BÖHLER HOT WORK TOOL STEELS For Forging

BÖHLER HOT WORK TOOL STEELSfor forging

HOT WORKTOOL STEELFORGED PIECES ARE USED WHENEVER THE REQUIREMENTS FORTHE MECHANICAL PROPERTIES OF CERTAIN COMPONENTS ARE HIGH.Naturally, compliance with these properties will only be able to be fulfilled by highstrength materials; materials which in turn require the appropriate wear resistant toolsteels during the deformation process in order to be able to meet those diverserequirements.We at voestalpine BÖHLER Edelstahl know these requirements well and offer youcustom-made hot work tool steel for your commercial needs.2

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YOURBENEFITAs a forger you expecthigh and uniform life-timesmaximum safety against failureduring operationAs a result, many demands on thesteel are derived, such ashigh thermal shock resistancehigh hot strengthAs a tool maker you expecthigh retention of hardnesseconomical production throughhigh hot toughness rovision of raw material forpminimum machining(tolerance, machining allowance)high hot wear resistanceeasy processing and goodmachinabilitysimple, reliable heat treatmentbest dimensional stabilityduring heat treatment4high thermal conductivitylow sticking tendency

THE SELECTIONCRITERIASELCTION OF THE FORGING PROCESSHot (Forging)Semi hotCold (extrusion)Process temperature 1742 F 950 C1202 – 1742 F650 – 950 C 392 F 200 CShapeany shape desiredrotation symmetric where possiblemostly rotation symmetricforged materialsany material desiredany material desiredlow alloyed steel (C 0.45 %)tolerances attainableIT12 – IT16IT9 – IT12IT7 – IT11surface quality R attainable 100 μm 50 μm 10 μmeconomical serial size 500 Pieces 10.000 Pieces 3.000 Piecestool materialHot work tool steelHot work tool steel, high speed steel,cemented carbidesCold work tool steel, high speed steel,cemented carbidestool life5.000 – 10.000 Pieces10.000 – 20.000 Pieces20.000 – 30.000 Piecesmaterial output60 – 80 % 85 %85 – 90 %5

FORGING IS THE NON-CUTTING SHAPING OF METALSBETWEEN TWO TOOLS. THE CHOICE OF TOOL STEELIS PRIMARILY DETERMINED BYTHE RESPECTIVE FORGING PROCESS.6

CUSTOM-MADETOOL MATERIALSDrop forgingRapid forgingDrop forging is carried out by impactingmaterial with a hammer or by applying agreat amount of pressure with a forgingpress or forging machine.A fully automatic multi-stage press isforging equipment that produces eventhe most difficult shapes from materialshard to deform in several stages ofdeformation. This equipment mostlyproduces rotation symmetric parts.Heating the slugs, feeding, shearing anddeforming take place completelyautomatically.When forging with a hammer the forgingpiece is only in contact with the die fora short period of time. Due to this, thedie has to withstand lower temperatures.However, the mechanical stress is high.This, it is quite important for the hot worktool steel used to have very goodtoughness properties.Compared with that, the contact duringforging pressing occurs over a longerperiod of time, which then causes ahigher temperature strain on the tool.Thus, in such a case hot work tool steelswith a chromium-molybdenum base areused, which are singled out as havingg o o d t e m p e r i n g re s i s t a n c e , h i g htemperature strength, hot wearresistance, and hot toughness.Semi hot forgingThe term semi hot forging refers to adeformation process in which theworkpiece is preheated to such a pointthat permanent strain hardening occursunder the given deformation conditions.This definition means that the material isdeformed below the recrystallizationtemperature, yet the term is also usedfor temperatures occurring above this.In practice this is understood to be thedeformation of steel in the temperaturerange of 650 to approx. 950 C [1202 toapprox. 1742 F]. These temperatureslie significantly below the conventionalforging temperatures of 1100 – 1250 C[2012 – ca. 2282 F].7

WITH A HAMMERForgingToolBÖHLER gradeHardness in service in HRc (guide)close diedie38 – 52die insert41 – 5241 – 5241 – 5241 – 5250 – 5641 – 5241 – 52IN A PRESSForgingToolopen diedieBÖHLER gradeHardness in service in HRc (guide)41 – 5241 – 5241 – 5241 – 5250 – 5641 – 5241 – 52die insert41 – 5241 – 5241 – 5241 – 5241 – 5250 – 5641 – 5241 – 528

TOOL STEEL FORDROP FORGINGFOR SEMI HOT FORGINGForgingToolrapid forging machine,semi hot forgingdie, plunger, ramBÖHLER gradeHardness in service in HRC (guide)46 – 5246 – 5246 – 5246 – 5250 – 5746 – 529

THE QUALITIESThree qualities for a wide area of applicationsPRODUCTION ROUTES FOR BÖHLER HOT WORK TOOL STEELSMeltingSecondary metallurgyCastingRemeltingESR Electroslagremelting processLadle furnaceIngot castingElectric arc furnace52 MN PresseSpecialHeat treatmentVODVAR Vacuum remeltingarc furnace» Conventional Hot Work Tool Steels» Specially heat treated10» Hot Work Tool Steels, ESR quality» Specially heat treated» Hot Work Tool Steels, VAR quality» Specially heat treated

BÖHLER GradeType of alloy %StandardsCCrMoVOthersDIN / ENAISI0.385.001.300.40Si 1.10 1.2343 X38CrMoV 5 1H110.395.201.400.95Si 1.10 1.2344 X40CrMoV 5 1H130.385.002.800.55– 1.2367 X38CrMoV 5 3–0.312.902.800.50– 1.2365 X32CrMoV 3 3H100.385.001.750.55Si 0.20N def.––0.504.503.000.600.365.001.300.45Si 0.201.2340 H110.385.002.800.65– 1.2367–11

NOTES:The data contained in this brochure is merely for general information and therefore shall not be binding on the company. We may be bound onlythrough a contract explicitly stipulating such data as binding. The manufacture of our products does not involve the use of substances detrimentalto health or to the ozone layer.SPECIAL STEELS FOR THE WORLD’S TOP PERFORMERSEDRO Specialty Steels, Inc.310 Wayne Ave. Ellwood City, PA 16117, United StatesP. 1 (888) 368-3376F. 1 (724) 758-2076E. info@edro.comWWW.EDRO.COM US.BOHLER.COM

Drop forging Drop forging is carried out by impacting material with a hammer or by applying a great amount of pressure with a forging press or forging machine. When forging with a hammer the forging piece is o