Chao Feng Electric Co., Ltd., Henan

High frequency quenching of high speed steel super Feng electrical three tips

High frequency?quenching?of high speed steel?superFeng electrical?trick

Quenching heating temperature,?high speed steelquenching temperature?selection:?from the increase in?quantity,?improve?carbide?into?Austenitic?Alloy’s perspective,?the austenitizing temperature,?the higher the better,?in order to increase?the wear resistance of steel and?red?hardness.?But from thegrain,?strength?perspective,?with the increase?of austenitizing temperature,?grain coarsening?steel,after reaching a?certain limit,?after reaching acertain limit,?strength and toughness?of steel?willfall.?And?there is a close relationship betweenthese two aspects?and?the tool life,?so the choice of?quenching temperature?correctly,?has greatinfluence on?the service life of the tool.?With the increase?of heating temperature?high frequencyquenching?furnace,?carbide?continuously into thematrix,?high speed steel,?steel?residual carbidescontinue into,?Henan?Feng electrical equipmentlimited company for the?matrix?of high speed steel,the number?of residual carbides?in steel?decreased continuously.?From?the?perspective of?alloying,?hope to?improve the quenching temperature,?the?carbidedissolve into the matrix?as much as possible.?But with the?increase of quenching temperature,?the grain size?of steel?grew up.?As?the grain sizedecreases,?the strength of steel,?increased brittleness.?Effect of grain size on the?tool lifesituation is more complex,?the?discontinuous cuttingtools,?the influence?law?is significant,?and?the finer the grain size,?the higher the?tool life.?Thismay bear a certain?impact and?discontinuous cuttingtool?cutting?tool,?has high toughness?about.?Thecontinuous cutting?tools,?grain size on the?cutting tool?life,?some?test data,?but the opposite conclusion.

Cutting tools?of different types,?different specifications,?different?conditions of use,?choose the?quenching furnace?temperature?is the?carbidesolubility and?grain size?control?to the best state,so that?the?wear resistance,?toughness,?red hardnessand?good cooperation,?so as to?get the best?toollife.?The?cutting force?is small,?bearing the bruntof small tools,?such as?quenching temperature?toolshould choose?higher.?The?heavy load,?discontinuous cutting?tool?bear greater impact?quenching heating temperature should be?selected?high.?The?heavy load,discontinuous cutting?tool?bear greater impactshould choose the?quenching temperature?low.?In order to prevent the?complex shape?and?slender,?thin and tough?tool?quenching crack?quenching distortionand?reduce,?should adopt the?quenching temperatureslightly lower.?The factory?can choose?quenching heating temperature?under conditions of use?in the manufacture of?their own?tools.?As?a?tool in cuttingdifficult to machine materials?or in?high speed and small?amount of feed?of the cutting conditions,should choose the?quenching temperature?slightly higher.?If?cutting?large impact?force?or equipmentvibration?should choose the?quenching temperatureslightly lower.?May be necessary?to determine the optimum?quenching temperature?some?tools in?theplant specific?conditions of use?by cutting test.

High frequency?quenching?of high speed steel?superFeng Electrical?key two

Quenching?heating time,?heating?time?of high-speed steel?tool?with?effective thickness?is?heating coefficient?tool?to calculate.?The heatingcoefficient?is?calculated?to?shoulder?heatingheating time?basis,?in the actual production of?a lot of?charging,?consideration must be given to theheating furnace?type,?structure,?power,?clampingsize,?preheating?and other factors?to determine the final?heat insulation time.?High speed steelquenching,?to achieve the?dissolution of carbiderelatively full,?get a higher?degree of?AusteniteFormation,?quenching heating?temperature and holding time?are important,?but?the temperature of thegreater role.

High frequency?quenching?of high speed steel?superFeng Electrical?key three

Cooling?of high speed steel?must be?sufficient?to ensure that?the cooling rate?during cooling?no carbide?precipitation?from?a?saturated?austenite?inquenching,?so as not to reduce the?austenitic?alloy,reduce the?hardness?after quenching?red,?or even reduce?the quenching hardness.?If the?quench coolingprocess?of carbide?along the grain boundaries,?it will reduce the?toughness of the steel.?The quenching cooling?method of high-speed steel?tool for heating?in salt bath?is mostly used in?salt bathquenching.?Small?size?tools can be?cooled by air.Tool?requirements such as?high red hardness?toolcommonly used?oil cooling.?With complex shape,?large tool?or?quenching distortion?requirements more stringent?tool?by?austempering.?The cooling temperature?quenching?usually 550?or 600 degrees Celsius,?quenching?holding time?and quenchingheating equipment?heat preservation?time is the same.?When the?quenching?temperature?more than 650 degrees Celsius?will make the?cutting life ofdiscontinuous cutting?tool?down,?this is because thegraded?temperature is too high,?stay in the?process of?classification of?carbide?precipitates along the grain boundaries,?reduce?the toughness of steel.?So the?discontinuous cutting?tools,?quenchingtemperature to?no more than 650?degrees Celsius for good.?The?continuous cutting?tools,?due to?very small impact?cutting,?is not high?on the?toughness requirements,?thus?improving?graded temperature?can increase the?precipitation of?carbides,?but the effect on?the?cutting?tool?life is not?significantly more?quenching?for enquiry?please call 159-9369-2891engineering?consulting?the?article written byhttp://www.yunjiangbang.com/2