CN105057353A - Rolling method for explosive cladding titanium-steel-titanium double-faced composite board - Google Patents
Rolling method for explosive cladding titanium-steel-titanium double-faced composite board Download PDFInfo
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Abstract
The invention discloses a rolling method for an explosive cladding titanium-steel-titanium double-faced composite board. The rolling method includes the following steps that firstly, a blank is manufactured; secondly, the blank is checked and accepted; thirdly, a rolling technology is conducted; fourthly, cooling is conducted; fifthly, flaw detection is conducted; sixthly, cutting and sampling are conducted; seventhly, marking and checking are conducted; and eighthly, warehousing is conducted. According to the rolling method for the explosive cladding titanium-steel-titanium double-faced composite board, the double-faced composite board blank with large residual stress after explosive welding is sufficiently heated in a walking beam type heating furnace through a low temperature preheating mode and a medium and low temperature heating mode, the heating cost is low, and the pollution to the environment is small; and the technical purposes that the double-faced composite board high in combination strength can be rolled with a 2.5-time low compression ratio and with the online straightening temperature controlled to be 400-450 DEG C, offline straightening is not needed, and the flaw detection grade of the combined parts of upper and lower titanium composite boards and a steel plate base plate reaches the JB730-2005 I level are achieved.
Description
Technical field
The present invention relates to a kind of milling method of titanium-steel-titanium double-sided composite plate of Explosion composite, be specifically related to a kind of titanium compound plate, steel substrate, titanium compound plate are directly rolled into double-sided composite plate by low compression ratio milling method through the double-sided composite plate blanks that explosive welding (EW) is formed, belong to technical field of composite materials.
Background technology
Titanium is a kind of transition metal, has that density is low, excellent in low temperature toughness, corrosion resistance outstanding advantages, but makes it apply to be very limited due to expensive.For reducing use cost, usually be made into titanium-steel composite board, titanium-steel composite material has the high strength of steel and the anti-corrosion combination property of excellence of titanium and distinct economic with it and is widely used in the stronger industrial part of the corrosivity such as chemical industry, oil, ocean.
Current titanium-steel composite board production method mainly contains Explosion composite, explode a Rolling compund, Rolling compund etc.Explosion composite utilizes explosive to make the energy, belongs to explosive welding, although its composite effect is relatively good, but in operation and security, there is disadvantage, and the composite plate of explosive welding (EW), because of larger by explosion time shock wave, in composite plate, residual stress is comparatively large, causes follow-up leveling very difficult; That Recent study is more is Processed by Accumulative Roll-bonding (ARB), and it belongs to the one in Rolling compund, is the effective ways obtaining larger cumulative deformation.The method has increased substantially binding ability, but in actual production, need lamination repeatedly, and operate more numerous, the stitch welding cycle is long, complex manufacturing.Through By consulting literatures, do not need heat treatment by the double-sided composite plate blanks after low-temperature heat Direct Rolling explosive welding (EW), titanium-steel-titanium double-sided composite plate milling method that mechanical property and production board shape meet standard-required not yet has research.
Retrieval finds, publication number is: the preparation method that patent discloses a kind of blast-rolling large area titanium steel composite board of CN102225510A, describing titanium plate and steel plate joint weld technology, introduce the milling method of composite plate blanks, is that one rolls front cladding titanium plate welding manufacturing technology.
Publication number is: CN101428389A patent discloses a kind of method of manufacturing thin titanium/steel composite board, describes titanium plate and steel plate and is formed after titanium/steel composite board through Explosion composite, more superimposed and assembly welding forms through rolling after becoming rolling blank again by two pieces of composite plates.The method is that two pieces of composite plate blanks need be aligned by rolling blank used again, heat treatment, assembly welding, rolling, production process is complicated, and cost increases.
Consider that the bond strength of composite plate produce difficult point mainly after substrate and the direct explosive welding (EW) of compound plate is low, and plate shape is not straight, and requires that production cost is lower.
