CN104607464B - A kind of milling method of high temperature insulating screen wide cut ultra-thin molybdenum plate band - Google Patents
A kind of milling method of high temperature insulating screen wide cut ultra-thin molybdenum plate band Download PDFInfo
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- CN104607464B CN104607464B CN201510013806.9A CN201510013806A CN104607464B CN 104607464 B CN104607464 B CN 104607464B CN 201510013806 A CN201510013806 A CN 201510013806A CN 104607464 B CN104607464 B CN 104607464B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
Abstract
The invention discloses the milling method of a kind of high temperature insulating screen wide cut ultra-thin molybdenum plate band, comprise the following steps: 1) take and powder metallurgy sintered carry out air cooling after four fire time four-pass hot rollings containing lanthanum molybdenum plate blank, alkali cleaning obtains molybdenum plate A；2), after taking molybdenum plate A heating, carry out after five fire time roll through making annealing treatment to obtain molybdenum plate B；3) take molybdenum plate B carry out seven passages cold rolling after through making annealing treatment to obtain molybdenum plate C；4) carry out smooth after molybdenum plate C being rolled, obtain described molybdenum plate band.The milling method of the present invention, gained finished product molybdenum plate specification is big, and coarse grain is less, crystal grain gap is little, consistency is uniform, yield rate is high；Serviceability and surface quality are higher, improve molybdenum plate band construction quality when high temperature furnace heat-barrier material, high-temperature heating body and nuclear reactor sheath material and engineering efficiency.
Description
Technical field
The invention belongs to molybdenum plate rolling technical field, be specifically related to rolling of a kind of high temperature insulating screen wide cut ultra-thin molybdenum plate band
Method processed.
Background technology
Along with the development of modern industry, the molybdenum board material demand with excellent resistance to elevated temperatures is increased dramatically.Molybdenum board material can
For high temperature insulating plate, high-temperature furnace heating body, the sheath material etc. of nuclear reactor.The molybdenum plate band that ultra-wide overlength is ultra-thin, permissible
Reduce and connect gap welding, improve heat insulation protection quality, promote work efficiency, reduce molybdenum plate material consumption.This most with a high standard
The molybdenum product having become great competition potential developed by quality molybdenum plate band.
High temperature insulating plate molybdenum plate band, it is desirable to molybdenum plate not only wants plasticity good, intensity is high, anisotropy is little, and size is smart
Degree wants high, plate shape to be got well and surface quality wants height.In order to ensure the good result of molybdenum plate, molybdenum plate is proposed various rationalization
The requirement of energy: the defects such as molybdenum plate surface flawless, peeling, burr, molybdenum plate homogeneity controls well and strictly dimensional tolerance, and tension is strong
Degree and elongation percentage should control within the specific limits.
At present, along with domestic and international market rolling molybdenum ultra-thin to ultra-wide overlength strip added value of product improves constantly, demand
Incrementally increasing, domestic molybdenum deep processing enterprise also increases the research of the rolling to this novel Mo strip.But, domestic molybdenum plate band adds
Work enterprise practical produces and starts late, and rolling technique is delayed, and production technology is left to be desired.Molybdenum plate out made by prior art
Bandwidth curtailment, thickness are too big, consistency is uneven, surface flatness is poor, it is high to roll useless rate.These problems have a strong impact on
The serviceability of molybdenum plate band, governs the expansion in the extension product field of material based on molybdenum plate band.For high temperature on market
Heat screen, high-temperature furnace heating body, the molybdenum plate band of nuclear reactor sheath material, short of width 800mm, curtailment 3m, thickness 2mm
Above, and could not be through smooth, molybdenum plate belt surface quality and glacing flatness are relatively low.Molybdenum plate bandwidth curtailment, thickness are too big, cause
Density inhomogeneity, surface flatness are poor, have had a strong impact at high temperature insulating body, high-temperature furnace heating body, nuclear reactor sheath material
In engineer applied.
Summary of the invention
It is an object of the invention to provide the milling method of a kind of high temperature insulating screen wide cut ultra-thin molybdenum plate band, solve existing skill
Molybdenum plate bandwidth curtailment prepared by art, thickness are too big, consistency is uneven, surface flatness is poor, roll the problem that useless rate is high.
In order to realize object above, the technical solution adopted in the present invention is:
The milling method of a kind of high temperature insulating screen wide cut ultra-thin molybdenum plate band, comprises the following steps:
1) hot rolling: taking powder metallurgy sintered containing lanthanum molybdenum plate blank, the mill speed with 38～42m/min carries out four Huo Ci tetra-roads
Secondary hot rolling, the heating-up temperature of the first passage hot rolling is 1495～1505 DEG C, second, third, the heating-up temperature of four-pass hot rolling
It is 1445～1455 DEG C, air cooling after four-pass hot rolling, alkali cleaning, obtain molybdenum plate A；
2) warm-rolling: take step 1) gained molybdenum plate A, it is heated to 1095～1105 DEG C, enters with the mill speed of 42～46m/min
Row five fire time rolling, by annealing, obtains molybdenum plate B；
3) cold rolling: to take step 2) gained molybdenum plate B, it is cold rolling that the mill speed with 58～62m/min carries out seven passages, by moving back
Fire processes, and obtains molybdenum plate C；
4) smooth: by step 3) after gained molybdenum plate C rolls with the mill speed of 58～62m/min, carry out smooth, i.e.
Obtain described molybdenum plate band.
Step 1) in, described powder metallurgy sintered molybdenum plate blank includes the component of following mass percent: La0.324%,
Si0.003%, Ca0.002%, Mg0.002%, P0.001%, C0.02%, O0.003%, N0.003%, surplus is Mo.
Step 1) in, described molybdenum plate blank had carried out pre-treatment before hot rolling, and described pre-treatment is at hydrogen by molybdenum plate blank
Under atmosphere, it is heated to 895～905 DEG C and is incubated 0.9～1.1h；It is again heated to 1195～1205 DEG C and is incubated 0.9～1.1h；So
Post-heating to 1595～1605 DEG C and after being incubated 0.9～1.1h, air cooling, standby.
In described four fire time four-pass hot rollings, before every time hot rolling, need molybdenum plate blank is heated.
Step 1) in, in described four fire time four-pass course of hot rolling, by molybdenum plate blank at hydrogen atmosphere before the first passage hot rolling
Under be heated to 1495～1505 DEG C and be incubated 19～21min after start rolling；Second, third, respectively will before four-pass hot rolling
Molybdenum plate blank starts rolling after being heated to 1445～1455 DEG C in a hydrogen atmosphere and being incubated 49～51min.
In described course of hot rolling, before molybdenum plate blank enters roll, first by molybdenum plate blank steel brush or grinder buffing, dispose molybdenum
The oxide skin of steel slab surface.The described polishing time controls within 2min, after cleaning out, rapidly molybdenum plate blank is pushed roll.
Step 1) in, described four fire time four-pass hot rollings are for intersecting hot rolling, and described intersection hot rolling refers to the first, the 3rd passage heat
Roll and roll along parallel direction, second, four-pass vertically tandem rolling.
Step 1) in, in described four fire time four-pass course of hot rolling, the deformation rate of the first passage hot rolling is 30%～32%；
Second, third, the deformation rate of four-pass hot rolling be 35%～38%.
