HPB300热轧光圆钢筋盘条的控轧控冷工艺优化

摘要

In order to give full play to the equipment capacity of controlled rolling and controlled cooling, the controlled rolling and controlled cooling process was optimized, the inlet temperature of finishing mill and reducing sizing mill and laying head were reduced, narrowing the temperature variation range and strengthen the air-cooling intensity. The microstructure of the product is F+P and grain size is fine and uniform, the minimum yield strength is 315 MPa and tensile strength is 500 MPa, all indexes can meet the requirements of national standards, the HPB300 hot rolled round steel wire head and tail shearing loss were reducd, the economic benefit was improved.%为充分发挥设备的控轧、控冷能力,优化控轧控冷工艺,将精轧入口温度、减定径入口温度、吐丝温度降低,温度变化范围控窄并加大了风冷强度.产品组织为F+P,晶粒均匀细小,最低屈服强度315 MPa,抗拉强度500 MPa,各项指标符合国家标准要求,减少了HPB300热轧光圆钢筋盘条头尾剪切损失,提高了经济效益.