Summary of the invention
The object of the invention is to: for above-mentioned prior art Problems existing, a kind of milling method of titanium-steel-titanium double-sided composite plate of Explosion composite is proposed, the composite billet that the present invention adopts Explosion composite to be formed, by the rolling process that 2.5 times of low compression are when optimum, produce flaw detection grade and reach JB4730-2005 I grade of composite plate, do not need heat treatment just can reach plate shape good, the double-sided composite plate of stable mechanical property, production cost is low, and security is high, and method is simple.
The technical problem of the present invention's solution used: the milling method that a kind of titanium-steel-titanium double-sided composite plate of Explosion composite is provided, by the double-sided composite plate blanks formed after titanium plate compound plate+substrate steel sheet+titanium plate compound plate explosive welding (EW), do not need heat treatment, by the low compression ratio of 2.5 times, rational rolling mill practice is coordinated to produce the titanium-steel-titanium double-sided composite plate of thickness 14.4mm thickness, unevenness plate shape reaches≤5mm/1m, and As rolled mechanical property reaches requirement, shear strength > 140MPa, yield strength > 235MPa, tensile strength > 460MPa, 0 DEG C of ballistic work, 80J.The inventive method successfully solves titanium-steel-titanium blast double-sided composite plate blanks just can roll out the technological difficulties such as the double-sided composite plate of high bond strength by 2.5 times of low compression ratios.
In order to reach above object, technical scheme is as follows: the milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite of the present invention, is characterized in that: comprise the steps:
Step one: make blank:
Adopt titanium plate compound plate, substrate steel sheet and titanium plate compound plate, after three's explosive welding (EW), form titanium-steel-titanium double-sided composite plate blanks;
Step 2: blank is checked and accepted:
Carry out an acceptance inspection to titanium-steel-titanium double-sided composite plate blanks, blank acceptance criteria requires that distance edge 5-10mm must not have obvious breakage, crackle, stick up skin and qua-lity defect; Blank unevenness is maximum must not more than 12mm/1m;
Step 3: rolling mill practice:
First stage: the titanium-steel-titanium double-sided composite plate blanks of acceptance(check) is put into stove and heats, preheating section temperature 100-600 DEG C in stove, heating-up temperature is 820-900 DEG C, and time inside furnace is 135-150 minute;
Second stage: be rolled by the titanium-steel-titanium double-sided composite plate blanks after heating, start rolling temperature is 780-1150 DEG C, target finishing temperature 750-1000 DEG C, and rolling reduction is 2.5 times;
Phase III: the titanium-steel-titanium double-sided composite plate blanks after rolling is carried out on-line straightening, on-line straightening temperature, at 400-450 DEG C, obtains titanium-steel-titanium double-sided composite plate after on-line straightening;
Step 4: cooling:
Symmetry cooling is carried out to titanium-steel-titanium double-sided composite plate, guarantees that the cooling of upper and lower cladding is consistent;
Step 5: flaw detection:
Adopt automatic ultrasonic inspection instrument to require to detect a flaw according to JB4730-2005 to cooled titanium-steel-titanium double-sided composite plate, result display flaw detection grade reaches I grade, and to be flaw detection qualified;
Step 6: cutting, sampling:
Titanium-steel-titanium double-sided composite plate employing plasma cut the instrument qualified to flaw detection carries out the correspondingly-sized required by precise cutting one-tenth, and samples according to standard-required, send physics and chemistry to carry out mechanical property test;
Step 7: head-stamp, inspection:
Lattice automatic print-marking machine in Manama is adopted to carry out the information required by head-stamp one-tenth to surface of steel plate to the titanium-steel cut-titanium double-sided composite plate, and the length of steel plate, width, thickness, sign content and surface quality are terminated to head-stamp test, obtain final finished;
Step 8: warehouse-in:
Final finished is put into the goods yard of waiting for delivery.
In described step one, described titanium plate compound plate take TA1 as plied timber, thickness is 3mm, described substrate steel sheet adopts Q235B steel, all polishing pretreatment is carried out to the upper surface of substrate steel sheet and the lower surface of titanium plate compound plate, then is coated with up-protective layer at the upper surface of titanium base board, be evenly arranged TNT explosive on the protection layer, the instantaneous high-temperature produced by explosion time after ignition, shock wave are by titanium plate compound plate together with substrate steel sheet seam, and so far namely upper table compound completes; Stood up by the one side composite plate blanks of compound one deck, again carry out compound to following table, composite steps is the same with upper table compound, completes double-sided composite plate blanks immediately.