Step 1) in, described alkali cleaning is cleaning molybdenum plate in molten state alkali.Rush with water after alkali cleaning, use grinder buffing oxide skin
And crackle.
The alkali of described alkali cleaning is sodium hydroxide.
After described four fire time four-pass hot rollings, to step 1) head of gained molybdenum plate A carries out shear treatment.Shear treatment can
Efficiently control peeling layering, to obtain good surface quality.
Step 2) in, before described five fire time rollings, molybdenum plate A is heated to 1095～1105 DEG C in a hydrogen atmosphere and carries out pre-
Heat, preheating time is 19～21min.
Step 2) in, in the described five fire time operations of rolling, often heating once, rolling pass is less than 2 passages；Every time rolls
The thickness of system pressure accounts for the 25%～30% of the front gross thickness of pressure.
During warm-rolling, processing drafts to control moderate, and pass deformation is unsuitable too small, is typically greater than 25%；
But owing to warm-rolling molybdenum plate band heating-up temperature is restricted, heat a total deformation unsuitable excessive, be generally not more than 30%.
Step 2) in, described five fire time rollings are tandem rolling.
Step 2) in, described annealing be molybdenum plate is heated to 895～905 DEG C and is incubated 59～61min after, air cooling；
Step 3) in, described annealing be molybdenum plate is heated to 945～955 DEG C and is incubated 39～41min after, air cooling.
Step 3) in, in described seven passage cold-rolled process, the thickness of every time rolling pressure accounts for the front gross thickness of pressure
20%～22%.
Step 3) in, described cold rolling for tandem rolling.
Step 3) described cold rolling carry out at ambient temperature.
After described cold rolling end, to step 3) gained molybdenum plate C carries out alkali cleaning.Described alkali cleaning is to carry out molybdenum plate by molten state
Clean.The alkali of described alkali cleaning is sodium hydroxide.
Step 4) in, the deformation rate of described rolling is 0.99%～1.01%.
Step 4) in, described smooth speed is less than 60m/min.Control smooth speed and can reduce the appearance of vibration stricture of vagina.
The support roller of described smooth planisher is plain-barreled roll, and cylindricity is 0.01mm；The cylindricity of working roll is
0.005mm, roughness is 0.2；A height of 0.004mm in upper roller, lower roll is plain-barreled roll, and two roller diameter deviations are 0.01mm.
The purging system of planisher inlet location, uses water content and impurity to lack to obtain instrument supply gas, reduces molybdenum plate belt surface
Dirt.
By production and processing is monitored, control the roll change cycle；Roll rolling time is long, the serious uneven wear of roll surface,
Roll crown reduces too many, may cause flatness defect.
The milling method of described high temperature insulating screen wide cut ultra-thin molybdenum plate band also includes step 4) gained molybdenum plate band carries out
Clean；Described cleaning is to be placed in molybdenum plate band in NaOH solution to carry out ultrasonic cleaning.
In described NaOH solution, the mass concentration of NaOH is 5%～7%.
Described cleaning equipment is molybdenum plate band ultrasonic cleaning production line, concrete structure see patent CN203900029U,
CN203900123U, CN203900020U and CN203900021.
Described cleaning is to be placed in molybdenum plate band in NaOH solution to carry out ultrasonic cleaning, by prebake, S roller tension force effect,
Hot-air seasoning, to obtain final product.
In the milling method of the high temperature insulating screen wide cut ultra-thin molybdenum plate band of the present invention, the optimized choice of each control condition is such as
Under:
Step 1) in, the selection of material is powder metallurgy sintered containing lanthanum molybdenum plate blank, and slab middle rare earth La content is 0.324%.
Containing rare earth La in molybdenum slope base, molybdenum plate blank grain size during sintering and reducing can be made to diminish, improve the densification of sintering molybdenum slope base
Degree.And, along with the increase of La content, the molybdenum plate blank degree of grain refinement of sintering is the most obvious；On the other hand, institute in molybdenum plate blank
The amount containing rare earth La is too high, and molybdenum plate resistance of deformation in the course of processing will be made to strengthen, and plasticity reduces.Production practices show, molybdenum plate
In base, La is containing when being 0.324%, can meet use requirement, be not significantly affected by again the processing characteristics of molybdenum plate.
Step 1) in, described molybdenum plate blank had carried out pre-treatment before hot rolling, molybdenum plate blank will have hydrogen shield atmosphere
Under be heated to 895～905 DEG C and be incubated 0.9～1.1h；It is again heated to 1195～1205 DEG C and is incubated 0.9～1.1h；Then add
Heat is to 1595～1605 DEG C and is incubated 0.9～1.1h.The effect of pre-treatment is: easily aoxidize water suction, molybdenum plate blank material due to molybdenum
Middle meeting contains a small amount of oxygen, and surface is covered with oxide etc.；If do not removed it, oxygen will be closed in closed pore in gaseous form
In, thus the quality of sinter is had a negative impact.Molybdenum plate blank is heated to 895～905 DEG C, insulation 0.9～1.1h, permissible
Big raising molybdenum plate blank quality, improves follow-up rolling molybdenum strip yield rate；It is heated to 1195～1205 DEG C, is incubated 0.9～1.1h, makes
The impurity volatilization of low melting point；It is heated to 1595～1605 DEG C, is incubated 0.9～1.1h, makes relatively high melting point impurities volatilize.
Step 1) in, molybdenum plate blank is heated to 1495～1505 DEG C under having hydrogen shield atmosphere, after insulation 19～21min
Carry out split rolling method.Select rational cogging temperature, the resistance of deformation of cogging process can be reduced, improve the rolling matter of molybdenum plate band
Amount and yield rate.Cogging temperature is chosen can not be too high, when temperature is too high, not only makes coarse grains in molybdenum base, strengthens electric energy loss,
And the structure property of finished product molybdenum plate band is also had negative effect.Cogging temperature is chosen can not be too low, when temperature is too low, greatly
Cogging drafts effect under, then molybdenum base easily ftractures, ruptures.Add the molybdenum plate blank of the La of 0.324%, with pure molybdenum plate blank
Comparing, resistance of deformation increases, and plasticity has been deteriorated.Pure molybdenum plate blank breakdown rolling temperaure is generally 1400 DEG C～1420 DEG C；
The cogging temperature of the molybdenum plate blank containing La elects 1495～1505 DEG C as, and molybdenum base scraps phenomenon without cracking.
Step 1) in, in the hot rolling, first pass deformation rate uses the aximal deformation value of 30%～32%, and later passage becomes
Form quotient is 35%～38%.Big deflection can make molybdenum plate blank internal modification uniform so that it is in processing subsequently, is unlikely to produce
Layer estranged, roll defects such as splitting, also can make the gap grating Guan Bis such as the closed pore in molybdenum base, pore.
Step 1) in, in the hot rolling, before molybdenum plate blank enters roll, first by molybdenum plate blank grinder buffing, remove
Fall the oxide skin on molybdenum plate blank surface.This process time can not be long, should control within 2min.After cleaning out, rapidly by molybdenum
Slab pushes roll.Molybdenum plate blank is easily oxidized in atmosphere, and the oxide of molybdenum can be pressed in molybdenum plate band affects molybdenum plate band
Surface quality and subsequent rolling process, also can reduce the frictional force of molybdenum plate blank, when molybdenum board rolling is nipped produce skid.
