焊接科學與工程專業英語（簡體書）

《普通高等教育材料成型及控制工程系列規劃教材：焊接科學與工程專業英語》主要介紹焊接技術與工程專業的基礎知識和專業知識英語文獻。《普通高等教育材料成型及控制工程系列規劃教材：焊接科學與工程專業英語》內容大部分選自國外原版教材，教材共分九章，內容包括焊接技術與工程專業知識的諸多方面的英語文獻。內容涉及現代工程結構材料、金屬材料的力學性能及熱物理性能、鋼的熱處理、電弧物理等焊接技術基礎知識，以及弧焊電源、焊接方法及設備、焊接冶金學、焊接工藝、焊接應力與變形、焊接自動化及焊接質量檢驗等焊接專業知識。
《普通高等教育材料成型及控制工程系列規劃教材：焊接科學與工程專業英語》為高等院校焊接專業學生專用教材，也可以供從事焊接技術與工程領域工作的工程技術人員參考。

《普通高等教育材料成型及控制工程系列規劃教材:焊接科學與工程專業英語》為高等院校焊接專業學生專用教材，也可以供從事焊接技術與工程領域工作的工程技術人員參考。

Chapter1WeldingTechnologyFundamental
1.1ModernEngineeringStructuralMaterial
1.2MechanicalPropertyofMetalMaterial
1.3ThermophysicalPropertyofMetalMaterial
1.3.1SpecificHeat
1.3.2ThermalExpansion
1.3.3ThermalConductivity
1.3.4MeltingPointorMeltingRange
1.3.5ThermionicWorkFunction
1.4PrincipalTypesofHeatTreatmentofSteel
1.5ArcPhysics
1.5.1StabilityofElectricArc
1.5.2StabilityofACArc

Chapter2ArcWeldingPowerSource
2.1ClassificationofPowerSource
2.1.1ACPowerSupplies
2.1.2DCpowersupplies
2.1.3InverseSourceofArcWelding
2.2ElectricalCharacteristicsofPowerSource
2.2.1ConstantVoltage
2.2.2ConstantCurrent
2.2.3CombinedConstant?CurrentandConstantVoltageCharacteristics
2.3SelectingandSpecifyingaPowerSource

Chapter3ArcWeldingProcess
3.1ShieldedMetal?ArcWelding
3.2GasShielded?ArcWelding
3.2.1SpecificAdvantagesofGas?shieldedArc
3.2.2TypesofGas?ShieldedArcProcesses
3.2.3GasTungstenArc?Tig
3.2.4GasMetalArc?Mig
3.2.5CO2Welding
3.2.6PulsedArcWelding
3.3SubmergedArcWeldingFundamentalsoftheprocess
3.3.1Definitionandgeneraldescription
3.3.2Principlesofoperation
3.4PlasmaArcWelding
3.4.1KeyholeAction
3.4.2ArcShaping
3.4.3OperatingData
3.4.4Applications
3.4.5Summary

Chapter4OtherWeldingMethods
4.1ResistanceWelding
4.1.1Introduction
4.1.2ResistanceSpotWelding（RSW）
4.1.3ProjectionWelding
4.1.4ResistanceSeamWelding（RSEW）
4.1.5UpsetButtWelding
4.1.6FlashButtWelding
4.2FrictionStirWelding
4.2.1Introduction
4.2.2Principles
4.2.3FrictionStirTool
4.2.4FrictionStirringImperfections
4.3LaserBeamWelding
4.3.1Introduction
4.3.2Principles
4.3.3MetalsWelded
4.3.4Machines
4.3.5ParametersandTechnology
4.4ElectronBeamWelding
4.4.1Introduction
4.4.2Principles
4.4.3Variations
4.4.4Equipment
4.4.5Safety

Chapter5WeldingMetallurgy
5.1ChemicalReactionsinWelding
5.1.1Overview
5.1.2Gas?MetalReactions
5.1.3Slag?MetalReactions
5.2WeldMetalSolidification
5.2.1EpitaxialGrowthatFusionBoundary
5.2.2NonepitaxialGrowthatFusionBoundary
5.2.3CompetitiveGrowthinBulkFusionZone
5.2.4EffectofWeldingParametersonGrainStructure
5.2.5WeldMetalNucleationMechanisms
5.2.6GrainStructureControl
5.3TheMicrostructureandPropertiesofHeat?affectedZone
5.3.1WeldingThermalCycle
5.3.2TheMicrostructureChangesintheHAZ
5.3.3HardnessDistributionintheHAZ
5.3.4WeldingCracksintheHAZ

