abstract
The invention relates to a hydraulic engineering composite plate and a preparation method for the same. The composite plate comprises a base plate and a compound plate, and is characterized in that the base plate is a structural carbon steel plate or a vessel plate, the compound plate is a niobium nitrogen austenite stainless steel plate, the base plate and the compound plate are combined to form the composite plate through atoms, and the composite plate is mainly used for a sand washing pipe and a gate. The preparation method for the composite plate includes the steps: firstly treating the surfaces of the base plate and the compound plate; explosively welding the treated base plate and the treated compound plate; additionally welding the composite plate after explosive welding; and performing heat treatment for the composite plate after additional welding. The shear strength of the obtained composite plate ranges from 280MPa to 330MPa, and the surface hardness of the obtained composite plate ranges from 275N/mm2 to 285N/mm2.
Description
Technical field
The present invention relates to a kind of hydraulic engineering with composite plate and manufacturing approach thereof, particularly relate to a kind of atom and combine stainless steel clad plate and manufacturing approach thereof.
Background technology
At present, water conservancy project requires case hardness at HB270-290 with stainless steel clad plate, and large hydraulic engineering with the 2205 dual phase steel clad steel plates that adopt more; Need carry out stress-removal heat treatment to it after the explosive welding, but because the inherent characteristic of dual phase steel must be readjusted two-phase proportion at heat treatment temperature 1000-1050 ℃; The back employing water smoke of coming out of the stove cools off; Could guarantee the two-phase proportion of dual phase steel,, cause substrate mechanical properties decrease, surface oxidation serious because clad steel plate time in the stove is long, temperature is high; Inhomogeneous cooling is even can to cause harmful formation mutually in the stainless steel, process cracking.Tradition uses steel to be S31803+Q345B blast composite stainless steel composite plate, and wherein the main component of S31803 is C:0.02%; Si:0.58%; Mn:1.20%; Cr:21.5%; Mo:2.6%; The N:0.12% surplus is iron and unavoidable impurities.
Because S31803 dual phase steel clad steel plate need carry out stress-removal heat treatment to it after the explosive welding, because the inherent characteristic of dual phase steel; Must readjust two-phase proportion at heat treatment temperature 1000-1050 ℃, the water smoke cooling is adopted in the back of coming out of the stove, and could guarantee the two-phase proportion of dual phase steel; Because clad steel plate time in the stove is long, temperature is high; Cause substrate mechanical properties decrease, surface oxidation serious, inhomogeneous cooling is even can be caused and harmfully in the stainless steel forms the process cracking mutually.Therefore demand developing a kind of water conservancy project of high-quality urgently and use stainless steel clad plate.
Summary of the invention
The present invention provides a kind of stainless steel clad plate, and a kind of stainless steel clad plate manufacturing approach that combines through atom also is provided.
The present invention realizes through following technical scheme:
Composite plate is used in a kind of hydraulic engineering, comprises substrate and compound plate, it is characterized in that, substrate is a carbon steel sheet, and compound plate is a corrosion resistant plate, and both combine to form composite plate through atom, and wherein said substrate is structural steel or container panel, and said compound plate is the niobium nitrogen austenitic stainless steel.
Wherein, described substrate, by percentage to the quality, contain following compositions and be:
C :≤0.20%; Preferred 0.18%
Si :≤0.50%; Preferred 0.40%
Mn :≤1.70%; Preferred 1.30%
Nb :≤0.07%; Preferred 0.03%
V :≤0.15%; Preferred 0.12%
Ti :≤0.20%; Preferred 0.15%
Cr :≤0.30%; Preferred 0.23%
N :≤0.012%; Preferred 0.008%
Mo :≤0.10%; Preferred 0.06%
Ni :≤0.50%; Preferred 0.40%
P≤0.035%; Preferred 0.030%
S≤0.035%, preferred 0.030% surplus is iron and unavoidable impurities.
Wherein, described compound plate, by percentage to the quality, contain following compositions and be:
C:0.04-0.12%; Preferred 0.08%
Si:0.50-1.50%; Preferred 1.00%
Mn:2.00-3.00%; Preferred 2.50%
Nb:0.10-0.20%; Preferred 0.15%
Cr:18.00-20.00%; Preferred 18.9%
N:0.15-0.30%; Preferred 0.16%
Ni:7.50-10.50%; Preferred 8.10%
P≤0.055%; Preferably≤0.045%
S≤0.040%, preferred≤0.030% surplus is iron and unavoidable impurities.