In described step one, the thickness of described titanium plate compound plate is 3mm, and the thickness of described substrate steel sheet is 30mm.
In described step 3, the titanium-steel after described rolling-titanium double-sided composite plate thickness is 14.4mm, and wherein the thickness of titanium plate compound plate is 1.2mm, and the thickness of substrate steel sheet is 12mm.
In described step 3, described titanium-steel-titanium double-sided composite plate blanks produces the titanium-steel-titanium double-sided composite plate blanks obtaining low compression ratio through 2800mm production line four roller two-stand mills.
In described step 4, ultrafast refrigeration technique of new generation is adopted to carry out symmetry cooling to titanium-steel-titanium double-sided composite plate.
Beneficial effect of the present invention is: (1), by low-temperature prewarming, middle low-temperature heat pattern, the double-sided composite plate blanks that after solving explosive welding (EW), residual stress is larger is heated fully in walking beam heating furnace, and heating cost is low, and environmental pollution is little; (2) this method adopts rational controlled rolling process production thickness to reach the double-sided composite plate of the high bond strength of 14.4mm Thin Specs, the each mechanical performance index of As rolled all reaches GB/T8547-2006 standard-required, shear strength > 140MPa, yield strength > 235MPa, tensile strength > 460MPa, 0 DEG C of ballistic work, 80J; (3) the method successfully solve titanium-steel-titanium blast double-sided composite plate blanks by 2.5 times of low compression ratios, on-line straightening temperature control 400-450 DEG C just can roll out the double-sided composite plate of high bond strength and do not need off-line to align, the flaw detection grade of upper and lower titanium plate and middle Q235B substrate junction reaches the technological difficulties such as JB4730-2005 I grade of level.
The double-sided composite plate blanks that the present invention forms the Q235B substrate+3mm thickness of the titanium plate compound plate+30mm thickness of 3mm thickness titanium plate compound plate by explosive welding is combined into, do not need off-line leveling, the operations such as heat treatment directly produce 2.5 times of low compression ratios and thickness is the double-sided composite plate of 14.4mm (1.2mm thickness compound plate+12mm thick substrate+1.2mm thickness compound plate) through 2800mm production line four roller two-stand mills, heat treatment is not needed after rolling, As rolled plate shape unevenness can reach≤5mm/1m, mechanical property reaches standard-required, and the flaw detection grade of the junction of titanium plate compound plate and substrate steel sheet reaches JB4730-2005 I grade of level up and down, it is low that production method has cost, the advantage that technological process is short, power consumption can be met preferably low, anticorrosive strong component materials demand.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is titanium-steel mixed binding place scanning organization chart.
Fig. 2 is titanium-steel compound boundary line periphery energy spectrum analysis figure.