Step 1) in, in the hot rolling, carry out four fire time four-pass cogging hot rollings altogether.After every time hot rolling terminates, also
The molybdenum plate blank of cooling is heated.Rear three passage heating-up temperatures are lower than the first passage 50 DEG C, are set as 1445～1455 DEG C,
Temperature retention time 50min.The pyroconductivity of molybdenum plate is the highest, puts and can cool down rapidly in atmosphere, it is impossible to realize the insulation of molybdenum plate band, because of
And after every time rolling terminates, the molybdenum plate blank of cooling will be heated.The heating-up temperature of hot rolling is higher than tying again of molybdenum ribbon
Brilliant temperature, the hot-rolled temperature adding La molybdenum plate band should be higher than that the heating-up temperature of pure molybdenum plate band, so when cogging hot rolling, after setting three
Passage heating-up temperature is 1445～1455 DEG C.Temperature retention time 49～51min, it is possible to achieve the homogenizing annealing of molybdenum plate band.
Step 1) in, in the hot rolling, the first passage, the 3rd passage roll along parallel direction, the second passage, the 4th road
Secondary vertically tandem rolling.During rolling molybdenum plate, by the way of commutation rolls, it is possible to reduce the anisotropy of molybdenum plate, carry
The performance of high molybdenum plate.
Step 1) in, in the hot rolling, keep mill speed 38～42m/min.When mill speed is relatively low, the operation of rolling
Skidding is there will be between middle roll and slab.It addition, mill speed is relatively low, molybdenum plate blank cooling rate is fast, oxidation aggravation.
Step 1) in, in the hot rolling, the 4th rolling terminates rear air cooling, cleans molybdenum plate in molten state alkali pond, after
Water rushes, with grinder buffing oxide skin and crackle.By this technique, improve molybdenum plate belt surface cleannes, it is possible to increase warm-rolling molybdenum plate
Band quality.
Step 1) gained molybdenum plate A before warm-rolling, the head of the molybdenum plate after hot rolling is carried out shear treatment.By this technique,
The layering of molybdenum plate peeling can be efficiently controlled, it is thus achieved that good surface quality.
Step 2) in, the heating-up temperature of described warm-rolling is 1095～1105 DEG C, preheating 19～21min before rolling.Heating temperature
Degree selects 1095～1105 DEG C, can effectively reduce the resistance of deformation of molybdenum plate, prevents molybdenum plate crystal grain from becoming big.Preheating 19～21min,
Molybdenum plate blank homogeneous temperature, eliminate rolling stress simultaneously, it is to avoid the generation of micro-crack.
Step 2) in, during warm-rolling, the thickness of every time rolling pressure accounts for the 25%～30% of the front gross thickness of pressure.
During warm-rolling, processing drafts to control moderate, and pass deformation is unsuitable too small, is typically greater than 25%；But due to temperature
Roll molybdenum plate band heating-up temperature to be restricted, heat a total deformation unsuitable excessive, be generally not more than 30%.Heating once, is rolled
Passage processed is less than secondary.
Step 2) in, the molybdenum plate after rolling is heated to 895～905 DEG C of annealing, air cooling after the retention time 59～61min.
By scanning electron microscope analysis, interlaced between molybdenum plate crystal grain, arrange compact, after this explanation is annealed at 895～905 DEG C, molybdenum plate
Horizontal and vertical combination property the best.
After warm-rolling terminates before cold rolling beginning, with preparation to step 2) gained molybdenum plate band B is carried out.Molybdenum plate band exists
During high temperature rolling, plate surface oxide layer is by pollutant such as volatile for uneven adhesion low melting point molybdenum trioxides.If
Continue processing, in making these impurity polluted press-in plate surface layer, form the pockmark white point on molybdenum plate surface.Additionally, molybdenum plate
Some microcracks that surface occurs when rolling, it is possible to washed down by preparation erosion and remove.
Step 3) in, in cold-rolled process, molybdenum plate band is not carried out on-line heating.Owing to molybdenum plate tape thickness is the least, it is difficult to
Insulation, and along with the increase of deflection, the crisp transition temperature of moulding of molybdenum plate band has descended to below room temperature, it is not necessary to heating.
Meanwhile, in order to obtain the molybdenum plate band crystalline structure with premium properties, it is also desirable to use cold rolling.
Step 3) in, in cold-rolled process, the thickness of every time rolling pressure accounts for the 20%～22% of the front gross thickness of pressure.
In cold-rolled process, processing drafts to control moderate, and pass deformation is unsuitable excessive, is typically less than 25%.According to production
Practice, finds at deflection to be 20%～22%, and molybdenum plate band splits phenomenon without rolling.When deflection is more than 25%, molybdenum plate splits with rolling
Situation occurs.
Step 3) in, the molybdenum plate after rolling is heated to 945～955 DEG C of annealing, air cooling after the retention time 39～41min.
When cold rolling, molybdenum plate band can produce serious distortional stress, makes roll-force increase, and deformation difficulty, molybdenum plate band is easily broken off, waste product
Rate increases.Finding in production practices, molybdenum plate is heated to 945～955 DEG C, and the retention time 39～41min anneals, can be to containing La molybdenum
Plate plays the effect well eliminating processing hardening.
After cold rolling end before smooth beginning, with preparation to step 3) gained molybdenum plate C is carried out.Molybdenum plate band is rolling
During system, plate surface oxide layer is by pollutant such as volatile for uneven adhesion low melting point molybdenum trioxides.If continuing to add
Work, in making these impurity polluted press-in plate surface layer, forms the pockmark white point on molybdenum plate surface.Additionally, molybdenum plate surface exists
Some microcracks occurred during rolling, it is possible to washed down by preparation erosion and remove.
Step 3) in, in cold-rolled process, mill speed controls 58～62m/min.In cold-rolled process, according to rolling
Time the various factors quality influence degree to strip, mill speed controls, 58～62m/min, can effectively reduce the change of molybdenum plate
Shape drag, prevents molybdenum plate crystal grain from becoming big.
Step 4) in, mill speed 58～62m/min, deformation rate is 0.99%～1.01%.This is in formation process,
According to the various factors influence degree to plate shape during rolling, molybdenum flatness defect is carried out effective control method.
Step 4) in, in formation process, by improving the purging system of planisher inlet location, increase by row's nozzle,
Angle between nozzle blowing direction and molybdenum plate is 145 degree.By strengthening purging wind speed and air quantity, purge molybdenum plate belt surface
Dirt.Use water content and the few instrument supply gas of impurity, reduce the dirt of molybdenum plate belt surface.Molybdenum plate belt surface cleannes improve 90%
Above, any water stain and speckle has been can't see in range estimation.
Step 4) in, in formation process, the smooth speed controlling planisher is less than 60m/min, and planisher is produced from
Exciting phenomenon controls in velocity interval, can effectively control horizontal vibration, prevents molybdenum plate from rolling vibration stricture of vagina occur.
Step 4) in, in formation process, by production and processing is monitored, control the roll change cycle.By production monitoring and
Processing statistics, analyzes processing statistics data, can obtain the universal law sexual cycle of roll change, ahead of time prevention molybdenum plate leveling rolling damping
The generation of dynamic stricture of vagina.If in the course of processing, once there is vibration sign in roller, or vibration stricture of vagina occurs in molybdenum plate surface, should
Roll change immediately.