A kind of preparation method of composite plate comprises the steps:
(1) surface of substrate and compound plate is handled;
(2) substrate and compound plate after handling are carried out explosive welding;
(3) composite plate after the explosive welding is replenished welding; And
The composite plate of (4) step (3) being replenished after welding is heat-treated.
Wherein, the described processing of described step (1) is polishing, and substrate and compound plate surface roughness value Ra after the preferred polishing are not more than 25 μ m.
Wherein, the used explosive of the described explosive welding of described step (2) is an ammonium nitrate-fuel oil mixture.
Wherein, the explosion velocity of the used explosive of the said explosive welding of described step (2) is 2200m/s-2300m/s, is preferably 2250m/s, and density is 0.60g/cm
3-0.70g/cm
3, preferred density is 0.65g/cm
3
Wherein, when carrying out said step (2), the used explosive of explosive welding is laid on the compound plate, around compound plate, settles the medicine frame to carry out explosive welding.
Wherein, also comprise the length and width of substrate and compound plate coupling in that step (1) is preceding, the length of preferred compound plate with wide respectively than the length and the roomy 90mm ± 10mm of substrate.
Wherein, the cutting circle arc angle of the described additional welding of step (3) is 35-45 °, preferred 40 °.
Wherein, heat treated temperature is 900-930 ℃ in the step (4), is preferably 910 ℃.
Wherein, heat treated temperature retention time is 15-20min in the step (4), is preferably 18min.
Wherein, after step (4), also comprise step (5) to the composite plate polishing, the surface roughness after the preferred polishing is less than 2 μ m, and more preferably 1.4-1.8 μ m also preferably carries out mechanical properties test to composite plate before polishing.
The atom that a kind of above-mentioned preparation method obtains combines composite plate, and shear strength is 280-330MPa, and case hardness is 275-285N/mm
2
The present invention has developed a kind of novel stainless steel clad plate; Through with carbon steel sheet as substrate and niobium nitrogen austenitic compound plate and blast compound after; In 900-930 ℃ of scope, carry out short time stabilisation heat treatment; Air-cooled after coming out of the stove, just can obtain mechanical property height, the uniform austenite stainless steel composite board of case hardness.
Description of drawings
Fig. 1 replenishes the welding sketch map;
1-basic unit wherein, the multiple layer of 2-, 3-transition zone, 4-cutting angle, 5-cutting arc;
The specific embodiment
The present invention provides a kind of hydraulic engineering to use composite plate, through reducing Cr, the Mo content in the compound plate, improves Nb, N content, improves stainless mechanical property, case hardness uniformity and machinability, and raising sand surfing pipe is in the service life of silt erosion.
Hydraulic engineering of the present invention comprises substrate and compound plate with composite plate, and substrate is a carbon steel sheet, and compound plate is a corrosion resistant plate, and both combine to form composite plate through atom.Wherein said carbon steel sheet can be with GB/T1591-2008 in the approaching carbon steel sheet of composition of steel of the Q345 A-D grade stipulated, be preferably Q345B.Wherein said corrosion resistant plate is for containing the Nb stainless steel; Can be to form approaching corrosion resistant plate with the 0Cr19Ni10NbN steel plate of National standard GB/T3280-2007; 0Cr19Ni10NbN steel plate preferably, shear strength is 280-330MPa, case hardness is 275-285N/mm
2
The compound plate 0Cr19Ni10NbN that preferably uses of the present invention wherein; Bigger with the elemental composition difference among the S31803 that uses in the prior art; Contain niobium among the 0Cr19Ni10NbN that particularly the present invention uses; The niobium element has refined crystalline strengthening effect and precipitation strength effect, can bring into play outstanding role aspect intensity that improves steel and the toughness, has the potentiality of development high-performance steel; The nitrogen element is a kind of strong austenite stabilizer element; A spot of nitrogen promptly can reach the effect of stable austenite; Carbon, nitrogen acting in conjunction can increase substantially high nitrogen hardness of steel, and be little to the toughness influence of room temperature, and the anti-local corrosion property of material increases.
The present invention also provides a kind of preparation method of composite plate, comprises the steps:
(1) surface of substrate and compound plate is handled;
(2) substrate and compound plate after handling are carried out explosive welding;
(3) composite plate after the explosive welding is carried out repair welding; And
(4) composite plate in the step (3) is heat-treated.