Detailed description of the invention
Embodiment one
The milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite of the present invention, is characterized in that: comprise the steps:
Step one: make blank:
Adopt titanium plate compound plate, substrate steel sheet and titanium plate compound plate, after three's explosive welding (EW), form titanium-steel-titanium double-sided composite plate blanks; In described step one, described titanium plate compound plate take TA1 as plied timber, thickness is 3mm, described substrate steel sheet adopts Q235B steel, all polishing pretreatment is carried out to the upper surface of substrate steel sheet and the lower surface of titanium plate compound plate, then is coated with up-protective layer at the upper surface of titanium base board, be evenly arranged TNT explosive on the protection layer, the instantaneous high-temperature produced by explosion time after ignition, shock wave are by titanium plate compound plate together with substrate steel sheet seam, and so far namely upper table compound completes; Stood up by the one side composite plate blanks of compound one deck, again carry out compound to following table, composite steps is the same with upper table compound, completes double-sided composite plate blanks immediately.In described step one, the thickness of described titanium plate compound plate is 3mm, and the thickness of described substrate steel sheet is 30mm;
Step 2: blank is checked and accepted:
Carry out an acceptance inspection to titanium-steel-titanium double-sided composite plate blanks, blank acceptance criteria requires distance edge 5mm, must not have obvious breakage, crackle, stick up skin and qua-lity defect; Blank unevenness is maximum must not more than 12mm/1m;
Step 3: rolling mill practice:
First stage: the titanium-steel-titanium double-sided composite plate blanks of acceptance(check) is put into stove and heats, preheating section temperature 100 DEG C in stove, heating-up temperature is 820 DEG C, and time inside furnace is 135 minutes;
Second stage: be rolled by the titanium-steel-titanium double-sided composite plate blanks after heating, start rolling temperature is 780 DEG C, target finishing temperature 750 DEG C, and rolling reduction is 2.5 times;
Phase III: the titanium-steel-titanium double-sided composite plate blanks after rolling is carried out on-line straightening, on-line straightening temperature, at 400 DEG C, obtains titanium-steel-titanium double-sided composite plate after on-line straightening;
In described step 3, the titanium-steel after described rolling-titanium double-sided composite plate thickness is 14.4mm, and wherein the thickness of titanium plate compound plate is 1.2mm, and the thickness of substrate steel sheet is 12mm.
In described step 3, described titanium-steel-titanium double-sided composite plate blanks produces the titanium-steel-titanium double-sided composite plate blanks obtaining low compression ratio through 2800mm production line four roller two-stand mills.
Step 4: cooling:
Adopt ultrafast refrigeration technique of new generation to carry out symmetry cooling to titanium-steel-titanium double-sided composite plate, guarantee that the cooling of upper and lower cladding is consistent;
Step 5: flaw detection:
Adopt automatic ultrasonic inspection instrument to require to detect a flaw according to JB4730-2005 to cooled titanium-steel-titanium double-sided composite plate, result display flaw detection grade reaches I grade, and to be flaw detection qualified;
Step 6: cutting, sampling:
Titanium-steel-titanium double-sided composite plate employing plasma cut the instrument qualified to flaw detection carries out the correspondingly-sized required by precise cutting one-tenth, and samples according to standard-required, send physics and chemistry to carry out mechanical property test;
Step 7: head-stamp, inspection:
Lattice automatic print-marking machine in Manama is adopted to carry out the information required by head-stamp one-tenth to surface of steel plate to the titanium-steel cut-titanium double-sided composite plate, and the length of steel plate, width, thickness, sign content and surface quality are terminated to head-stamp test, obtain final finished;
Step 8: warehouse-in:
Final finished is put into the goods yard of waiting for delivery.
Embodiment two
The milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite of the present invention, is characterized in that: comprise the steps:
Step one: make blank:
Adopt titanium plate compound plate, substrate steel sheet and titanium plate compound plate, after three's explosive welding (EW), form titanium-steel-titanium double-sided composite plate blanks; In described step one, described titanium plate compound plate take TA1 as plied timber, thickness is 3mm, described substrate steel sheet adopts Q235B steel, all polishing pretreatment is carried out to the upper surface of substrate steel sheet and the lower surface of titanium plate compound plate, then is coated with up-protective layer at the upper surface of titanium base board, be evenly arranged TNT explosive on the protection layer, the instantaneous high-temperature produced by explosion time after ignition, shock wave are by titanium plate compound plate together with substrate steel sheet seam, and so far namely upper table compound completes; Stood up by the one side composite plate blanks of compound one deck, again carry out compound to following table, composite steps is the same with upper table compound, completes double-sided composite plate blanks immediately.In described step one, the thickness of described titanium plate compound plate is 3mm, and the thickness of described substrate steel sheet is 30mm;
Step 2: blank is checked and accepted:
Carry out an acceptance inspection to titanium-steel-titanium double-sided composite plate blanks, blank acceptance criteria requires that distance edge 5-10mm must not have obvious breakage, crackle, stick up skin and qua-lity defect; Blank unevenness is maximum must not more than 12mm/1m;
Step 3: rolling mill practice:
First stage: the titanium-steel-titanium double-sided composite plate blanks of acceptance(check) is put into stove and heats, preheating section temperature 550 DEG C in stove, heating-up temperature is 875 DEG C, and time inside furnace is 147 minutes;
Second stage: be rolled by the titanium-steel-titanium double-sided composite plate blanks after heating, start rolling temperature is 800 DEG C, target finishing temperature 767 DEG C, and rolling reduction is 2.5 times;
Phase III: the titanium-steel-titanium double-sided composite plate blanks after rolling is carried out on-line straightening, on-line straightening temperature, at 437 DEG C, obtains titanium-steel-titanium double-sided composite plate after on-line straightening;
In described step 3, the titanium-steel after described rolling-titanium double-sided composite plate thickness is 14.4mm, and wherein the thickness of titanium plate compound plate is 1.2mm, and the thickness of substrate steel sheet is 12mm.
