effect+of+eeeding+ca-mg-re-zr+composite+cored+wire+during+refining+of+liquid+steel+on+abrasive+wear+resistance+and+weldability+of+high—strength+steels

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1、IVWuhanUniversityofScienceandTechnology2．5．2Pinningeffectandgrainrefinementbyfeedingcompositecoredwire⋯⋯⋯⋯⋯⋯⋯⋯．192．6Conclusions．．．．．．⋯⋯⋯．⋯．．．．．．．．．．．⋯⋯⋯．．．．．．⋯．．．⋯⋯⋯．．．．．．⋯⋯⋯⋯．⋯⋯⋯⋯．⋯⋯．．．．．．．．．．．．⋯⋯⋯．．．．．．20Chapter3AbrasiveWearResistanceofHigh-strengthSteels⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．213．1Introduct

2、ion⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．213．2Stirringweal"test⋯．．．⋯⋯⋯⋯．⋯．．⋯⋯⋯⋯⋯．．⋯．⋯．⋯⋯⋯．．．．．⋯⋯⋯⋯⋯．．．⋯．．⋯⋯⋯⋯．⋯⋯．．．．．．⋯⋯213．2．1Samplesandapparatus⋯．．⋯．．．．．⋯⋯⋯⋯．．．．．．⋯⋯⋯．．．．．．．．．．．．⋯⋯⋯⋯．．．．．．⋯⋯．．⋯⋯⋯．．．．．．⋯．．223．2．2Stirringweal"testprocess⋯．．．．．．．．．．．⋯⋯⋯．．．．⋯．．．．．⋯⋯⋯⋯．．．．．．⋯⋯⋯．⋯⋯．．．⋯．

3、⋯⋯⋯⋯⋯⋯233．2．3Results⋯⋯．．．．．．⋯⋯⋯⋯．⋯．．⋯．．．．．⋯．⋯⋯⋯．．．．．⋯⋯⋯⋯⋯．．⋯．．．．⋯．⋯⋯⋯⋯⋯⋯．⋯⋯⋯⋯．⋯．．．．233．3Slidingabrasiontest．⋯⋯⋯⋯．．．．．。⋯⋯⋯⋯⋯⋯⋯。。。。⋯⋯⋯⋯⋯⋯⋯。⋯⋯⋯⋯。．。．．．⋯．．．．．⋯⋯⋯．⋯．．．⋯．253．3．1Samplesandapparatus⋯．⋯⋯⋯⋯⋯．．．⋯．⋯．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．⋯⋯253．3．2Slidingabrasiontestprocess⋯．．．．．⋯．．．．⋯⋯⋯⋯．．．．⋯．⋯⋯⋯⋯⋯⋯⋯

4、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯263．3．3Results⋯．⋯．⋯．⋯⋯．⋯⋯．．．．⋯⋯⋯⋯⋯．．．．．．．⋯⋯⋯⋯．．．．．．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯273．4Discussion⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．283．5Conclusions．⋯⋯⋯．．．．．．．．．．．⋯⋯．⋯⋯．⋯．．．．．．．⋯．．．．．⋯⋯．⋯⋯．．．．．⋯⋯．．⋯⋯⋯⋯．．．．．．⋯．．．．．．．．．．．．⋯⋯⋯⋯．30Chapter4WeidabilityofHigh—strengthSteels⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

5、．⋯⋯⋯⋯⋯⋯⋯⋯⋯314．1Introduction⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．314．2Calcuiationofcarbonequivalentandcracksensitivity⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．3243、则reldingtest⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一334．3．1Protectivegasselection⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．334．3．2Weldingwireandwe

6、ldingplatesize⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．334．3．3Mixedgasshieldedarcweldingprocess⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．344．4Microstructuresoftheweldingioint⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯354．4．1Microstructuresoftheweldmetal⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯364．4．2MicrostructuresoftheCGHAz⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯．374．4。3MicrostructurcsoftheFGHAZ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．374．4．4MjcrostructuresoftheICHAZ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一384．4．5Microstructuresoftheweldingtemperedzone．．⋯⋯⋯⋯．⋯⋯⋯⋯．⋯．，．⋯⋯．⋯⋯⋯⋯．⋯⋯．404．5Mechanicalpropertytests⋯⋯⋯⋯⋯⋯．⋯⋯．⋯．．．⋯．．⋯⋯．．⋯⋯⋯⋯．⋯⋯⋯⋯．⋯⋯⋯⋯．⋯⋯⋯⋯．⋯．．．．404．