The described processing of wherein said step (1) is polishing, and substrate after the preferred polishing and compound plate surface roughness value are greater than 25 μ m.Preferably step (1) also comprises the length and width coupling to substrate and compound plate; The length of preferred compound plate with wide be ammonium nitrate-fuel oil mixture than the length and the roomy 90mm ± used explosive of the described explosive welding of 10mm step (2) of substrate respectively; Explosive is laid on the compound plate; Preferably at the disposed about medicine frame of compound plate, the logical peraluminous fulcrum of compound plate and substrate supports.In this preparation method, heat treated temperature is 900-930 ℃ in the step (4), is preferably 910 ℃; Heat treated temperature retention time is 15-20min, is preferably 18min; Carry out air-cooled cooling after the heat treatment.Wherein after step (4), also contain in steps (5) to the composite plate polishing, preferably before polishing, composite plate is carried out mechanical properties test and flaw detection.
Specifically, a kind of preparation method of composite plate comprises the steps:
(1) surface of substrate and compound plate is handled; Remove oxide and foreign material on substrate and the compound plate blast faying face, after the polishing, the faying face surface roughness value of substrate is not more than Ra25 μ m;
(2) substrate and compound plate after handling are carried out explosive welding; Wherein, the condition of explosive welding does, compound plate and substrate support through cylindrical aluminium matter fulcrum during explosive welding, and at the disposed about medicine frame of compound plate, explosive is laid on the compound plate, and explosion velocity of explosive is controlled between 2200m/s～2300m/s, and density is 0.6g/cm
3～0.7g/cm
3Low-detonation velocity anfo explosive, electric cap is ignited.
(3) composite plate after the explosive welding is carried out repair welding; The repair welding mode is built-up welding, and ultrasound examination (UT) is carried out in the welding position in the back and penetrant inspection detects (PT).
(4) composite plate in the step (3) is heat-treated; Heat treatment temperature is 900-930 ℃, is preferably 910 ℃; Heat treated temperature retention time is 15-20min, is preferably 18min.
Wherein in the step (3) composite plate after the explosive welding is carried out repair welding; The repair welding mode is built-up welding, during repair welding, will not have the compound plate excision of explosive welding; It is replenished welding; When wherein excising compound plate, maximum thickness of cutting adds half the (transition region thickness half the be 0.5-1mm) of transition region thickness for compound plate thickness, to have cut transition zone; It is best just being cut to substrate, and ultrasound examination (UT) is carried out in the welding position in the back and penetrant inspection detects (PT).
Preferably after step (4), carry out Performance Detection; Carry out surface finish after the detection; Wherein Performance Detection comprises 100% Non-Destructive Testing; Through 100% harmless ultrasonic examination detection flawless and pore-free is that qualified products carry out surface finish, and substandard product returns and carries out repair welding in the preparation process, till qualified.Wherein said mechanical property parameters detects the composite plate that is meant exploding after compound, measures yield strength, tensile strength, percentage elongation and the shear strength of substrate, measures the hardness and the wear rate of compound plate; As the mechanical property parameters characteristic that characterizes composite plate.
More preferably, a kind of water conservancy project is with the manufacturing approach of stainless compound steel plate, and it to the requirement of compound plate and substrate is: substrate is the carbon steel sheet Q345B among standard GB/T1591-2008, and compound plate is the 0Cr19Ni10NbN stainless steel among the GB/T 3280-2007;
Hydraulic engineering comprises following main step with the processing of stainless compound steel plate:
1, coupling
With the high N stainless steel compound plate and the Q345B substrate of check National standard and operation technique requirement, make the length and wide length and roomy 90mm ± 10mm of containing of selection of high N stainless steel compound plate than substrate;
2, ground surface
Remove oxide and foreign material on substrate and the compound plate blast faying face, after the polishing, the faying face surface roughness value of substrate is not more than Ra 25 μ m;
3, explosive welding
Compound plate and substrate support through cylindrical aluminium matter fulcrum during explosive welding, and at the disposed about medicine frame of compound plate, explosive is laid on the compound plate, and explosion velocity of explosive is controlled between 2200m/s～2300m/s, and density is 0.6g/cm
3～0.7g/cm
3Low-detonation velocity anfo explosive, electric cap is ignited.