In described step 3, described titanium-steel-titanium double-sided composite plate blanks produces the titanium-steel-titanium double-sided composite plate blanks obtaining low compression ratio through 2800mm production line four roller two-stand mills.
Step 4: cooling:
Adopt ultrafast refrigeration technique of new generation to carry out symmetry cooling to titanium-steel-titanium double-sided composite plate, guarantee that the cooling of upper and lower cladding is consistent;
Step 5: flaw detection:
Adopt automatic ultrasonic inspection instrument to require to detect a flaw according to JB4730-2005 to cooled titanium-steel-titanium double-sided composite plate, result display flaw detection grade reaches I grade, and to be flaw detection qualified;
Step 6: cutting, sampling:
Titanium-steel-titanium double-sided composite plate employing plasma cut the instrument qualified to flaw detection carries out the correspondingly-sized required by precise cutting one-tenth, and samples according to standard-required, send physics and chemistry to carry out mechanical property test;
Step 7: head-stamp, inspection:
Lattice automatic print-marking machine in Manama is adopted to carry out the information required by head-stamp one-tenth to surface of steel plate to the titanium-steel cut-titanium double-sided composite plate, and the length of steel plate, width, thickness, sign content and surface quality are terminated to head-stamp test, obtain final finished;
Step 8: warehouse-in:
Final finished is put into the goods yard of waiting for delivery.
Embodiment three
The milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite of the present invention, is characterized in that: comprise the steps:
Step one: make blank:
Adopt titanium plate compound plate, substrate steel sheet and titanium plate compound plate, after three's explosive welding (EW), form titanium-steel-titanium double-sided composite plate blanks; In described step one, described titanium plate compound plate take TA1 as plied timber, thickness is 3mm, described substrate steel sheet adopts Q235B steel, all polishing pretreatment is carried out to the upper surface of substrate steel sheet and the lower surface of titanium plate compound plate, then is coated with up-protective layer at the upper surface of titanium base board, be evenly arranged TNT explosive on the protection layer, the instantaneous high-temperature produced by explosion time after ignition, shock wave are by titanium plate compound plate together with substrate steel sheet seam, and so far namely upper table compound completes; Stood up by the one side composite plate blanks of compound one deck, again carry out compound to following table, composite steps is the same with upper table compound, completes double-sided composite plate blanks immediately.In described step one, the thickness of described titanium plate compound plate is 3mm, and the thickness of described substrate steel sheet is 30mm;
Step 2: blank is checked and accepted:
Carry out an acceptance inspection to titanium-steel-titanium double-sided composite plate blanks, blank acceptance criteria requires that distance edge 5-10mm must not have obvious breakage, crackle, stick up skin and qua-lity defect; Blank unevenness is maximum must not more than 12mm/1m;
Step 3: rolling mill practice:
First stage: the titanium-steel-titanium double-sided composite plate blanks of acceptance(check) is put into stove and heats, preheating section temperature 600 DEG C in stove, heating-up temperature is 900 DEG C, and time inside furnace is 150 minutes;
Second stage: be rolled by the titanium-steel-titanium double-sided composite plate blanks after heating, start rolling temperature is 1150 DEG C, target finishing temperature 1000 DEG C, and rolling reduction is 2.5 times;
Phase III: the titanium-steel-titanium double-sided composite plate blanks after rolling is carried out on-line straightening, on-line straightening temperature, at 450 DEG C, obtains titanium-steel-titanium double-sided composite plate after on-line straightening;
In described step 3, the titanium-steel after described rolling-titanium double-sided composite plate thickness is 14.4mm, and wherein the thickness of titanium plate compound plate is 1.2mm, and the thickness of substrate steel sheet is 12mm.
