Laser technology reachs his to be in the application of metallurgy industry

Laser is one of scientific discovery with 20 the majorrest centuries. Laser is the beam of light of be concerned with that has sex of tall brightness, tall directional, tall monochromatic, this kind of magical beam of light can amount to the focusing precision that to any other place of foregone beam of light cannot achieve, and can concentrate tremendous energy inside very little scope after focusing. The height that so laser just came out to cause material scientist namely takes seriously. Technology of laser beam machining already was known as " the collective process instrumentation of prospective manufacturing industry " . Since a few centuries, when material machines a domain by handiwork, era transfers to machine a times to blaze, when be being machined by blaze again, era transfers to machine a times to report. The Dai Xiangguang when the occurrence of laser beam machining is making current report machine machines a times to transform. Laser beam machining is representing current data to machine the development direction of course of study. World each country serves as technology of laser beam machining increase production efficiency, reduce cost, raise product quality and the important step that have international competition ability. Among them, technology of laser surface aggrandizement is in nearly 20 years, get applied extensively in industrial domain, gained good economic benefits and social benefit. The basic characteristic of technology of laser beam machining does not have osculatory treatment, wear away without the tool, do not need midway to change tool; Stimulate beam of light to direct easily, focusing realizes each direction to alternate, cooperate extremely easily to undertake machining to intricate work with numerical control system; Can reach weak qualitative data to undertake machining to tall hardness, tall brittleness, high melting point; Stimulate density of energy of beam of light tall, treatment rate is rapid, workpiece is out of shape small, heat affects an area small, follow-up treatment amount is small; Produce craft combination with the tradition easily, form product line. Aggrandizement of surface of laser of 1) of classification of technology of laser beam machining and repair laser photograph change quench laser frit coagulates quench laser alloy changes laser of 2) of laser frit Fu to machine laser wool to change laser beam welding to receive stiletto of Laser Cutting laser to stimulate photoetching corrode laser to make mark laser directly. Because laser wool changes a technology to be on treatment method, rising shape function and brightness of besmear plating gloriole and respect of integrated production cost compare other Maohua method to have bigger advantage, because this laser wool changes a technology to come out to be taken seriously by steely enterprise and the height of use branch, thin plate of high grade cold rolling and small band need good material to pledge not only, and to laminose surface quality (like exterior surface roughness and form appearance) have firm demand, the figuration function that ability ensures thin plate is admirable and function of exterior besmear plating. Because glossiness of image of the reflex after lacquer is tall,laser wool changes car board, be called in abroad " lens cover armor plate " , it is the high grade board that produces limousine car face plate. Accordingly, laser wool melts cold rolling sheet metal (belt) the important raw material that is car, home appliance, electron and demand of light industry production. Laser wool changes technical fundamental its characteristic is to use the high energy density that passes special modulation (104~106W/cm2) , tall repeat frequency (every second thousands of consummate 10 thousand) beam of light of swash of arteries and veins is incident after focusing to roller surface executive warm-up is mixed, in focusing the dot is in roller surface to form tiny dissolve pool, be opposite by side-blown device at the same time the auxiliary gas of pressure of set of inflict of tiny dissolve pool, discharge, direction, the content of dissolve be in harmony that makes dissolve pool medium is pressed appoint a requirement to pile up to form table of protruding of circular arc form to dissolve pool brim as far as possible. Stage of these warm-up areas, small hole, protruding issues rapid refrigeration to form hardness aggrandizement division from the action of heat conduction in roller. It is next in laminose rolling or level off process, apparently protruding stage is in roller a certain number of is out of shape is formed again on board face sclerotic particle (small hole) , change in order to form laser wool board. Structure of this kind of new-style surface is to be below the case that does not drop tenacity of raw material qualitative surface, by countless tiny all the aggrandizement dot of cloth executes needle roll to the surface, be in thereby roller, board exterior implementation is firm soft and the exterior structure of aid. The advantage of structure of this kind of surface basically expresses the following now respect: 1) laser Mao Hua forms the table of protruding of circular arc form that distributings equably in roller surface, wool of other of apparent prep above changes its hardness, intensity means. And can effective avoid concentration of roller remains stress, tenacity to fall low phenomenon, prolong roller service life. 2) is in rolling process, improvement roller and board attrition (increase attrition power) go on wheels in order to be helpful for rolling craft with osculatory condition (can increase rolling mill to control next quantities and rolling rate) , reduce abrade and adhesion, ameliorative board, improve board face quality. 