4, surperficial repair welding
It is E2209 that type of electrode is adopted in the welding of multiple layer and transition zone, after the built-up welding, UT and PT detection is carried out in the welding position.
5, heat treatment
Adopt high-temperature heat treatment, at 900-930 ℃ of insulation 15-20min, the back of coming out of the stove is air-cooled;
6, Performance Detection
Requirement according to GB/T 6396-2008 is carried out mechanical properties test to clad steel plate.
7, ultrasonic examination
Requirement according to NB/T 47002-2009 is carried out 100% flaw detection to composite plate.
8, clad steel plate surface finish
120 order fused alumina zirconia sand paper are adopted in polishing, and surface roughness is not more than Ra 2 μ m;
Embodiment
The concrete composition and the content of the various raw materials that use among the following embodiment of the present invention are following:
The mensuration of surface roughness adopts TR210 hand-held roughmeter, Beijing Time Zhifeng Science Co., Ltd's system
Wear rate: adopt abrasion tester, on abrasion tester, through 10 hours wear testings, the wear rate that obtains.The model of abrasion tester is MMW-1, finishes into measuring technology Co., Ltd system by Jinan.。
Stainless steel hardness: adopting model is the Brinell hardness tester of HB-3000B, Beijing epoch mountain peak Science and Technology Ltd. system
Yield strength, tensile strength, percentage elongation, shear strength Mechanics Performance Testing: test according to the GB/T6396-2008 standard-required.
Ultrasonic wave 100% carrying out flaw detection: carry out ultrasonic examination according to the method according to JB4730.3-2005 appendix B of the standard-required of NB/T 47002-2009 and test.
1, coupling
With check meet standard GB/T1591-2008 as substrate, by percentage to the quality, contain following compositions and be: C:0.17%; Si:0.45%; Mn:1.50%; Nb:0.02%; V:0.13%; Ti:0.18%; Cr:0.26%; N:0.009%; Mo:0.09%; Ni:0.45%; P≤0.030%; S≤0.030%; Surplus is iron and unavoidable impurities;
The compound plate that will meet the GB3280-2007 standard by percentage to the quality, contains following compositions and is: C:0.09%; Si:1.20%; Mn:2.60%; Nb:0.18%; Cr:19.3%; N:0.24%; Ni:8.50%; P≤0.035%; S≤0.035% surplus is iron and unavoidable impurities
Both length-width ratios is right, the long 10050mm of substrate wherein, wide 1500mm, thick 26mm, the long 10150mm of compound plate, wide 1580mm, thick 4mm, wherein the length of compound plate is than the 100mm that grows up of substrate; The wide roomy 80mm of compound plate than substrate;
2, ground surface
Remove oxide and foreign material on substrate and the compound plate blast faying face, after the polishing, the faying face surface roughness value Ra that measures substrate is 20 μ m;
3, explosive welding
Above-mentioned compound plate and substrate are supported through cylindrical aluminium matter fulcrum, and explosive is laid on the compound plate, and at the disposed about medicine frame of compound plate, explosion velocity of explosive is controlled to be 2250m/s, and density is 0.65g/cm
3Low-detonation velocity anfo explosive, electric cap is ignited, and carries out explosive welding and processes composite plate.
4, surperficial repair welding
Multiple layer and transition zone to composite plate after the explosive welding replenish welding, and the multiple layer that earlier explosive welding is not combined removes, and is as shown in Figure 1; The degree of depth of cutting is 4.3mm, and the cutting angle of cutting arc is 40 °, and it is E2209 that type of electrode is adopted in the back; Carry out built-up welding, concrete parameter is seen table 1, and the back is carried out UT to the welding position according to the method for JB4730.3-2005 appendix B and detected; Carry out PT according to the method for JB4730.5-2005 standard and detect, flawless and pore-free are qualified;
Table 1
| The welding position | Transition zone | Multiple layer |
| Core diameter (mm) | 3.2 | 3.2 |
| Welding current (A) | 100-110 | 110-125 |
5, heat treatment
Adopt high-temperature heat treatment, at 910 ℃ of insulation 18min, the back of coming out of the stove is air-cooled;
6, the composite plate after air-cooled being carried out ultrasonic examination according to the method for JB4730.3-2005 appendix B detects; After testing result is flawless and pore-free; Carry out performance test, The performance test results is shown in Table 2, after polish; Adopt the polishing of 120 order fused alumina zirconia sand paper, surface of polished roughness Ra is 1.6 μ m.