In described step 3, described titanium-steel-titanium double-sided composite plate blanks produces the titanium-steel-titanium double-sided composite plate blanks obtaining low compression ratio through 2800mm production line four roller two-stand mills.
Step 4: cooling:
Adopt ultrafast refrigeration technique of new generation to carry out symmetry cooling to titanium-steel-titanium double-sided composite plate, guarantee that the cooling of upper and lower cladding is consistent;
Step 5: flaw detection:
Adopt automatic ultrasonic inspection instrument to require to detect a flaw according to JB4730-2005 to cooled titanium-steel-titanium double-sided composite plate, result display flaw detection grade reaches I grade, and to be flaw detection qualified;
Step 6: cutting, sampling:
Titanium-steel-titanium double-sided composite plate employing plasma cut the instrument qualified to flaw detection carries out the correspondingly-sized required by precise cutting one-tenth, and samples according to standard-required, send physics and chemistry to carry out mechanical property test;
Step 7: head-stamp, inspection:
Lattice automatic print-marking machine in Manama is adopted to carry out the information required by head-stamp one-tenth to surface of steel plate to the titanium-steel cut-titanium double-sided composite plate, and the length of steel plate, width, thickness, sign content and surface quality are terminated to head-stamp test, obtain final finished;
Step 8: warehouse-in:
Final finished is put into the goods yard of waiting for delivery.
Hot-rolled steel plate state mechanical property of the present invention reaches following level: shear strength > 140MPa, yield strength > 235MPa, tensile strength > 460MPa, 0 DEG C of ballistic work, 80J.Microscopic structure substrate is ferrite+pearlite, and coset is woven to titanium and does not permeate Fe base and Fe-C/Fe-Ti compound in cladding, and crystallite dimension controls at 8 μm-12 μm, and grain size controls in 8-9 level.
In the embodiment of the present invention two:
(1) heating process design and actual value (see table one)
Table one:
Because the double-sided composite plate blanks residual stress after explosive welding (EW) is larger, as too high in preheating section temperature, slab is easily caused to occur phenomenon of rupture, do not stop explosive welding (EW) land in heating process, do not occur that layering reduces high temperature section titanium plasticity and steel plasticity difference is excessive simultaneously, control at 820-900 DEG C for hot arc temperature.For avoiding the steel temperature occurring that " red and black " is alternate, time inside furnace controls according to 3.75-4.2min/mm.
(2) rolling mill practice (see table two)
Table two:
Due to blank with finished product compression ratio is lower is only 2.5 times, in the operation of rolling, require that quick steel rolling avoids temperature to decline the too fast Strip Shape Control causing the remaining large impact of rolling stress follow-up.For improving the shear strength of land and the intensity of integral plate and impact value, therefore adopt two-stage milling method, and one-phase rolling deformation rate >=33%, two-stage total deformation ratio >=40%.Smooth for guaranteeing to roll rear plate shape, whole operation of rolling requirement roller-way cooling water is all opened and is guaranteed upper and lower titanium compound plate temperature drop, distortion unanimously, and on-line straightening temperature controls below 450 DEG C.
(2) mechanical property (see table three and table four)
Table three:
Table four:
Hot-rolled steel plate state mechanical property of the present invention reaches following level: shear strength > 140MPa, yield strength > 235MPa, tensile strength > 460MPa, 0 DEG C of ballistic work, 80J.Microscopic structure substrate is ferrite+pearlite, and coset is woven to titanium and does not permeate Fe base and Fe-C/Fe-Ti compound in cladding, and crystallite dimension controls at 8 μm-12 μm, and grain size controls in 8-9 level.