3) shapes in plank in the process, board face small hole has oil storage and cooling effect, ameliorative board and grind an attrition between and osculatory condition (reduce attrition, increase lubricant) , flow at material with benefit, make shape craft undertakes easily. In the meantime, board face small hole can be accommodated shape the metallic bits of the generation in the process, decrease shape indicate cut, improve workpiece quality. Can increase board the adherent force that faces coating and raise figuration exterior lacquer brightness, raise the additional cost of the product. Heat treatment of laser of brief introduction of technology of laser surface heat treatment is a kind of of craft of sudden appearance selective hardening new and high technology. This kind of method basically changes the face of the spare parts with Yu Jiang, the exterior hardness that can raise metallic stuff and part, wearability, be able to bear or endure corrode sex and intensity and high temperature capability; Can make spare parts core still maintains better tenacity at the same time, make the mechanical function of the spare parts has wearability tenacity of good, concussion is tall, fatigue the characteristic with high intensity. Apply technology of laser heat treatment to be able to improve product quality substantially, twice prolongs the service life of the product, have remarkable economic benefits, apply extensively already at car, metallurgy, war industry, shipping, petrifaction, mould, light industrial wait for an industry. A few effect that the meeting in the physical process of laser and material interaction produces: The classification of technology of heat treatment of laser of effect of interior of effect of surface of effect of change of states of matter of energy changeover effect: Laser quenchs (change) technical laser frit coagulates technical laser alloy changes technology of Fu of technical laser frit the rule that their collective theoretical foundation is laser and material interaction. The characteristic with 4 kinds of respective craft basically is action the laser energy density on material is different, time is different the alloy that reachs heterogeneity is pulverous. Laser (change) quench with laser frit coagulates quench laser (change) the laser after quenching the technology is to use focusing bundle incident to steely material surface, make its temperature lifts quickly change bit of above, after laser removeds, because still be in the action of fast heat conduction of the lining material of microtherm, make be heated surface layer cools quickly martensite photograph changes the dot is the following, the exterior appearance that achieves workpiece then becomes sclerotic. Laser quenchs principle and induction quench, blaze quenchs the technology is same. But its technology characteristic is, uses energy density is higher, heat rate is rapidder, do not need to quench medium, workpiece is out of shape small, heat a deepness and heat orbit is controlled easily, implement automation easily, because this is OK,replace an induction to quench stage by stage in domain of a lot of industry wait for conventional technology with thermo-chemical treatment. Laser quenchs can make workpiece surface layer 0.

1 ～ 2.

The constituent structure inside 0mm limits changes apparently with function happening. Laser frit coagulates quenching is to use face of laser melt metal, after stimulating beam of light to removed, the metal of melt is solid state forcedly from liquid state temper by dipping in water directly, form the craft of case hardening layer. Because laser frit coagulates,quench allow metallic surface to fuse, when be being operated actually, can use quench than laser more high power density and more slow scanning rate, because this laser frit coagulates,deepness of hard layer of temper by dipping in water is compared former deeper. In laser output power is 3.

When 5kw, frit of laser of large roller surface coagulates deepness of quenched hard layer of the oldest oil can achieve 2 millimeter above. Laser frit coagulates quenched insufficient place depends on, the exterior surface roughness after laser beam machining is reduced somewhat, the scope that its reduce depends on the craft parameter of laser beam machining, and laser surface quenchs can maintain workpiece surface surface roughness basically changeless. Laser quenchs coagulate with frit the common characteristic of processing is, do not need to change the class status of material, basically use the character of roller material oneself, produce martensite photograph to change come aggrandizement roller surface. Undertake laser quenchs coagulate with frit before quenching, need besmears Fu sucks optical coating one layer to enhance roller express the absorptivity that faces laser beforehand. Coagulate to laser frit for processing, uses coating still should rise to make laser bath flows make the same score the action with slagging. Accordingly, the influence that the recipe of coating reachs organization of stiff dough layer and function to the successful solid inflict of laser technology is crucial. China labour laser passes old exploration, research opens lase to quench coagulate with frit quenched series sucks optical coating, hard layer of the temper by dipping in water when making of all kinds material pledges laser quenchs distributings even. Especially laser frit coagulates quench in coating, add have the substance that smokes light to reach bath shedding to make the same score, frit coagulates hard layer of the temper by dipping in water after quenching smooth, level off, want a few treatment only, with respect to the appearance that can achieve level. Accordingly, suit the processing of laser surface aggrandizement of all sorts of roller particularly. Applied case - the double cantilever that China labour laser produces is muti_function machine tool of this laser beam machining can satisfy machine tool of numerical control laser beam machining metallurgy industry all sorts of model roller (include roller of strip steel roller, profile roller, marvellous wire to wait) the exterior aggrandizement of different position and repair processing. OK still and contented Jian Ren, disc curiums, guide etc fragile the exterior aggrandizement of a spare parts and repair requirement. Laser frit Fu and alloy change technology of laser frit Fu is to use stimulate beam of light to be in Fu of frit of surface of workpiece of make choice of the material of a special function, in order to improve the technology of workpiece surface function. Perhaps pile solder craft photograph to compare with traditional gush solder, technology of laser frit Fu has following advantages: (1) the energy density that stimulates beam of light is high, want the energy with less infuse to be able to finish laser frit Fu only. Area of spare parts hot influence is small, be out of shape small, because this suits aggrandizement or repair spare parts of a few high accuracy perhaps asks to be out of shape strict spare parts, if the exterior aggrandizement of finish rolling roller is handled. (2) rate of dilute of laser frit cladding is low, and OK and accurate