摘要
介绍了采用20MnSi生产超细晶粒HRB400(Ⅲ级)小规格热轧带肋钢筋的冶炼及轧制试验工艺。冶炼时完全取消钒氮合金,适当调整了碳当量,采用超细晶粒工艺轧制。检验结果表明,试制的钢筋化学成分均匀,强度高,塑性、韧性、焊接性能良好,无应变时效,强屈比1.35～1.45,晶粒度10～12级,完全符合GB1499-1998要求。
Introduces the testing processes of small diameter hot-rolled ribbed bar HRB400 （ Ⅲgrade） with ultra-fine grain and the process of zero V-alloy addition and controlled roiling and cooling. In the course of steel smelting, the content of the alloy element “V” was deceased from 0.02% to 0% ,the carbon equivalent was adjusted properly and in the course of rolling, the rolling temperature of the each pass was strictly designed and the cooling rate was raised on base of the theory of deformation induced ferrite transformation. Subsequent to the designing, the ribbed bar was tested to roll through the high-speed wire mill strand. The experimental result showed that the ribbed bar have a good intensive effect, the components are even, welding performance is excellent, the effect of strain do not occur,the intensity to yield strength radio is 1.35 - 1.45, grain fineness is 10 - 12grade, and the mechanical,technology and microstructure of the ribbed bar are according to the standard of GB1499-1998.
出处
《山东冶金》
CAS
2005年第4期14-16,共3页
Shandong Metallurgy