1, coupling
With check meet standard GB/T1591-2008 as substrate, by percentage to the quality, contain following compositions and be: C:0.14%; Si:0.35%; Mn:1.00%; Nb:0.01%; V:0.11%; Ti:0.13%; Cr:0.18%; N:0.006%; Mo:0.04%; Ni:0.35%; P≤0.025%; S≤0.025%; Surplus is iron and unavoidable impurities;
The compound plate that will meet the GB3280-2007 standard by percentage to the quality, contains following compositions and is: C:0.12%; Si:1.50%; Mn:3.00%; Nb:0.20%; Cr:20.0%; N:0.30%; Ni:10.50%; P≤0.055%; S≤0.040% surplus is iron and unavoidable impurities
Both length-width ratios is right, the long 10050mm of substrate wherein, wide 1500mm, thick 26mm, the long 10140mm of compound plate, wide 1590mm, thick 4mm, wherein the length of compound plate is than the 90mm that grows up of substrate; The wide roomy 90mm of compound plate than substrate;
2, ground surface
Remove oxide and foreign material on substrate and the compound plate blast faying face, after the polishing, the faying face surface roughness value Ra that measures substrate is 22 μ m;
3, explosive welding
Above-mentioned compound plate and substrate are supported through cylindrical aluminium matter fulcrum, and explosive is laid on the compound plate, and at the disposed about medicine frame of compound plate, explosion velocity of explosive is controlled to be 2200m/s, and density is 0.6g/cm
3Low-detonation velocity anfo explosive, electric cap is ignited, and carries out explosive welding and processes composite plate.
4, surperficial repair welding
Multiple layer and transition zone to composite plate after the explosive welding weld, and the multiple layer that earlier explosive welding is not combined removes, and the degree of depth of cutting is 4.5mm; Cutting angle is 35 °; The employing type of electrode is E2209, carries out built-up welding, after the concrete parameter of built-up welding is seen table 1; The welding position is carried out UT and carried out the PT detection according to the method for JB4730.5-2005 standard according to the method for JB4730.3-2005 appendix B, and flawless and pore-free are qualified.
5, heat treatment
Adopt high-temperature heat treatment, at 900 ℃ of insulation 20min, the back of coming out of the stove is air-cooled;
6, the composite plate after air-cooled being carried out ultrasonic examination according to the method for JB4730.3-2005 appendix B detects; After testing result is flawless and pore-free; Carry out performance test, The performance test results is shown in Table 2, after polish; Adopt the polishing of 120 order fused alumina zirconia sand paper, surface of polished roughness Ra is 1.4 μ m.
1, coupling
With check meet standard GB/T1591-2008 as substrate, by percentage to the quality, contain following compositions and be: C:0.20%; Si:0.50%; Mn:1.70%; Nb:0.07%; V:0.15%; Ti:0.20%; Cr:0.30%; N:0.012%; Mo:0.10%; Ni:0.40%; P≤0.035%; S≤0.035%; Surplus is iron and unavoidable impurities;
The compound plate that will meet the GB3280-2007 standard by percentage to the quality, contains following compositions and is: C:0.04%; Si:0.50%; Mn:2.00%; Nb:0.10%; Cr:18.0%; N:0.15%; Ni:7.50%; P≤0.055%; S≤0.040% surplus is iron and unavoidable impurities
Both length-width ratios is right, the long 10050mm of substrate wherein, wide 1500mm, thick 26mm, the long 10130mm of compound plate, wide 1600mm, thick 4mm, wherein the length of compound plate is than the 80mm that grows up of substrate; The wide roomy 100mm of compound plate than substrate;
2, ground surface
Remove oxide and foreign material on substrate and the compound plate blast faying face, after the polishing, the faying face surface roughness value Ra that measures substrate is 25 μ m;
3, explosive welding
Above-mentioned compound plate and substrate are supported through cylindrical aluminium matter fulcrum, and explosive is laid on the compound plate, and at the disposed about medicine frame of compound plate, explosion velocity of explosive is controlled to be 2300m/s, and density is 0.7g/cm
3Low-detonation velocity anfo explosive, electric cap is ignited, and carries out explosive welding and processes composite plate.