control, the composition of frit cladding and function basically depend on the composition of frit Fu material. Accordingly, can use the stuff with all sorts of good performance to undertake modified to base material surface. Can use the work that craft of a few groovy v cannot realize rehabilitate of technology of laser frit Fu especially, the main shaft that is like turbine engine lamina, roller, electric machinery main shaft. (3) organization of laser frit cladding is compact, microcosmic blemish is little, frit cladding and base material are united in wedlock for metallurgy, intensity is high, because this can be used at the exterior aggrandizement of the spare parts below condition of a few burden and rehabilitate, the exterior aggrandizement that waits for a spare parts like large roller, large gear wheel, large crankshaft and rehabilitate. (4) the dimension size of laser frit cladding and position can be controlled accurately, the design guides technically optical system, can be opposite deep aperture, inside the place laser processing such as aperture of aperture, groove, blind, use a few guide optical system is like broadband scanning system specially, can make width of cladding of frit of only way laser achieves 20 ~30 Mm, every time the biggest ply of frit Fu can amount to 3mm above. Build through much talk receive the large area that can achieve workpiece appearance and Fu of frit of big ply laser, the model such as the roller of contented and different figure, dimension is fragile the requirement of laser surface aggrandizement and rehabilitate. The accretion of material of basis of craft of laser frit Fu kind is different, cent is beforehand buy coating law and synchronism send makings standard. Finish laser frit Fu through adding alloyed powder end commonly. Laser surface alloy is changed with laser frit Fu process is similar, also be the class status that changes workpiece face through adding alloying element, organization and function. But laser surface alloy changes the biggest difference with craft of laser frit Fu to depend on, former additive alloying element and base material mix adequately, both the function that decides exterior layer jointly together. And the property that laser frit Fu basically uses place to add alloyed powder end, the devotion that base material turns a performance to exterior alloy is very small. To metallurgy industry roller, guide, carry roller, clip to send roller, Jian Ren to wait many and fragile for, the biggest gain that laser frit Fu and alloy turn a technology is, turn the integral alloy of roller turn the surface into alloy change or frit Fu, make roller fragile while service life rises substantially, manufacturing cost raises finite. Apparent, the design of alloyed powder end, choice and use correct was this technology whether successful key. Laser beam welding receives one of important facets that are application of laser material processing technique. Its principle is the laser radiate high strenth to metallic surface, pass the interaction of laser and metal, make a metal fused form solder. As a result of its distinct advantage, in applying the nicety of Yu Wei, small-sized spare parts successfully to solder. High power CO2 reachs the occurrence of laser of high power YAG, open up the new field that laser beam welding receives, obtained the deep fusion welding that is theoretical foundation with keyhole effect to receive, increasingly wide application was won in the industrial department such as mechanical, car, iron and steel. Solder with other the technology is compared, the main good point that laser beam welding receives is: Laser beam welding receives rate fast, deepness is big, be out of shape small. Can undertake soldering below room temperature or special condition, solder equipment unit is simple. For example, laser traverses electromagnetism field, beam of light won't deflection; Laser is planted in vacuum, air and some solder all can be applied in gas atmosphere, can pass glass or undertake soldering to the material with transparent beam of light. After laser focusing, power density is high, soldering with high power laser when workpiece, deep wide Bikeda 5:1, highest can amount to 10:1. Can solder difficult frit material is like titanium, quartz to wait, can apply solder to opposite sex material, the result is favorable. For example, diamond curiums piece, with laser general base material (65Mn) exceed rock of hard man-made gold steel to solder with excel in, make this kind curiums a life, value times add. Can undertake miniature solders. Very small facula can be obtained after stimulating focusing of classics of beam of light, and can exact location, in the group solder of the small, small-sized component that applicable produces at big batch automation. For example, electron gun of integrated circuit down-lead, horological hairspring, picture tube is assembled, the soldering and sealing of mobile phone batteries because used laser beam welding, produce efficiency to rise greatly not only, and hot influence area is small, solder nods free from contamination, improved soldering quality greatly. The place that can solder to be close to hard, applying blame contact is remote solder, have very big flexibility. Especially in last few years, fiber-optic transmission technology was used in technology of YAG laser beam machining, make laser beam welding received a technology to win more extensive promotion and application. Stimulate beam of light of easy implementation of beam of light to press time and space prismatic, can undertake much beam of light is machined at the same time reach multitask treatment, for more accurate solder offerred a condition. At present our country steely industry is in dominant position to get line of craft of typical cold rolling is: Converter smelt - the fine outside furnace - first make friends cogging - heat joins press hard against each other - pickling - cold rolling - anneal - level off - galvanization (stannum) - into the product. Typical cold rolling craft is here medium, strip solders equipment is indispensable. In moving process, metal strip of go ahead of the rest and hind travel metal strip is indispensible undertake soldering, ability assures the activity in series of product line. Belt of silicon armor plate is online when moving, need classics for many times " S " model the moving tension with bend to be out of shape and bear constant, have very high demand to the function of welding line and quality thereby. CNC Milling