卷取后不同冷却方式对SPHC热轧钢卷力学性能的影响

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EFFECTOFCOOLINGMETHODONMECHANICAL PROPERTIESOFSPHCHOT-ROLLEDSTEELCOIL

Wang Xilong1Yu Liwei²Cheng Chunyu1 （1.Manufacturing Management Centerof Ben Gang Group Corporation，Benxi117Ooo，China;2.Technical Centerof Ben Gang Group Corporation， Benxi117Ooo，China）

Abstract：This study explores the phenomenon of performance differences in SPHC hot-rolled steel coils from the samebatchand processed using thesame hot-roling technique.Itisfoundthatdiferent cooling methods （pilecoils slow cooling andaircoling）aftercoiling are the main factors affcting performance.Through mechanical propertytesting and metallographic structureanalysis of steel coilssubjected todiferent cooling methods aftercoiling，theresults indicate thattheaverageyieldstrengthof thepilecoilsslowcooling steelcoilis272.4MPa，andtheaverage tensilestrength is 332.8 MPa; forthe aircooling stelcoil，the average yield strength is3O7.9 MPa，and theaverage tensile strength is 354.1 MPa.The ferrite grain sizeof thepilecoils slowcooling steelcoil is grade8，while thatoftheaircooling steel coil is grade9.Thestudyrevealsthatdiferentcolingmethodsaffectgraingrowthbehavior，whichisthefundamentalreason for the differences in mechanical properties.

Key words： SPHC steel; cooling rate; grain size; property uniformity

0引言

在钢铁企业竞争日益激烈的今天，其性能的均匀性与稳定性已成为衡量企业核心竞争力的关键指标。（剩余2667字）