4, surperficial repair welding
Multiple layer and transition zone to composite plate after the explosive welding weld, and the multiple layer that earlier explosive welding is not combined removes, and the degree of depth of cutting is 4.2mm; Cutting angle is 45 °; The employing type of electrode is E2209, carries out built-up welding, after the concrete parameter of built-up welding is seen table 1; The welding position is carried out UT and carried out the PT detection according to the method for JB4730.5-2005 standard according to the method for JB4730.3-2005 appendix B, and flawless and pore-free are qualified;
5, heat treatment
Adopt high-temperature heat treatment, at 920 ℃ of insulation 15min, the back of coming out of the stove is air-cooled;
6, the composite plate after air-cooled being carried out ultrasonic examination according to the method for JB4730.3-2005 appendix B detects; After testing result is flawless and pore-free; Carry out performance test, The performance test results is shown in Table 2, after polish; Adopt the polishing of 120 order fused alumina zirconia sand paper, surface of polished roughness Ra is 1.8 μ m.
1, coupling
With check meet standard GB/T1591-2008 as substrate, by percentage to the quality, contain following compositions and be: C:0.18%; Si:0.40%; Mn:1.30%; Nb:0.03%; V:0.12%; Ti:0.15%; Cr:0.23%; N:0.008%; Mo:0.06%; Ni:0.40%; P≤0.030%; S≤0.030%; Surplus is iron and unavoidable impurities;
The compound plate that will meet the GB3280-2007 standard by percentage to the quality, contains following compositions and is: C:0.08%; Si:1.00%; Mn:2.50%; Nb:0.15%; Cr:18.9%; N:0.16%; Ni:8.10%; P≤0.045%; S≤0.030% surplus is iron and unavoidable impurities
Both length-width ratios is right, the long 10050mm of substrate, wide 1500mm, thick 26mm, the long 10150mm of compound plate, wide 1580mm, thick 4mm, the length of compound plate is than the 100mm that grows up of substrate; The wide roomy 80mm of compound plate than substrate;
2, ground surface
Remove oxide and foreign material on substrate and the compound plate blast faying face, after the polishing, the faying face surface roughness value Ra that measures substrate is 20 μ m;
3, explosive welding
Compound plate and substrate support through cylindrical aluminium matter fulcrum during explosive welding, and explosive is laid on the compound plate, and at the disposed about medicine frame of compound plate, explosion velocity of explosive is controlled to be 2250m/s, and density is 0.65g/cm
3Low-detonation velocity anfo explosive, electric cap is ignited.
4, surperficial repair welding
Multiple layer and transition zone to composite plate after the explosive welding weld, and the multiple layer that earlier explosive welding is not combined removes, and the degree of depth of cutting is 4.4mm; Cutting angle is 40 °, and the employing type of electrode is E2209, carries out built-up welding; After the concrete parameter of built-up welding is seen table 1; UT is carried out according to the method for JB4730.3-2005 appendix B in the welding position detect, carry out PT according to the method for JB4730.5-2005 standard and detect, flawless and pore-free are qualified;
5, heat treatment
Adopt high-temperature heat treatment, at 930 ℃ of insulation 20min, the back of coming out of the stove is air-cooled;
6, the composite plate after air-cooled being carried out ultrasonic examination according to the method for JB4730.3-2005 appendix B detects; After testing result is flawless and pore-free; Carry out performance test, The performance test results is shown in Table 2, after polish; Adopt the polishing of 120 order fused alumina zirconia sand paper, surface of polished roughness Ra is 1.6 μ m.
According to the method for GB/T6396-2008 to the resulting composite plate of the foregoing description 1-4 polishing advance row carry out performance test and with technology in the past in the compound S31803 of 26mm substrate commonly used and 4mm compound plate and the Q345B compound composite plate of exploding compare; Wherein, The method of wear testing is: on abrasion tester; Through 10 hours wear testings, the wear rate that obtains; The mensuration of hardness adopts Brinell hardness tester to measure, and each item result of mensuration sees table 2.
Table 2 The performance test results
Can find out by table 2; The composite plate that the foregoing description 1-4 prepares is carried out the ultrasonic inspection detection before polishing all do not have crackle and pore; All reach the requirement of hydraulic engineering at each item mechanical property parameters with composite plate; In the mensuration result of wear rate, embodiment of the invention 1-4 obtains the composite plate that composite plate passes by to use always and all descends, and composite plate that this proof embodiment of the invention prepares meets hydraulic engineering and uses composite plate.Wherein embodiment 1 and 4 prepared composite plates want high than embodiment 2 and 3 on mechanical property parameters.