It is carried out after smooth, in cleaning process, by the reasonable distribution of tension section, increases the measures such as height roller,
Making molybdenum plate band have certain cornerite on each roller, horizontal tension increases, and preferably solves molybdenum plate band on production equipment
The phenomenon such as wrinkling backfin.Bottom, according to foil cleaning characteristics, when passing in and out drying baker, is respectively set up a pair S rod, is made sliver
Tension adjustment is more reasonable, has both ensured cleaning, drying requirement, and after having ensured again cleaning, molybdenum plate band tightly wraps neat requirement.
In cleaning process, the NaOH using mass concentration to be 5%～7% in cleaning by degreasing groove on molybdenum strip line
Solution, increases upper and lower a pair ultrasonic oscillator pole, use up and down apart from adjustable (150mm), oscillation power is adjustable, carry in order to surface
The surface cleanness degree of high molybdenum plate band.
In cleaning process, increase 20KW high-pressure hot wind prebake system, use upper and lower certain angle to blowing, outlet temperature
70～90 DEG C, air outlet is reverse with foil direct of travel, angle 60～70 degree, rotation speed of fan 2900rpm, power of fan 11KW,
Air quantity 8936Pa, air quantity 3619m3/h.Use before molybdenum plate band enters S roller, the water of strip surface is remained and prebake
Effect.Finally eliminating the band adhesion at S roller, wrinkling reduces more than 95%, and backfin phenomenon reduces more than 98%.
The milling method of the high temperature insulating screen wide cut ultra-thin molybdenum plate band of the present invention, with powder metallurgy sintered containing lanthanum molybdenum plate blank
For raw material, carrying out hot rolling, warm-rolling, cold rolling, flattening process successively, gained finished product molybdenum plate specification is big, and width reaches 1100mm, and thickness can
Less than 0.4mm, thickness deviation is within ± 1%, and length is up to 25000mm；Coarse grain is less, crystal grain gap is little, consistency is equal
Even, field trash is less, yield rate is high, other defect seldom occurs；Gained molybdenum plate band finished product serviceability and surface quality are relatively
Height, meets the use requirement as high temperature insulating screen of the molybdenum plate band, drastically increase molybdenum plate band for high temperature furnace heat-barrier material,
Construction quality when high-temperature heating body and nuclear reactor sheath material and engineering efficiency.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further illustrated.
Embodiment 1
The milling method of the high temperature insulating screen wide cut ultra-thin molybdenum plate band of the present embodiment, comprises the following steps:
1) hot rolling:
Take powder metallurgy sintered containing lanthanum molybdenum plate blank, specification 57mm × 450mm × 450mm, density 9.6g/cm3, substance
110kg, described powder metallurgy sintered molybdenum plate blank includes the component of following mass percent: La0.324%, Si0.003%,
Ca0.002%, Mg0.002%, P0.001%, C0.02%, O0.003%, N0.003%, surplus is Mo.
Molybdenum plate blank is carried out pre-treatment: molybdenum plate blank is put into 450kw Medium Frequency Induction Heating Furnace, having hydrogen shield atmosphere
Under be heated to 900 DEG C, be incubated 1h；It is again heated to 1200 DEG C, is incubated 1h；It is then heated to 1600 DEG C, insulation 1h, rear air cooling, standby
With；
Take the molybdenum plate blank after pre-treatment, put into 450kw Medium Frequency Induction Heating Furnace, be heated under having hydrogen shield atmosphere
1500 DEG C, it is incubated 20min, is placed on ф 800mm × 1200mm bis-roller hot pack mill and carries out split rolling method；Enter in molybdenum plate blank and roll
Before roller, first molybdenum plate blank steel brush is polished, dispose the oxide skin on molybdenum plate blank surface；This process time control 2min with
In, after cleaning out, rapidly molybdenum plate blank is pushed roll；
During split rolling method, carry out four fire time four-pass cogging hot rollings altogether with the mill speed of 40m/min；Every time
After hot rolling terminates, also the molybdenum plate blank of cooling is heated；Rear three passage heating-up temperatures are lower than the first passage 50 DEG C, are set as
1450 DEG C, temperature retention time 50min；
During split rolling method, the first passage, the 3rd passage roll along parallel direction, the second passage, four-pass edge
Vertical direction tandem rolling；First pass deformation rate use 30%～32% aximal deformation value, second, third, four-pass become
Form quotient is 35%～38%；The thickness of the present embodiment is the molybdenum plate blank that 57 ± 0.2mm is thick, and drafts is as shown in table 1 below:
Every time pressure scale in table 1 embodiment 1 cogging course of hot rolling
| Passage | 1 | 2 | 3 | 4 |
| Supplied materials thickness (mm) | 57.00 | 39.33 | 24.78 | 15.61 |
| Finished product thickness (mm) | 39.33 | 24.78 | 15.61 | 10.00 |
| Absolute draft amount (%) | 17.67 | 14.55 | 9.17 | 5.61 |
| Relative reduction (%) | 31.00 | 37.00 | 37.00 | 35.94 |
| General working rate (%) before final pass | 0.00 | 31.00 | 56.53 | 71.56 |
| General working rate (%) after final pass | 31.00 | 56.53 | 72.61 | 82.46 |
During split rolling method, keep mill speed 40m/min；
Four-pass rolling terminate after, air cooling, in molten state alkali pond clean molybdenum plate, after with water rush, use grinder buffing oxygen
Change skin and crackle；The head of gained molybdenum plate is carried out shear treatment, efficiently controls peeling layering, it is thus achieved that good surface matter
Amount, obtains the molybdenum plate A of long 1100mm × wide 1000mm × thickness 10mm；
2) warm-rolling:
Take step 1) gained molybdenum plate A, puts into 450kw Medium Frequency Induction Heating Furnace, is heated under having hydrogen shield atmosphere
1100 DEG C, after preheating 20min, it is placed in 1200mm 4-roller reversible cold rolling mill group, carries out 5 fire with the mill speed of 44m/min
Secondary warm-rolling；
During warm-rolling, every fire time heating once, rolls a time；The thickness of every time rolling pressure is total before accounting for pressure
The 25%～30% of thickness；During warm-rolling, processing drafts to control moderate, and pass deformation is unsuitable too small, typically wants
More than 25%；But owing to warm-rolling molybdenum plate band heating-up temperature is restricted, heat a total deformation unsuitable excessive, be generally not more than
30%；The thickness of the present embodiment is the molybdenum plate blank that 10 ± 0.1mm is thick, and drafts is as shown in table 2 below:
