This is what vacuum brazing is for. Brazing made easy – with ... - Ipsen

Clean Machine!Vacuum brazing – highest purity and stability withoutatmospheric impacts for the toughest conditions.

Vacuum PerfectionistsA vacuum is the best available “protective gas”.The atmosphere in a vacuum furnace containssignificantly fewer impurities (measured inppm) compared with even the purest cylindergases available.Vacuum brazing is not only efficient, cost effectiveand environmentally friendly – working in a vacuumalso allows brazing without aggressive andenvironmentally damaging fluxing agents. It alsomakes it possible to do without complex reworkingor finishing of the treated components. The lackof flux inclusions in the base material improvesits mechanical stability and corrosion resistance,thereby improving its joint strength and the durabilityof the treated components. Vacuum brazingwith Ipsen furnace technology is simply perfect!The advantages of high temperature brazing infine or high vacuum make it predestined for usein producing joints that must stand up to intensethermal conditions and heavy mechanical loads.The use of vacuum brazed components has becomewell established in safety-critical aerospacetechnologies.Whether you are talking about jet engine componentsand control systems, turbine blades, heatexchangers and heating coils, honeycombs andfasteners, or medical implants and instruments,the list of products that achieve their incredibleperformance characteristics thanks to vacuumprocessing is extensive.

Masters of the VacuumIpsen’s technicians are constantly improvingour equipment, making it more productive,more efficient in its use of energy and resources,and easier to use and control.Ipsen’s Vacu-Prof ® 4 process control system featuresmany process steps and special functions,especially developed for vacuum brazing:Optimal temperature control, dependent oncomponent temperature, for homogenousheating and reduced overall process timeAutomatic leak testProcess control for guaranteed reproducibleresultsIpsen Digitrim ® for fine adjustment of heatingcontrol areas, as well as comfortable regulationof control parametersThermocouple calibrationCompliance capabilities: NADCAP, AMS2750(Aeronautic), CQI-9 (Automotive) and many more.Various fine and high vacuum pump systems areavailable to produce vacuum conditions:Single- or multi-stage mechanical vacuumpump systems (oil-sealed or dry screw-pumps)Oil diffusion pumpsTurbo-molecular- or cryo-pumps for hydrocarbon-freevacuumsThe state-of-the-art in modern furnace design isthe Ipsen VHFC enhanced high vacuum furnace,which can produce ultimate vacuums down to10 -7 mbar and achieve leak rates in the range of10 -5 mbar l/s through the use of special componentsand sealing systems.The most commonly used process and coolinggases are nitrogen (N 2), argon (Ar), hydrogen (H 2),or forming gas (N 2with

Burning Hot – High-Temperature BrazingHigh Temperature brazing in rough, fineor high vacuum is suited for thermally andmechanically stressed joints between 900°and 1200°C.Some of the advantages of Ipsen’s hightemperature brazing equipment include:Defined adjustable furnace atmosphereExcellent temperature uniformityRapid temperature controlEnvironmentally friendly, flux-agent-free brazingNo reworking or finishing of componentsNo flux residuesProtection of the furnace interior throughavoiding of fluxBest-possible mechanical stability andcorrosion resistance, thanks to lack offlux inclusions in the brazed jointsExcellent brazing purityHighly reproducible resultsUsable for a wide range of materialsVacuum brazing and high pressure gasquenching can be combined in a singletreatment cycle (for example, when producingrock drills, chisels, or tool holders)

Can Increased Efficiency andLow Pressure be Combined?Horizontal Single-Chamber Brazing Furnaces(fine and high vacuum)ü Batch dimensions up to 1200 mm x 2200 mmx 1200 mm (W x L x H) (other sizes on request)ü Unit weights up to 10 tonsü Temperature uniformity better than ± 5°Cü Working vacuum from 10 -2 to 10 -6 mbarü Graphite or metallic heating chamberü Furnace housings in regular or stainlesssteel, design below the pressure vesselguidelines availableVertical Single-Chamber Brazing Furnacesü Top- or bottom-loaders for large batchdimensions (on request)Three-Chamber Brazing Furnaces(for example, for brazing catalytic converters)ü Batch dimensions up to860 mm x 1820 mm x 760 mm (W x L x H)ü Fully automated through-feed operation withvacuum-tight internal and external doorsü Throughput: 200 to 3200 components per batchü Total batch weight up to 1000 kgü Total processing time 110 minutes(varies by process)ü Pre-heating chamber working vacuum < 10 -3 mbarü Brazing chamber operating vacuum in therange of 10 mbarü Brazing chamber operating temperature ca. 1200°Cü Unloading temperature from cooling chamber < 100°C

Fanatical Purity – Aluminum BrazingThere are very specific demands that mustbe met to make brazing aluminum undervacuum possible. Ipsen’s furnace technologyis flexible and can be individually configuredfor any given brazing process.The advantages of brazing aluminum inIpsen furnaces:Combination possible with thermalcomponent degreasing systemsDefined adjustable furnace atmosphereExcellent temperature uniformityRapid temperature controlEnvironmentally friendly, flux-agent-freebrazingNo reworking or finishing of componentsNo flux residuesProtection of the furnace interior throughavoiding of fluxBest possible mechanical stability andcorrosion resistance, thanks to lack offlux inclusions in the brazed jointsExcellent brazing purityEspecially good mechanical stability inthe area surrounding the base material

Technology from Another Worldfor the Best Quality on EarthOne of Ipsen’s specialties is incorporatingcryogenic traps within the vacuum furnaces.These allow for targeted collection of process-relatedwaste deposits in the furnaceslike magnesium, significantly improving easeof maintenance. The use of additional coldtraps to bind humidity from the air can reducethe furnaces’ evacuation time, as well as improvetheir operating and ultimate vacuums.Furthermore, Ipsen heating elements have beendesigned to guarantee excellent temperatureuniformity and optimal heat radiation even atlower temperatures. This significantly lengthensthe service life of the heating elements.Both single- and three-chamber furnaces canbe equipped with internal or external, automatictransport systems. Excellent pump, measurementand control components guaranteeoptimal working conditions. Among the manyindividualized configurations possible for variousbrazing processes and batch characteristics, thepre-heating chamber can be fitted for thermaldegreasing of the batch components.Single-Chamber Brazing Furnacesü Individual components up to1600 mm x 10000 mm x 2400 mm(W x L x H)ü Unit weights up to 50 tonsü Temperature uniformity better than ± 5°Cü Brazing chamber working vacuum in therange of 10 -5 mbar to 10 -6 mbar rangeTriple-Chamber Brazing Furnacesü Throughput up to 2000 kg per hourü Brazing chamber operating vacuum in therange of 10 -5 mbar to 10 -6 mbar rangeü Brazing chamber temperature uniformitybetter than ± 3°Cü Pre-heating chamber equipped to cleanbatch components (thermal degreasing)ü Fully automated through-feed operation withvacuum-tight internal and external doors

Creative CapitalFor more than 60 years, Ipsen has stood foradvances in heat treatment and is one of theleading international manufacturers of heattreatmentfurnaces and equipment. Our atmospheric-and vacuum-furnaces are used for a widevariety of applications, from brazing to sintering,and much more. Ipsen has a global list of clientsfrom the automotive and aerospace industries, aswell as in Tooling, Machining, Medical Engineeringand Commercial Heat Treatment.Furthermore, Ipsen is constantly improvingthanks to continuous research and development.This makes us industry leaders, but alsoguarantees quality.Ipsen International GmbHFlutstraße 7847533 KleveGermanyPhone +49 2821 804-0Fax +49 2821 804-324E-Mail sales@ipsen.deInternet www.ipsen.de