thanР80%,andtheareareductionrateofthesteelreachesaminimumvalueof55.45% at790 ℃.There-Рfore,inactualindustrialproduction,thecontinuouscastingtemperatureandhotrollingtemperatureРshouldnotbeinthistemperaturerange.Inthetemperaturerangeof850~1200 ℃,thesteelshowsРbetterthermoplasticperformance,andtheareareductionratesallexceed86%.Inaddition,thetensileРstrengthofthesteeldecreaseswiththeincreaseofhottensiletemperature,andthemaximumtensileРstrengthisobtainedat760 ℃,whichis175 MPa.Р KeywordsР :Fe-Mn-Al-Clow-densitysteel;thermoplasticity;fracture morphology;tensilestrength;Рareareductionrate;tensiletemperatureРР [责任编辑 董 贞]
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