Diagram of Forging Techniques
Diagram of Forging Techniques
1. | Low carbonSteel - alsoCalled soft steel, Carbon contentFrom0.10%to0.30%Low carbonSteelEasy to accept allPlantingProcessing asForgingmake, Welding and cutting, Commonly used forManufacturingmakeChain, Rivet, Bolt, Axisetc.。 |
2. | Medium carbonSteel - Carbon contentFrom0.30% to0.60%, Used forManufacturingHeavy productionPressure forgingpiece, axle , Steel railetc.。 |
3. | High carbonSteel - oftenCalledtoolSteel , Carbon contentFrom0.60%to1.70%, Can be quenched and tempered。Hammer, Crowbars, etc. are made up of carbon content0.75%ofSteelmake; Cutting tools such asdrill , Silkattack, HingeKnives are made up of carbon content0.90% to1.00% ofSteelmake。 |
4. | alloySteel - SteelAdd other gold to itBelonging toasChromium, Nickel, Tungsten, Vanadiumetc., Make it possess several new characteristics。 Due to various reasonsPlantingThe alloy elementsMixingenter, alloySteelCan have defenseRust, anticorrosiveErosion, DurableHot, wear-resisting, Different characteristics such as shock resistance and fatigue resistance。 |
5. | high speedSteel - Containing variousPlantingIngredients and portions, asTungsten, Chromium, Vanadium, CobaltandMolybdenumetc.。 high speedSteelFinished cutting tools, High speed can be used to cut hard materials, AndCan bearStrong responsibilityCutting of force。 high speedSteelCutting tools can still maintain the cutting edge at high speedsFengbenefit, otherSteelmaterialThenprobablyBecome dull。 |
Chain steel overCheng and SexQualitythanCompared to:
Hot placereason(Heat Treatment) - It's using additionHotAnd coldButTo modifyChangegoldBelonging toPhysical propertiesQualityThe method。 Hot placeAbility to improveSteelofShow offtinyStructure, sendDa DaTo meet the required physical requirements。Tough and resilientnature, hardness And wear resistance It's throughOverheated areaLi ErObtainedThe characteristics obtainedSeveral types。 wantObtainedhave toThisSome characteristics, Need to useHot placeThe hardening in theory<alsoCalledquench>, tempering, Annealing and surface hardening operations。
Hardened(Hardening, alsoCalledquench) - yesWillgoldBelonging toallUniformDijiaHottoAppropriate temperaturedegree, Then quickly immerse in water or oil for rapid cooling, Or in an empty spaceQiMedium or coldFrozen areaMid coldBut, Make goldBelonging to obtainObtain the required hardness。
tempering - SteelAfter quenching and hardeningIt will changebrittle, withWhenCaused by quenching and rapid coolingShouldpower, Can cause steel components to break upon light impact。 To eliminate brittleness, Can be treated with tempering method。 Tempering is the process of reheating steel components to an appropriate temperature or color, Then give it a rapid cooling。Although tempering slightly reduces the hardness of steel, But it can increase the toughness of steel and reduce its brittleness。
annealing - Annealing is a method of eliminating internal stress in steel components and toughening them。 Annealing is the process of heating steel components above their critical temperature, Then put in dry ash, lime, Asbestos or enclosed in the furnace, Let it slowly cool down。
hardness(Hardness) - It is a material's ability to resist foreign objects piercing through it。The most common method for testing the hardness of steel is to file it on the edge of the workpiece with a file, Judging the hardness by the depth of scratches on its surface。 This method is called filing test method This method is not very scientific。 Using a hardness tester for extremely accurate testing, It is a commonly used method for modern hardness testing。 The most commonly used testing method is the Rockwell hardness test The Rockwell hardness tester uses the depth of diamond penetration into metal to determine its hardness, The greater the depth of penetration, The smaller the hardness。 The depth at which diamonds penetrate into metal, Can indicate the correct number from the pointer, This number is called the Rockwell hardness number。
forging - It's using a hammer to shape metal into a certain shape<forming> The method, When the steel component is heated to the forging temperature, Can engage in forging, Bend and bend, Pull it, Forming and other operations。 Most steels are easily forged when heated to a bright cherry red color。
brittleness - Indicating the property of metals being prone to breakage, The brittleness of cast iron is high, Even if it falls to the ground, it will rupture。 Brittleness is closely related to hardness, Materials with high hardness usually have high brittleness。
ductility - (Also known as softness) It is the property of metals that undergo permanent deformation under external forces without shattering, Ductile metals can be drawn into thin wires。
Elasticity - Metal is deformed by external forces, A property that returns to its original shape after the external force is eliminated。Spring steel is a highly elastic material。
hardness - Quenching is a commonly used method to increase the hardness of steel, which is a way for metals to resist foreign objects piercing or cutting。
Exhibition oriented - Also known as malleability, It is another representation of metal ductility or flexibility。Spreadtrum is a property of metal that does not break when deformed by hammering or rolling。
Resilience It is the ability of metal to withstand vibration or impact。Resilience and brittleness are exactly the opposite。
Definition of hardness of steel:
There is an important indicator in the knife making industry-hardness,There are three most commonly used indicators:Brinell hardness,Rockwell hardness and Vickers hardness。
The meaning of Brinell hardness:Use hardened steel balls of a certain diameter,Under a certain load(p)Under the influence,Press into the surface of the specimen,Stay for a period of time,Then remove the load,Measure the area of the indentation,The smaller the indentation, the greater the resistance to plastic deformation(I.e. hardness)The larger,The larger the hardness, the smaller the hardness,use“HB”To express。
The meaning of Rockwell hardness:Under the prescribed external load,Press the steel ball or diamond indenter vertically onto the surface of the specimen,Generate indentation,Test indentation depth,Using the Rockwell hardness calculation formulaHR=(K-H)/CThe Rockwell hardness can be calculated。Simply put, the shallower the indentation,HRThe larger the value,The higher the hardness of the material。use"HRC"To express。such asHRC60,It represents that the test load is150kglower,Use the vertex angle as120When using a diamond cone indenter,The indentation depth of the specimen is0.08mm。
The meaning of Brinell hardness:It is using the vertex angle as136The diamond square pyramid of the degree is used as the indenter,Press into the surface of the specimen under a certain load,Leave a square indentation,According to the length of the diagonal,The hardness value can be determined,use“HV”To express。
Generally, Rockwell hardness is used to measure the hardness of the blade,that isHRCvalue,Usually, the blade hardness of a good knife should be within Rockwell hardness50sabove,60sfollowing,In short,The higher the hardness,The higher the wear resistance,But the greater the brittleness。
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