Every time pressure scale during table 2 embodiment 1 warm-rolling
| Passage | 1 | 2 | 3 | 4 | 5 |
| Supplied materials thickness (mm) | 10.00 | 7.40 | 5.33 | 3.84 | 2.76 |
| Finished product thickness (mm) | 7.40 | 5.33 | 3.84 | 2.76 | 2 |
| Absolute draft amount (%) | 2.60 | 2.07 | 1.49 | 1.08 | 0.76 |
| Relative reduction (%) | 26.00 | 28.00 | 28.00 | 28 | 27.54 |
| General working rate (%) before final pass | 0.00 | 26.00 | 46.70 | 61.60 | 72.40 |
| General working rate (%) after final pass | 26.00 | 46.70 | 61.60 | 72.40 | 80.00 |
During warm-rolling, holding mill speed is 44m/min；
After 5th passes terminates, molybdenum plate is heated to 900 DEG C of annealing, keeps air cooling after 60min；By gained molybdenum plate
It is carried out with preparation, obtains the molybdenum plate B of long 5000mm × wide 1100mm × thickness 2mm；
3) cold rolling:
Take step 2) gained molybdenum plate B, at room temperature by 1200mm 4-roller reversible cold rolling mill group, with the rolling of 60m/min
It is cold rolling that speed carries out seven passages；
Described cold rolling for tandem rolling；In cold-rolled process, the thickness of every time pressure accounts for the 20% of the front gross thickness of pressure
～22%；The thickness of the present embodiment is the molybdenum plate blank of 2 ± 0.1mm, and drafts is as shown in table 3 below:
Every time pressure scale in table 3 embodiment 1 cold-rolled process
| Passage | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Supplied materials thickness (mm) | 2.00 | 1.58 | 1.25 | 0.99 | 0.78 | 0.62 | 0.50 |
| Finished product thickness (mm) | 1.58 | 1.25 | 0.99 | 0.78 | 0.62 | 0.50 | 0.40 |
| Absolute draft amount (%) | 0.42 | 0.33 | 0.26 | 0.21 | 0.16 | 0.12 | 0.10 |
| Relative reduction (%) | 21.00 | 21.00 | 21.00 | 21.00 | 21.00 | 20.00 | 20.00 |
| General working rate (%) before final pass | 0.00 | 21.00 | 37.50 | 50.50 | 61.00 | 69.00 | 75.00 |
| General working rate (%) after final pass | 21.00 | 37.50 | 50.50 | 61.00 | 69.00 | 75.00 | 80.00 |
In cold-rolled process, mill speed controls at 60m/min；
After 7th passes terminates, the molybdenum plate after rolling is heated to 950 DEG C of annealing, keeps air cooling after 40min；To institute
Obtain molybdenum plate band preparation to be carried out, obtain the molybdenum plate C of long 25000mm × wide 1100mm × thickness 0.4mm；
4) smooth:
By step 3) gained molybdenum plate C rolls with the mill speed of 60m/min, and rolling deformation rate is 1%；
Molybdenum plate after rolling is placed in the 1200mm tetra-reversible planisher of roller and carries out smooth；Before smooth, roll is ground
Cutting, support roller mill is whittled into plain-barreled roll, cylindricity is 0.01mm；The cylindricity of working roll is 0.005mm, and roughness is 0.2；Upper roller
In a height of 0.004mm, lower roll is plain-barreled roll, and two roller diameter deviations are 0.01mm；Improve the purging system of planisher inlet location
System, increases by row's nozzle, and the angle between nozzle blowing direction and molybdenum plate is 145 degree, uses water content and the few instrument of impurity
Gas, reduces the dirt of molybdenum plate belt surface；
Time smooth, the smooth speed controlling planisher is 55m/min (less than 60m/min), reduces the appearance of vibration stricture of vagina；Logical
Crossing and monitor production and processing, control the roll change cycle, roll rolling time is long, the serious uneven wear of roll surface, and roll crown drops
Low too much, flatness defect may be caused；After smooth end, obtain described molybdenum plate band.
Gained molybdenum plate band is placed in the NaOH solution that mass concentration is 5% and carries out ultrasonic cleaning, by prebake, S roller
Tension force effect, hot-air seasoning, obtain described high temperature insulating screen wide cut ultra-thin molybdenum plate band.
In cleaning process, described prebake is to increase 20KW high-pressure hot wind prebake system, uses upper and lower certain angle pair
Blowing, outlet temperature 90 DEG C, air outlet is reverse with foil direct of travel, angle 70 degree, rotation speed of fan 2900rpm, power of fan
11KW, air quantity 8936Pa, air quantity 3619m3/h；Use before molybdenum plate band enters S roller, the water residual of strip surface is carried out
Prebake effect, finally eliminates the band adhesion at S roller, and wrinkling reduces more than 95%, backfin phenomenon reduce 98% with
On.
Embodiment 2
The milling method of the high temperature insulating screen wide cut ultra-thin molybdenum plate band of the present embodiment, comprises the following steps:
1) hot rolling:
Take powder metallurgy sintered containing lanthanum molybdenum plate blank, specification 57mm × 450mm × 450mm, density 9.6g/cm3, substance
110kg, described powder metallurgy sintered molybdenum plate blank includes the component of following mass percent: La0.324%, Si0.003%,
Ca0.002%, Mg0.002%, P0.001%, C0.02%, O0.003%, N0.003%, surplus is Mo.
Molybdenum plate blank is carried out pre-treatment: molybdenum plate blank is put into 450kw Medium Frequency Induction Heating Furnace, having hydrogen shield atmosphere
Under be heated to 905 DEG C, be incubated 1h；It is again heated to 1205 DEG C, is incubated 1h；It is then heated to 1605 DEG C, insulation 1h, rear air cooling, standby
With；
Take the molybdenum plate blank after pre-treatment, put into 450kw Medium Frequency Induction Heating Furnace, be heated under having hydrogen shield atmosphere
1495 DEG C, it is incubated 20min, is placed on ф 800mm × 1200mm bis-roller hot pack mill and carries out split rolling method；Enter in molybdenum plate blank and roll
Before roller, first molybdenum plate blank steel brush is polished, dispose the oxide skin on molybdenum plate blank surface；This process time control 2min with
In, after cleaning out, rapidly molybdenum plate blank is pushed roll；
During split rolling method, carry out four fire time four-pass cogging hot rollings altogether with the mill speed of 38m/min；Every time
After hot rolling terminates, also the molybdenum plate blank of cooling is heated；Rear three passage heating-up temperatures are lower than the first passage 50 DEG C, are set as
1445 DEG C, temperature retention time 50min；
During split rolling method, the first passage, the 3rd passage roll along parallel direction, the second passage, four-pass edge
Vertical direction tandem rolling；First pass deformation rate use 30%～32% aximal deformation value, second, third, four-pass become
Form quotient is 35%～38%；The thickness of the present embodiment is the molybdenum plate blank that 57 ± 0.2mm is thick, and drafts is as shown in table 1 below:
Every time pressure scale in table 1 embodiment 1 cogging course of hot rolling
| Passage | 1 | 2 | 3 | 4 |