Chapter6WeldabilityofMaterial
6.1WeldabilityofMaterialandTestingMethod
6.1.1WeldabilityofMaterial
6.1.2WeldabilityEvaluationandTestMethod
6.2Weldabilityoflowcarbonsteel
6.2.1Metallurgyoftheliquidweldmetal
6.2.2Solidificationandsolidificationcracking
6.2.3Stressintensification,embrittlementandcrackingoffusionweldsbelowthesolidus
6.2.4Lamellartearing
6.2.5ReheatCracking
6.3WeldabilityofMagnesiumandItsAlloys
6.3.1AlloysandWeldingProcedures
6.3.2OxideFilmRemoval
6.3.3Cracking
6.3.4MechanicalProperties
6.3.5CorrosionResistanceandFireRisk

Chapter7ResidualStresses,DistortionandFatigue
7.1Residualstresses
7.1.1Developmentofresidualstresses
7.1.2AnalysisofResidualStresses
7.2Distortion
7.2.1Cause
7.2.2Remedies
7.3Fatigue
7.3.1Mechanism
7.3.2Fractography
7.3.3S?NCurves
7.3.4EffectofJointGeometry
7.3.5EffectofStressRaisers
7.3.6EffectofCorrosion
7.3.7Remedies
7.4CaseStudies
7.4.1FailureofaSteelPipeAssembly
7.4.2FailureofaBallMill

Chapter8AutomationofWelding
8.1IntroductionofAutomaticWeldingSystem
8.2FlexibleAutomationofWelding
8.3ARCWeldingRobots
8.3.1Introduction
8.3.2RobotManipulatorConfiguration
8.3.3RobotWeldingApplication
8.3.4BuyingaWeldingRobot
8.3.5RobotSafety
8.4ControlsforAutomaticArcWelding
8.4.1AutomaticWeldingControllers
8.4.2RobotControllers
8.4.3TeachingtheRobot
8.4.4RobotMemory
8.4.5WeldExecution
8.5SensorsandAdaptiveControl
8.5.1Introduction
8.5.2ContactSensors
8.5.3NoncontactSensorSystems
8.6ToolingandFixtures

Chapter9WeldingQualityInspection
9.1WeldingDefects
9.1.1DefinitionandTypes
9.1.2Cracks
9.1.3Porosity
9.1.4SolidInclusion
9.1.5LackofFusionandInadequateorincompletepenetration
9.1.6ImperfectShape
9.2Non?destructiveTesting
9.2.1RadiographicTesting
9.2.2UltrasonicTesting（UT）
9.2.3MagneticParticleInspection（MPI）
9.2.4LiquidPenetrantTesting（PT）
9.3DestructiveTest
9.3.1TensionTests
9.3.2BendTests
9.3.3CharpyTests
9.3.4HardnessTesting
9.4RadiographInterpretation
9.4.1GeneralWeldingDiscontinuities
9.4.2OtherDiscontinuities
References

The output current of a transformer power supply is controlled by changing the magnetic coupling between the primary and secondary coil or by adjusting the inductance of the circuit.The output of a transformer may be directly applied for proper welding conditions. However， generally an impedance is inserted in series with the transformer and the work load.The electrical characteristics for welding are adjusted by the impedance.
There are several transformer designs to provide desired output volt－ampere characteristics for an arc welding condition， including tapped secondary coil control. movable－coil control. movableshunt control. movable－core reactor， saturable reactor control. These designs are briefly described as follows.
（1） Tapped secondary coil control
The configuration of the tapped secondary coil transformer can be represented by Figure 2.1.In this type of transformer， a set of taps are installed in the secondary winding coil. By choosing different tapes， the number of turns in the secondary winding can be changed， which will directly adjust the output volt－current characteristics for a proper welding condition.Reducing the secondary turns decreases the open circuit voltage and increases welding current.Tapped secondary coil transforms are cheap and the most widely used welding power supplies.
（2） Movable－Coil Control
In a movable－coil transform， both primary and secondary coils are located on an elongated metal core.On the core，one of the coils is fixed，while the other coilis movable.For most cases，the position of secondary coilis fixed.The primary coil is normally attached on a movable component， therefore， the coil can be adjusted to move closer or farther away from the secondary coil.
Changing the distance between the primary and secondary coil adjusts the inductive coupling between the two coils. When the two coils are farther apart， the output voltage－current curve becomes more vertical， resulting a smaller maximum short－circuit current value. Conversely， when the coils are closer， a larger maximum short－circuit current and a flatter voltage－current curve are obtained.