By mandrel reaming method, hollow billet thickness is reduced to the certain thickness of cylindrical forging, then after longitudinal split and flattening process, flat forging with the ideal size is completed.

How to produce high quality large-diameter hollow billet to satisfy the requirements of succeeding treatment is the key to acquire the high quality large-diameter hollow tube.

如何生产优质的大口径管坯，使其满足后续加工要求，是获得高质量大口径管材的技术关键。

The influence of commercial frequency electromagnetic field on the surface quality, mechanical properties and macrostructure of copper hollow billet prepared by horizontal continuous casting method was investigated.

研究了工频电磁场对水平连铸紫铜管坯表面质量、力学性能和组织的影响。

ANSYS software is used to compute the influence of rotate magnetic filed on the solidification of clad hollow billet.

采用ANSYS软件模拟旋转磁场对管坯凝固过程的影响。

The unit pressure in backward extruding hollow billet has been calculated by the slip line method and the upper bound method.

本文对空心件反挤的单位挤压力，采用滑移线法和上限法进行了计算。

Study on soft-contact electromagnetic continuous casting of hollow billet

空心管坯软接触电磁连铸技术研究

By controlling the cooling speed of pierced billet after hot piercing, the DP-structure F+ B could be obtained. The times of annealing the process of cold, drawing could be decreased by 50%.

控制热穿孔后荒管的冷却速度可获得F＋B的双相组织，并减少冷拔过程中50%的退火次数。

Hot-shear blade is the main tool which is used to cut hot rolling steel billet. Its performance directly affects the quality of continuous metal casting billet.

热剪刃是钢厂用来切断热轧钢坯的主要工具，其性能直接影响到连铸钢坯的质量。

Significant improvements in output capacity and in conversion costs are achieved when rolling a billet of infinite length obtained.

当轧制一根由许多钢坯焊成的无限长钢坯时，就会大大地提高产量、降低成本。

Simulation Experiment of Rolling Square Billet with Liquid Core Using Four Stand Continuous Rolling Mill

采用四机架连轧带液芯方坯的模拟实验

The forming limit of forward extrusion and cross rolling tube billet

管坯正挤&横轧的成形极限

In hot-rolled production line, rolling billet heating softened, the roller into the mill, finally rolling into the size of user requirements.

在热轧生产线上，轧坯加热变软，被辊道送入轧机，最后轧成用户要求的尺寸。

This paper presents the application of photoelectric switches to the on line measurement of the length of a hot rolling billet.

本文介绍了光电开关在热轧钢坯长度在线检测中的应用。

Lateral spreading model of rolling billet in oval pass

方坯在椭圆孔型中轧制的宽展模型

Study on Model for Rebuilding the Temperature and the Surface Heat Flux of the Billet Steel in an Industrial Furnace

工业炉内钢坯温度及表面热流重建模型研究

Purity problem of round billet steel was solved by optimizing parameter of tundish.

天津钢管公司对电弧炉和连铸机进行了高效化改造，通过优化中间包参数，解决了高拉速下连铸圆坯钢液的纯净度问题；

Analysis and Countermeasure of Plate Hook Bend Caused by Billet Steel Skid Mark

钢坯滑道黑印造成钢板镰刀弯问题的分析与对策

Cause analysis for cracks in 20# hot rolled pipe billet steel and improving measures

20热轧管坯用钢裂纹成因分析及改进措施

Application of static soft reduction technology on high carbon billet caster

静态轻压下技术在高碳连铸方坯生产中的应用

Automation System& Control Technology of High Efficient Billet Caster

高效方坯连铸机自动化系统及控制技术

The quality check mode of No.4 billet caster has been introduced, and the innovative approaches for problems existing in the check have been put forward.

介绍了4号方坯连铸机铸坯质量检验的模式，并对检验过程中存在问题提出改进措施。