| Supplied materials thickness (mm) | 57.00 | 39.90 | 25.94 | 16.08 |
| Finished product thickness (mm) | 39.90 | 25.94 | 16.08 | 10.00 |
| Absolute draft amount (%) | 17.10 | 13.96 | 9.86 | 6.08 |
| Relative reduction (%) | 30.00 | 35.00 | 38.00 | 37.81 |
| General working rate (%) before final pass | 0.00 | 31.00 | 54.49 | 71.56 |
| General working rate (%) after final pass | 30.00 | 54.49 | 71.79 | 82.46 |
During split rolling method, keep mill speed 38m/min；
Four-pass rolling terminate after, air cooling, in molten state alkali pond clean molybdenum plate, after with water rush, use grinder buffing oxygen
Change skin and crackle；The head of gained molybdenum plate is carried out shear treatment, efficiently controls peeling layering, it is thus achieved that good surface matter
Amount, obtains the molybdenum plate A of long 1100mm × wide 1000mm × thickness 10mm；
2) warm-rolling:
Take step 1) gained molybdenum plate A, puts into 450kw Medium Frequency Induction Heating Furnace, is heated under having hydrogen shield atmosphere
1100 DEG C, after preheating 20min, it is placed in 1200mm 4-roller reversible cold rolling mill group, carries out 5 fire with the mill speed of 44m/min
Secondary warm-rolling；
During warm-rolling, once, rolling pass is once in every fire time heating；The thickness of every time rolling pressure accounts for pressure
The 25%～30% of front gross thickness；During warm-rolling, processing drafts to control moderate, and pass deformation is unsuitable too small, and one
As be greater than 25%；But owing to warm-rolling molybdenum plate band heating-up temperature is restricted, heat a total deformation unsuitable excessive, the most not
Higher than 30%；The thickness of the present embodiment is the molybdenum plate blank that 10 ± 0.1mm is thick, and drafts is as shown in table 2 below:
Every time pressure scale during table 2 embodiment 1 warm-rolling
| Passage | 1 | 2 | 3 | 4 | 5 |
| Supplied materials thickness (mm) | 10.00 | 7.50 | 5.63 | 3.94 | 2.76 |
| Finished product thickness (mm) | 7.50 | 5.63 | 3.94 | 2.76 | 2 |
| Absolute draft amount (%) | 2.50 | 1.87 | 1.69 | 1.18 | 0.76 |
| Relative reduction (%) | 25.00 | 25.00 | 30.00 | 30 | 27.54 |
| General working rate (%) before final pass | 0.00 | 25.00 | 43.70 | 60.60 | 72.40 |
| General working rate (%) after final pass | 25.00 | 43.70 | 60.60 | 72.40 | 80.00 |
During warm-rolling, holding mill speed is 42m/min；
After 5th passes terminates, molybdenum plate is heated to 895 DEG C of annealing, keeps air cooling after 60min；By gained molybdenum plate
It is carried out with preparation, obtains the molybdenum plate B of long 5000mm × wide 1100mm × thickness 2mm；
3) cold rolling:
Take step 2) gained molybdenum plate B, at room temperature by 1200mm 4-roller reversible cold rolling mill group, with the rolling of 62m/min
It is cold rolling that speed carries out seven passages；
Described cold rolling for tandem rolling；In cold-rolled process, the thickness of every time pressure accounts for the 20% of the front gross thickness of pressure
～22%；The thickness of the present embodiment is the molybdenum plate blank of 2 ± 0.1mm, and drafts is as shown in table 3 below:
Every time pressure scale in table 3 embodiment 1 cold-rolled process
| Passage | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Supplied materials thickness (mm) | 2.00 | 1.60 | 1.28 | 1.02 | 0.80 | 0.62 | 0.50 |
| Finished product thickness (mm) | 1.60 | 1.28 | 1.02 | 0.80 | 0.62 | 0.50 | 0.40 |
| Absolute draft amount (%) | 0.40 | 0.32 | 0.26 | 0.22 | 0.18 | 0.12 | 0.10 |
| Relative reduction (%) | 20.00 | 20.00 | 20.00 | 22.00 | 22.00 | 20.00 | 20.00 |
| General working rate (%) before final pass | 0.00 | 20.00 | 36.00 | 49.00 | 60.00 | 69.00 | 75.00 |
| General working rate (%) after final pass | 20.00 | 36.00 | 49.00 | 60.00 | 69.00 | 75.00 | 80.00 |
In cold-rolled process, mill speed controls at 62m/min；
After 7th passes terminates, the molybdenum plate after rolling is heated to 950 DEG C of annealing, keeps air cooling after 40min；To institute
Obtain molybdenum plate band preparation to be carried out, obtain the molybdenum plate C of long 25000mm × wide 1100mm × thickness 0.4mm；
4) smooth:
By step 3) gained molybdenum plate C rolls with the mill speed of 62m/min, and rolling deformation rate is 1%；
Molybdenum plate after rolling is placed in the 1200mm tetra-reversible planisher of roller and carries out smooth；Before smooth, roll is ground
Cutting, support roller mill is whittled into plain-barreled roll, cylindricity is 0.01mm；The cylindricity of working roll is 0.005mm, and roughness is 0.2；Upper roller
In a height of 0.004mm, lower roll is plain-barreled roll, and two roller diameter deviations are 0.01mm；Improve the purging system of planisher inlet location
System, increases by row's nozzle, and the angle between nozzle blowing direction and molybdenum plate is 145 degree, uses water content and the few instrument of impurity
Gas, reduces the dirt of molybdenum plate belt surface；
Time smooth, the smooth speed controlling planisher is 50m/min (less than 60m/min), reduces the appearance of vibration stricture of vagina；Logical
Crossing and monitor production and processing, control the roll change cycle, roll rolling time is long, the serious uneven wear of roll surface, and roll crown drops
Low too much, flatness defect may be caused；After smooth end, obtain described molybdenum plate band.
Gained molybdenum plate band is placed in the NaOH solution that mass concentration is 6% and carries out ultrasonic cleaning, by prebake, S roller
Tension force effect, hot-air seasoning, obtain described high temperature insulating screen wide cut ultra-thin molybdenum plate band.
In cleaning process, described prebake is to increase 20KW high-pressure hot wind prebake system, uses upper and lower certain angle pair
Blowing, outlet temperature 70 DEG C, air outlet is reverse with foil direct of travel, angle 60 degree, rotation speed of fan 2900rpm, power of fan
11KW, air quantity 8936Pa, air quantity 3619m3/h；Use before molybdenum plate band enters S roller, the water residual of strip surface is carried out
Prebake effect, finally eliminates the band adhesion at S roller, and wrinkling reduces more than 95%, backfin phenomenon reduce 98% with
On.
Embodiment 3
The milling method of the high temperature insulating screen wide cut ultra-thin molybdenum plate band of the present embodiment, comprises the following steps:
1) hot rolling:
Take powder metallurgy sintered containing lanthanum molybdenum plate blank, specification 57mm × 450mm × 450mm, density 9.6g/cm3, substance
110kg, described powder metallurgy sintered molybdenum plate blank includes the component of following mass percent: La0.324%, Si0.003%,
Ca0.002%, Mg0.002%, P0.001%, C0.02%, O0.003%, N0.003%, surplus is Mo.