In the low relevant equipment of 2800mm production line four roller two-stand mills, by rational heating process, rolling mill practice, the production methods such as straightening process, produce 2.5 times of low compression ratios and thickness is the double-sided composite plate of 14.4mm (1.2mm thickness compound plate+12mm thick substrate+1.2mm thickness compound plate), off-line is not needed to align after rolling, heat treatment etc. are done over again to plate shape and are reprocessed operation, can guarantee that As rolled plate shape unevenness reaches≤5mm/1m, mechanical property reaches standard-required, and the flaw detection grade of titanium plate and middle Q235B substrate junction reaches JB4730-2005 I grade of level up and down, it is low that production method has cost, the advantage that technological process is short, power consumption can be met preferably low, anticorrosive strong component materials demand.
Fig. 1 of the present invention is titanium-steel mixed binding place scanning tissue, and as can be seen from Figure 1, after rolling, titanium-steel mixed binding boundary line is very clear, substantially for straight line is connected.There is not titanium-steel junction indention or waveform boundary line after explosive welding (EW), further illustrate the reason that junction shearing strength after rolling is higher.
Fig. 2 of the present invention is titanium-steel compound boundary line periphery energy spectrum analysis figure, and from Fig. 2 and table five, energy spectrum analysis display around titanium-steel mixed binding boundary line after rolling, without Fe-base compound, also have no Fe and Ti atom in junction and interpenetrate, description taken in conjunction is firm.
Table five:
| Spectrum | C | Ti | Mn | Fe | Total |
| Spectrum1 | 3.17 | 59.14 | 37.69 | 100.00 | |
| Spectrum2 | 2.86 | 44.24 | 52.90 | 100.00 | |
| Spectrum3 | 2.37 | 30.90 | 66.73 | 100.00 | |
| Spectrum4 | 1.82 | 0.71 | 97.47 | 100.00 | |
| Spectrum5 | 1.59 | 2.28 | 96.13 | 100.00 |
The milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite of the present invention, by low-temperature prewarming, middle low-temperature heat pattern, the double-sided composite plate blanks that after solving explosive welding (EW), residual stress is larger is heated fully in walking beam heating furnace, and heating cost is low, and environmental pollution is little; This method adopts rational controlled rolling process production thickness to reach the double-sided composite plate of the high bond strength of 14.4mm Thin Specs, the each mechanical performance index of As rolled all reaches GB/T8547-2006 standard-required, shear strength > 140MPa, yield strength > 235MPa, tensile strength > 460MPa, 0 DEG C of ballistic work, 80J; This method successfully solves titanium-steel-titanium blast double-sided composite plate blanks and controls just can roll out the double-sided composite plate of high bond strength at 400-450 DEG C and not need off-line aligning, up and down the flaw detection grade of titanium plate and middle Q235B substrate junction to reach the technological difficulties such as JB4730-2005 I grade of level by 2.5 times of low compression ratios, on-line straightening temperature.
