VACUUM GRADE BRAZING ALLOYS Today’s high tech applications, manufactured and assembled by our customers, require customised, engineered materials; components which have to meet the highest levels of quality and purity. They must guarantee functions and characteristics, VACUUM GRADE BRAZING ALLOYS even under extreme conditions, for service lives in excess of thirty years. MANUFACTURED FROM HIGH PURITY RAW METALS
To achieve 100 % performance, the specifications for materials used in joining parts have to be considered from the very beginning of the produc- tion process. Semi-fabricated materials, ribbons, preforms and wires manufactured by PFARR as vacuum grade brazing materials provide function and performance.
VACUUM SEALED FOR LIFE.
PFARR vacuum grade brazing alloys | 3 MANUFACTURING PROCESSES
vacuum continuous casting
THE BENEFITS ARE YOURS!
stamping cleaning
re-crystallisation cutting assembly operations
VARIETY
4 | GETTING SOLDER INTO SHAPE PFARR vacuum grade brazing alloys | 5 6 |GETTING SOLDERINTO SHAPE TOOLING can beused. ching andMulti-steppunching.Bothtechnologies methodes: One-step pun- There are two different ADVICE PROVIDED BY THE EXPERTISE OF PFARR decided. lysed beforethetoolingtechnologyusedcanbe Advantages anddisadvantageshavetobeana- one-step-punching multi-step-punching
KNOW HOW 8 |GETTING SOLDERINTO SHAPE COMPOSITION TOLERANCES COMPOSITION LIST OF ALLOYS OF LIST Cu Pd(18) Ag Pd(5) Ag Ag Cu(21)Pd(25) Ag Cu(20)Pd(15) Ag Cu(31.5)Pd(10) Ag Cu(26.6)Pd(5) Ag Cu(28)Ge(2)Co(0.3) Ag Cu(28)Ni(0.7) Ag Cu(28) Ag Cu(42)Ni(2) Ag Cu(27)In(13) Ag Cu(28) Ag Cu(28)Ni(0,7) Ag Cu(42)Ni(2) Ag Cu(28)Ge(2)Co(0,3) Ag Cu(26,6)Pd(5) Ag Cu(31,5)Pd(10) Ag Cu(20)Pd(15) Ag Cu(21)Pd(25) alloy composition alloy melting range 1080 -1090 970 -1010 901 -950 846 -905 812 -872 798 -824 711 -798 784 -813 770 -895 605 -710 961 780 [°C] ± 0.5% ± 0.5% ± 0.5% ± 0.5% ± 1% ± 1% ± 1% ± 1% Ag density [g/m³] 10.6 10.5 10.5 10.3 10.1 10.1 10.0 10.0 9.74 9.4 9.8 9.7 ± 0.5% ± 0.5% ± 0.5% ± 0.5% ± 1% ± 1% ± 1% ± 1% Cu ± 0.5% ± 0.5% ± 0.5% ± 0.5% ANCES tolerances Pd ± 0.2% Ge ± 0.1% Co ± 0.25% ± 0.25% Ni PRECISION material support isavailableonrequest. material support TechnicalAll indicatedvaluesaredependentonthespecificmaterialproperties. ALLOY PURITY PROCESS CAPABILITY thickness width O P Zn, Cd wire rings wire minimum brazingalloypurity washers ribbons/foils 2 , C 0.1 mm 0.4–3.0 ≥ 0.45 mm mm min inner diameter wire diameter 0.0039 inch 0.015 0.8 mm 0.0158–0.1181 diameter ≥ 0.0177 inch inch min 6.0 mm 0.0006 0.0315 inch max 0.2362 0.75–120.0 inch 1.1–178.0 ≥ 99.99%(4N) less than20ppm. less than10ppm. less than10ppm. mm mm 125.0 inner diameter outer diameter 5.0 mm ± 0.01 mm max 0.0295–4.7244 tolerances 0.433–7.0866 0.1969 4.9213 inch inch 0.0004 inch inch
PRODUCTS FLEXIBILITY PFARR vacuumgrade brazing alloys|9 10 |GETTINGSOLDER INTO SHAPE BRAZING PRECISION AT TEMPERATURES ABOVE 450 °C PROCESS BRAZING THE ace cycle. - joining operation; all in a singlefurn ametal- workpiece whileperforming ly heat-treatingorage-hardening the ample isthepotentialofsimultaneous - heat treatmentcapabilities. One ex- of thematerial,thusproviding unique andmechanicalproperties the thermal cansignificantlyimprove This, inturn, due toslowheatingandcoolingcycles. cuum, greatlyreducingresidual stresses on theworkpiecewhenheatinginava- Temperature is maintained uniformity vacuum chamber. insidea The processmustbeperformed ze jointsofhighintegrityandstrength. clean andcreatessuperior, flux-freebra- tages overothermethods:itisextremely significantadvan- technique thatoffers Vacuum brazingisamaterialsjoining be usedinavacuum. diation, asmanyothermethodscannot rature. Theheatistransferredusingra- workpiece reachesthebrazingtempe- can bemadeatoncebecausethewhole thismeansthatseveral joints a furnace; Vacuum brazingisoftenconductedin
(www.wikipedia.com) PFARR vacuumgrade brazing alloys|11 VACUUM INTERRUPTERS VACUUM CAPACITORS APPLICATIONS SURGE ARRESTERS AND TRANSIENT VOLTAGE SUPPRESSORS
MAGNETRONS
MEDICAL X-RAY TUBES THE DESIGN AND FUNCTION THYRATRONS OF VACUUM INTERRUPTERS
Vacuum interrupters are medium volta- damage. Maintaining a vacuum inside ge switches used in electrical distribu- the tube containing the switch contacts HIGH VOLTAGE RECTIFIERS tion systems. If the voltages concerned eliminates oxidation/burning when were interrupted or re-joined in air, an arcing, and enables hazard-free swit- electrical arc would develop delaying ching. HYBRID MODULES the switching process and often causing
X-RAY TUBES FOR SPACE AND DEFENCE
12 | GETTING SOLDER INTO SHAPE PFARR vacuum grade brazing alloys| 13 TECHNICAL SUPPORT OPTIMUM CONTACT: THE BASIS FOR THE HIGHEST QUALITY
In co-operation with your engineers, PFARR pro- vides its know-how and state-of-the-art equipment to analyse and optimise materials and processes. With signed agreements in place between PFARR and its partners, third parties such as technical in- stitutes and laboratories can be involved as and when necessary.
YOU CAN PROFIT FROM THIS!
14 | GETTING SOLDER INTO SHAPE PFARR vacuum grade brazing alloys | 15 OUR VISION AND MISSION
As a global player and competent partner, PFARR manufactures and supplies technical materials with the quality level of vacuum grade brazing materials (i.e. Silver, Silver/Copper-based alloys) for your vacuum grade applications. We provide technical support to optimise materi- als and existing processes. PFARR also offers the development of new brazing materials in co-operation with your development and engineering staff.
YOU CAN COUNT ON US!
VACUUM SEALED IN YOUR APPLICATION FOR LIFE
16 | GETTING SOLDER INTO SHAPE PFARR Stanztechnik GmbH D 36419 Buttlar Germany Fon +49 (0) 36967 747- 0 Fax +49 (0) 36967 747- 47 [email protected] www.pfarr.de
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