Molybdenum plate blank is carried out pre-treatment: molybdenum plate blank is put into 450kw Medium Frequency Induction Heating Furnace, having hydrogen shield atmosphere
Under be heated to 895 DEG C, be incubated 1h；It is again heated to 1195 DEG C, is incubated 1h；It is then heated to 1595 DEG C, insulation 1h, rear air cooling, standby
With；
Take the molybdenum plate blank after pre-treatment, put into 450kw Medium Frequency Induction Heating Furnace, be heated under having hydrogen shield atmosphere
1505 DEG C, it is incubated 20min, is placed on ф 800mm × 1200mm bis-roller hot pack mill and carries out split rolling method；Enter in molybdenum plate blank and roll
Before roller, first molybdenum plate blank steel brush is polished, dispose the oxide skin on molybdenum plate blank surface；This process time control 2min with
In, after cleaning out, rapidly molybdenum plate blank is pushed roll；
During split rolling method, carry out four fire time four-pass cogging hot rollings altogether with the mill speed of 40m/min；Every time
After hot rolling terminates, also the molybdenum plate blank of cooling is heated；Rear three passage heating-up temperatures are lower than the first passage 50 DEG C, are set as
1455 DEG C, temperature retention time 50min；
During split rolling method, the first passage, the 3rd passage roll along parallel direction, the second passage, four-pass edge
Vertical direction tandem rolling；First pass deformation rate use 30%～32% aximal deformation value, second, third, four-pass become
Form quotient is 35%～38%；The thickness of the present embodiment is the molybdenum plate blank that 57 ± 0.2mm is thick, and drafts is as shown in table 1 below:
Every time pressure scale in table 1 embodiment 1 cogging course of hot rolling
| Passage | 1 | 2 | 3 | 4 |
| Supplied materials thickness (mm) | 57.00 | 38.76 | 24.03 | 15.62 |
| Finished product thickness (mm) | 38.76 | 24.03 | 15.62 | 10.00 |
| Absolute draft amount (%) | 18.24 | 14.73 | 8.41 | 5.62 |
| Relative reduction (%) | 32.00 | 38.00 | 35.00 | 35.98 |
| General working rate (%) before final pass | 0.00 | 32.00 | 57.84 | 72.60 |
| General working rate (%) after final pass | 32.00 | 57.84 | 72.60 | 82.46 |
During split rolling method, keep mill speed 42m/min；
Four-pass rolling terminate after, air cooling, in molten state alkali pond clean molybdenum plate, after with water rush, use grinder buffing oxygen
Change skin and crackle；The head of gained molybdenum plate is carried out shear treatment, efficiently controls peeling layering, it is thus achieved that good surface matter
Amount, obtains the molybdenum plate A of long 1100mm × wide 1000mm × thickness 10mm；
2) warm-rolling:
Take step 1) gained molybdenum plate A, puts into 450kw Medium Frequency Induction Heating Furnace, is heated under having hydrogen shield atmosphere
1105 DEG C, after preheating 20min, it is placed in 1200mm 4-roller reversible cold rolling mill group, carries out 5 fire with the mill speed of 46m/min
Secondary warm-rolling；
During warm-rolling, once, rolling pass is once in every fire time heating；The thickness of every time rolling pressure accounts for pressure
The 25%～30% of front gross thickness；During warm-rolling, processing drafts to control moderate, and pass deformation is unsuitable too small, and one
As be greater than 25%；But owing to warm-rolling molybdenum plate band heating-up temperature is restricted, heat a total deformation unsuitable excessive, the most not
Higher than 30%；The thickness of the present embodiment is the molybdenum plate blank that 10 ± 0.1mm is thick, and drafts is as shown in table 2 below:
Every time pressure scale during table 2 embodiment 1 warm-rolling
| Passage | 1 | 2 | 3 | 4 | 5 |
| Supplied materials thickness (mm) | 10.00 | 7.00 | 4.90 | 3.58 | 2.69 |
| Finished product thickness (mm) | 7.00 | 4.90 | 3.58 | 2.69 | 2 |
| Absolute draft amount (%) | 3.00 | 2.10 | 1.32 | 0.89 | 0.69 |
| Relative reduction (%) | 30.00 | 30.00 | 27.00 | 25 | 25.65 |
| General working rate (%) before final pass | 0.00 | 30.00 | 51.00 | 64.20 | 73.10 |
| General working rate (%) after final pass | 30.00 | 51.00 | 64.20 | 73.10 | 80.00 |
During warm-rolling, holding mill speed is 46m/min；
After 5th passes terminates, molybdenum plate is heated to 905 DEG C of annealing, keeps air cooling after 60min；By gained molybdenum plate
It is carried out with preparation, obtains the molybdenum plate B of long 5000mm × wide 1100mm × thickness 2mm；
3) cold rolling:
Take step 2) gained molybdenum plate B, at room temperature by 1200mm 4-roller reversible cold rolling mill group, with the rolling of 58m/min
It is cold rolling that speed carries out seven passages；
Described cold rolling for tandem rolling；In cold-rolled process, the thickness of every time pressure accounts for the 20% of the front gross thickness of pressure
～22%；The thickness of the present embodiment is the molybdenum plate blank of 2 ± 0.1mm, and drafts is as shown in table 3 below:
Every time pressure scale in table 3 embodiment 1 cold-rolled process
| Passage | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Supplied materials thickness (mm) | 2.00 | 1.56 | 1.22 | 0.98 | 0.78 | 0.62 | 0.50 |
| Finished product thickness (mm) | 1.56 | 1.22 | 0.98 | 0.78 | 0.62 | 0.50 | 0.40 |
| Absolute draft amount (%) | 0.44 | 0.34 | 0.24 | 0.20 | 0.16 | 0.12 | 0.10 |
| Relative reduction (%) | 22.00 | 22.00 | 20.00 | 20.00 | 20.00 | 20.00 | 20.00 |
| General working rate (%) before final pass | 0.00 | 22.00 | 39.00 | 51.50 | 61.00 | 69.00 | 75.00 |
| General working rate (%) after final pass | 22.00 | 39.00 | 51.00 | 61.00 | 69.00 | 75.00 | 80.00 |
In cold-rolled process, mill speed controls at 58m/min；
After 7th passes terminates, the molybdenum plate after rolling is heated to 945 DEG C of annealing, keeps air cooling after 40min；To institute
Obtain molybdenum plate band preparation to be carried out, obtain the molybdenum plate C of long 25000mm × wide 1100mm × thickness 0.4mm；
4) smooth:
By step 3) gained molybdenum plate C rolls with the mill speed of 58m/min, and rolling deformation rate is 1%；
Molybdenum plate after rolling is placed in the 1200mm tetra-reversible planisher of roller and carries out smooth；Before smooth, roll is ground
Cutting, support roller mill is whittled into plain-barreled roll, cylindricity is 0.01mm；The cylindricity of working roll is 0.005mm, and roughness is 0.2；Upper roller
In a height of 0.004mm, lower roll is plain-barreled roll, and two roller diameter deviations are 0.01mm；Improve the purging system of planisher inlet location
System, increases by row's nozzle, and the angle between nozzle blowing direction and molybdenum plate is 145 degree, uses water content and the few instrument of impurity
Gas, reduces the dirt of molybdenum plate belt surface；
Time smooth, the smooth speed controlling planisher is 50m/min (less than 60m/min), reduces the appearance of vibration stricture of vagina；Logical
Crossing and monitor production and processing, control the roll change cycle, roll rolling time is long, the serious uneven wear of roll surface, and roll crown drops
Low too much, flatness defect may be caused；After smooth end, obtain described molybdenum plate band.
Gained molybdenum plate band is placed in the NaOH solution that mass concentration is 7% and carries out ultrasonic cleaning, by prebake, S roller
Tension force effect, hot-air seasoning, obtain described high temperature insulating screen wide cut ultra-thin molybdenum plate band.
In cleaning process, described prebake is to increase 20KW high-pressure hot wind prebake system, uses upper and lower certain angle pair
Blowing, outlet temperature 80 DEG C, air outlet is reverse with foil direct of travel, angle 65 degree, rotation speed of fan 2900rpm, power of fan
11KW, air quantity 8936Pa, air quantity 3619m3/h；Use before molybdenum plate band enters S roller, the water residual of strip surface is carried out
Prebake effect, finally eliminates the band adhesion at S roller, and wrinkling reduces more than 95%, backfin phenomenon reduce 98% with
On.