The double-sided composite plate blanks that the present invention forms the Q235B substrate+3mm thickness of the titanium plate compound plate+30mm thickness of 3mm thickness titanium plate compound plate by explosive welding is combined into, do not need off-line leveling, the operations such as heat treatment directly produce 2.5 times of low compression ratios and thickness is the double-sided composite plate of 14.4mm (1.2mm thickness compound plate+12mm thick substrate+1.2mm thickness compound plate) through 2800mm production line four roller two-stand mills, heat treatment is not needed after rolling, As rolled plate shape unevenness can reach≤5mm/1m, mechanical property reaches standard-required, and the flaw detection grade of titanium plate and middle Q235B substrate junction reaches JB4730-2005 I grade of level up and down, it is low that production method has cost, the advantage that technological process is short, power consumption can be met preferably low, anticorrosive strong component materials demand.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (6)
1. a milling method for the titanium-steel-titanium double-sided composite plate of Explosion composite, is characterized in that: comprise the steps:
Step one: make blank:
Adopt titanium plate compound plate, substrate steel sheet and titanium plate compound plate, after three's explosive welding (EW), form titanium-steel-titanium double-sided composite plate blanks;
Step 2: blank is checked and accepted:
Carry out an acceptance inspection to titanium-steel-titanium double-sided composite plate blanks, blank acceptance criteria requires that distance edge 5-10mm must not have obvious breakage, crackle, stick up skin and qua-lity defect; Blank unevenness is maximum must not more than 12mm/1m;
Step 3: rolling mill practice:
First stage: the titanium-steel-titanium double-sided composite plate blanks of acceptance(check) is put into stove and heats, preheating section temperature 100-600 DEG C in stove, heating-up temperature is 820-900 DEG C, and time inside furnace is 135-150 minute;
Second stage: be rolled by the titanium-steel-titanium double-sided composite plate blanks after heating, start rolling temperature is 780-1150 DEG C, target finishing temperature 750-1000 DEG C, and rolling reduction is 2.5 times;
Phase III: the titanium-steel-titanium double-sided composite plate blanks after rolling is carried out on-line straightening, on-line straightening temperature, at 400-450 DEG C, obtains titanium-steel-titanium double-sided composite plate after on-line straightening;
Step 4: cooling:
Symmetry cooling is carried out to titanium-steel-titanium double-sided composite plate, guarantees that the cooling of upper and lower cladding is consistent;
Step 5: flaw detection:
Adopt automatic ultrasonic inspection instrument to require to detect a flaw according to JB4730-2005 to cooled titanium-steel-titanium double-sided composite plate, result display flaw detection grade reaches I grade, and to be flaw detection qualified;
Step 6: cutting, sampling:
Titanium-steel-titanium double-sided composite plate employing plasma cut the instrument qualified to flaw detection carries out the correspondingly-sized required by precise cutting one-tenth, and samples according to standard-required, send physics and chemistry to carry out mechanical property test;
Step 7: head-stamp, inspection:
Lattice automatic print-marking machine in Manama is adopted to carry out the information required by head-stamp one-tenth to surface of steel plate to the titanium-steel cut-titanium double-sided composite plate, and the length of steel plate, width, thickness, sign content and surface quality are terminated to head-stamp test, obtain final finished;
Step 8: warehouse-in:
Final finished is put into the goods yard of waiting for delivery.
2. the milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite according to claim 1, it is characterized in that: in described step one, described titanium plate compound plate take TA1 as plied timber, thickness is 3mm, described substrate steel sheet adopts Q235B steel, all polishing pretreatment is carried out to the upper surface of substrate steel sheet and the lower surface of titanium plate compound plate, up-protective layer is coated with again at the upper surface of titanium base board, be evenly arranged TNT explosive on the protection layer, by instantaneous high-temperature that explosion time produces after ignition, shock wave by titanium plate compound plate together with substrate steel sheet seam, so far namely upper table compound completes, stood up by the one side composite plate blanks of compound one deck, again carry out compound to following table, composite steps is the same with upper table compound, completes double-sided composite plate blanks immediately.
3. the milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite according to claim 1, is characterized in that: in described step one, and the thickness of described titanium plate compound plate is 3mm, and the thickness of described substrate steel sheet is 30mm.
4. the milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite according to claim 1, it is characterized in that: in described step 3, titanium-steel after described rolling-titanium double-sided composite plate thickness is 14.4mm, wherein the thickness of titanium plate compound plate is 1.2mm, and the thickness of substrate steel sheet is 12mm.
5. the milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite according to claim 1, it is characterized in that: in described step 3, described titanium-steel-titanium double-sided composite plate blanks produces the titanium-steel-titanium double-sided composite plate blanks obtaining low compression ratio through 2800mm production line four roller two-stand mills.
6. the milling method of the titanium-steel-titanium double-sided composite plate of a kind of Explosion composite according to claim 1, is characterized in that: in described step 4, adopts ultrafast refrigeration technique of new generation to carry out symmetry cooling to titanium-steel-titanium double-sided composite plate.
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| CN107838194A (en) * | 2017-10-31 | 2018-03-27 | 成都先进金属材料产业技术研究院有限公司 | A kind of manufacture method of non-straight interface titanium steel composite board |
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