It will be appreciated by those skilled in the art that the present invention except specifically described mode, can also be applicable to distortion and modification.Should be understood that, the present invention includes all these distortion and modification.Further, title, title or similar part are in order to strengthen the understanding of reader to this paper, should not regarded as the qualification to the scope of the invention.
Make a general survey of whole specification and claims, only if context needs, otherwise word " comprises ", and " comprising " and similar speech are interpreted as the implication that comprises but not the implication of getting rid of that is to say that looking like is " including, but are not limited to ".
Claims (14)
1. composite plate is used in a hydraulic engineering, comprises substrate and compound plate, it is characterized in that; Substrate is a carbon steel sheet, and compound plate is a corrosion resistant plate, and both combine to form composite plate through atom; Wherein said substrate is structural steel or container panel, and said compound plate is the niobium nitrogen austenitic stainless steel.
2. composite plate as claimed in claim 1, wherein said substrate, by percentage to the quality, contain following compositions and be:
C :≤0.20%; Preferred 0.18%
Si :≤0.50%; Preferred 0.40%
Mn :≤1.70%; Preferred 1.30%
Nb :≤0.07%; Preferred 0.03%
V :≤0.15%; Preferred 0.12%
Ti :≤0.20%; Preferred 0.15%
Cr :≤0.30%; Preferred 0.23%
N :≤0.012%; Preferred 0.008%
Mo :≤0.10%; Preferred 0.06%
Ni :≤0.50%; Preferred 0.40%
P≤0.035%; Preferred 0.030%
S≤0.035%, preferred 0.030% surplus is iron and unavoidable impurities.
3. according to claim 1 or claim 2 composite plate, wherein said compound plate, by percentage to the quality, contain following compositions and be:
C:0.04-0.12%; Preferred 0.08%
Si:0.50-1.50%; Preferred 1.00%
Mn:2.00-3.00%; Preferred 2.50%
Nb:0.10-0.20%; Preferred 0.15%
Cr:18.00-20.00%; Preferred 18.9%
N:0.15-0.30%; Preferred 0.16%
Ni:7.50-10.50%; Preferred 8.10%
P≤0.055%; Preferably≤0.045%
S≤0.040%, preferred≤0.030% surplus is iron and unavoidable impurities.
4. the preparation method of each said composite plate of claim 1-3 comprises the steps:
(1) surface of substrate and compound plate is handled;
(2) substrate and compound plate after handling are carried out explosive welding;
(3) composite plate after the explosive welding is replenished welding; And
The composite plate of (4) step (3) being replenished after welding is heat-treated.
5. preparation method as claimed in claim 4, wherein the described processing of step (1) is polishing, substrate and compound plate surface roughness value Ra after the preferred polishing are not more than 25 μ m.
6. like claim 4 or 5 described preparation methods, wherein the used explosive of the described explosive welding of step (2) is an ammonium nitrate-fuel oil mixture.
7. like each described preparation method of claim 4-6, wherein the explosion velocity of the used explosive of the said explosive welding of step (2) is 2200m/s-2300m/s, is preferably 2250m/s, and density is 0.60g/cm
3-0.70g/cm
3, preferred density is 0.65g/cm
3
8. like each described preparation method of claim 4-7, when wherein carrying out said step (2), the used explosive of explosive welding is laid on the compound plate, around compound plate, settles the medicine frame to carry out explosive welding.
9. like each described preparation method of claim 4-8, wherein in the preceding length and width coupling that also comprises substrate and compound plate of step (1), the length of preferred compound plate with wide respectively than the length and the roomy 90mm ± 10mm of substrate.
10. like each described preparation method of claim 4-9, wherein the cutting circle arc angle of the described additional welding of step (3) is 35-45 °, preferred 40 °.
11. like each described preparation method of claim 4-10, wherein heat treated temperature is 900-930 ℃ in the step (4), is preferably 910 ℃.
12. like each described preparation method of claim 4-11, wherein heat treated temperature retention time is 15-20min in the step (4), is preferably 18min.
13. like each described preparation method of claim 4-12; Wherein after step (4), also comprising step (5) polishes composite plate; Surface roughness after the preferred polishing is less than 2 μ m, and more preferably 1.4-1.8 μ m also preferably carries out mechanical properties test to composite plate before polishing.
14. like each said composite plate of claim 1～3, shear strength is 280-330MPa, case hardness is 275-285N/mm
2
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