Experimental example
Example 1～3 gained high temperature insulating screen wide cut ultra-thin molybdenum plate carry sample carries out performance detection, and testing result is such as
Shown in table 7.
Wherein, comparative example is that (cold-rolling thin molybdenum plate that Jinduicheng Molybdenum Co., Ltd produces, performs mark in commercial goods
Accurate: ASTM B386-03, thick 0.2-2mm, wide 600mm, long 20000mm).
Table 7 embodiment 1～3 gained high temperature insulating screen wide cut ultra-thin molybdenum plate band performance test results
Performance test results shows: embodiment 1～3 gained high temperature insulating screen wide cut ultra-thin molybdenum plate band, the aobvious ellipse of structure cell
Shape, crystal grain is uniform, and gap is little；Average crystal grain length 25 μm, reduces 25% more than 60 μm number of die than common molybdenum plate (comparative example),
And total amount is less than 15%；The common molybdenum plate of consistency equalization improves more than 50%.The high temperature insulating processed with this molybdenum plate band
Body material, plasticity improve more than 30%, intensity improve more than 15%, anisotropy reduce by 10%, molybdenum plate surface flawless, rise
The defect such as skin, burr, molybdenum plate surfacing, smooth rate than common molybdenum plate improve more than 80%, surface cleanness improve 80% with
On.Result of the test shows: the milling method of the high temperature insulating screen wide cut ultra-thin molybdenum plate band of the present invention, gained finished product molybdenum plate specification
Greatly, coarse grain is less, crystal grain gap is little, consistency is uniform, field trash is less, yield rate is high, and other defect seldom occurs；Institute
Obtain molybdenum plate band finished product serviceability and surface quality is higher, meet the use requirement as high temperature insulating screen of the molybdenum plate band, greatly
Improve molybdenum plate band construction quality when high temperature furnace heat-barrier material, high-temperature heating body and nuclear reactor sheath material and work
Journey efficiency.
Claims (7)
1. the milling method of a high temperature insulating screen wide cut ultra-thin molybdenum plate band, it is characterised in that: comprise the following steps:
1) hot rolling: take powder metallurgy sintered containing lanthanum molybdenum plate blank, the mill speed with 38～42m/min carries out four fire time four-pass heat
Rolling, the heating-up temperature of the first passage hot rolling is 1495～1505 DEG C, second, third, the heating-up temperature of four-pass hot rolling be
1445～1455 DEG C, air cooling after four-pass hot rolling, alkali cleaning, obtain molybdenum plate A；
2) warm-rolling: take step 1) gained molybdenum plate A, it is heated to 1095～1105 DEG C, the mill speed with 42～46m/min carries out five
Fire time rolling, by annealing, obtains molybdenum plate B；
3) cold rolling: to take step 2) gained molybdenum plate B, it is cold rolling that the mill speed with 58～62m/min carries out seven passages, by annealing treatment
Reason, obtains molybdenum plate C；
4) smooth: by step 3) after gained molybdenum plate C rolls with the mill speed of 58～62m/min, carry out smooth, obtain institute
State molybdenum plate band；
Step 1) in, in described four fire time four-pass course of hot rolling, the deformation rate of the first passage hot rolling is 30%～32%；The
Two, the 3rd, the deformation rate of four-pass hot rolling is 35%～38%；
Step 2) in, in the described five fire time operations of rolling, often heating once, rolling pass is less than 2 passages；Every time rolls pressure
Under thickness account for pressure before gross thickness 25%～30%；
Step 3) in, in described seven passage cold-rolled process, every time rolling pressure thickness account for pressure before gross thickness 20%～
22%.
The milling method of high temperature insulating screen wide cut the most according to claim 1 ultra-thin molybdenum plate band, it is characterised in that: step
1) in, described molybdenum plate blank had carried out pre-treatment before hot rolling, and described pre-treatment is by molybdenum plate blank in a hydrogen atmosphere, is heated to
895～905 DEG C and be incubated 0.9～1.1h；It is again heated to 1195～1205 DEG C and is incubated 0.9～1.1h；It is then heated to 1595
～1605 DEG C and after being incubated 0.9～1.1h, air cooling, standby.
The milling method of high temperature insulating screen wide cut the most according to claim 1 ultra-thin molybdenum plate band, it is characterised in that: step
1), in, in described four fire time four-pass course of hot rolling, before the first passage hot rolling, molybdenum plate blank is heated in a hydrogen atmosphere 1495
～1505 DEG C and start rolling after being incubated 19～21min；Second, third, before four-pass hot rolling respectively by molybdenum plate blank at hydrogen
Rolling is started after being heated to 1445～1455 DEG C under atmosphere and being incubated 49～51min.
The milling method of high temperature insulating screen wide cut the most according to claim 1 ultra-thin molybdenum plate band, it is characterised in that: step
1), in, described four fire time four-pass hot rollings are for intersecting hot rolling, and described intersection hot rolling refers to that the first, the 3rd passage hot rolling is along parallel direction
Rolling, second, four-pass vertically tandem rolling.
The milling method of high temperature insulating screen wide cut the most according to claim 1 ultra-thin molybdenum plate band, it is characterised in that: step
2) in, described annealing be molybdenum plate is heated to 895～905 DEG C and is incubated 59～61min after, air cooling；Step 3) in, described
Annealing be molybdenum plate is heated to 945～955 DEG C and is incubated 39～41min after, air cooling.
The milling method of high temperature insulating screen wide cut the most according to claim 1 ultra-thin molybdenum plate band, it is characterised in that: step
4), in, described smooth speed is less than 60m/min.
The milling method of high temperature insulating screen wide cut the most according to claim 1 ultra-thin molybdenum plate band, it is characterised in that: to step
Rapid 4) gained molybdenum plate band is carried out；Described cleaning is to be placed in molybdenum plate band in NaOH solution to carry out ultrasonic cleaning.
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| CN109848424B (en) * | 2018-12-03 | 2021-08-10 | 有研工程技术研究院有限公司 | Molybdenum foil for grid control pulse traveling wave tube grid mesh and preparation method thereof |
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| JPH01205054A (en) * | 1988-02-09 | 1989-08-17 | Tokyo Tungsten Co Ltd | Molybdenum material and its production |
| JPH06256918A (en) * | 1992-05-15 | 1994-09-13 | Japan Energy Corp | Production of molybdenum or molybdenum alloy sheet |
| CN1243120C (en) * | 2003-08-02 | 2006-02-22 | 宜兴市兴达合金材料厂 | Method for working ultrathin high-planeness molybdenum sheet |
| CN100424219C (en) * | 2007-02-07 | 2008-10-08 | 宜兴市宝登合金有限公司 | Ultra-thin precision deep drawing molding rolling method for molybdenum sheet |
| CN102626845B (en) * | 2012-03-27 | 2015-06-03 | 苏州先端稀有金属有限公司 | Molybdenum lanthanum alloy tray processing method |
| CN103774020B (en) * | 2014-01-23 | 2016-01-20 | 安泰科技股份有限公司 | The preparation method of Mo Re alloys foil |
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