CAJ | 학술논문

采用金相观察、透射电镜、化学相分析、XRD织构检测及性能测试等手段分析了FTSR铁素体区轧制工艺生产的SPHE热轧板的微观组织及力学件能,探讨了一种生产SPCE级深冲用钢冷轧基板的新思路.研究结果表明:热轧态组织为粗大而不均匀的铁素体,晶粒沿轧向伸长,组织中有较多细小的析出粒子和高密度位错,有利于冲压性能的{111}织构较弱,但各种类型的织构分布相对较均匀;SPHE热轧板的性能水平:σ_(0.2)为220MPa,σ_b为290 MPa,伸长率δ为37.5%,n值为0.20.
채용금상관찰、투사전경、화학상분석、XRD직구검측급성능측시등수단분석료FTSR철소체구알제공예생산적SPHE열알판적미관조직급역학건능,탐토료일충생산SPCE급심충용강랭알기판적신사로.연구결과표명:열알태조직위조대이불균균적철소체,정립연알향신장,조직중유교다세소적석출입자화고밀도위착,유리우충압성능적{111}직구교약,단각충류형적직구분포상대교균균;SPHE열알판적성능수평:σ_(0.2)위220MPa,σ_b위290 MPa,신장솔δ위37.5%,n치위0.20.
The microstructure and properties of SPHE hot rolled sheets produced by ferrite rolling using FTSR were studied by means of metallographic observation, TEM, chemical phase analysis, XRD texture measurement and property testing. The results show that the hot rolling microstructure is coarse and inhomogeneous ferrite, and the grains stretch along the rolling direction, there exists a huge amount of secondary phase precipitates and high density dislocations, the {111} texture which is favorable to tensile properties is weak, however, the texture distribution of each type is relatively uniform. The properties of SPHE holt rolled sheets are as follows: σ_(0.2)=220 MPa, σ_b=290 MPa, δ=37.5% and n=0.20.