Abstract A series of ring compression tests using BS970:708M40 alloy steel samples were studied. These conducted a 2-factor soak-temperature variable, namely 1030 °C and 1300 °C, 4-factor lubricant variable consisting unlubricated samples, synthetic water-based, graphite molybdenum disulphide viscous grease. The agents all applied to the tool/billet interface. Process variables such as blow for...

The paper shows an algorithm for determining the load on electric motor of run-out conveyor starting from determination first moment no operation during slab conveying, slipping torque rollers along surface conveyed billet and ending with choice motor. It also covers strength calculations roller, which includes calculation moments forces acting roller its supports, static torsion strength, defl...

This study investigates a novel changing channel angular (CCA) extrusion process, in which high strains are induced within the billet by passing it through a series of channels of unequal cross-sections arranged such that they form specified internal angles. Using commercial DEFORM 2D rigid-plastic finite element code, the plastic deformation behavior of CuZn37 brass alloy is examined during on...

Extrusion is one of the widest used and the most basic processes of plastic forming, and the metal flow in extrusion is affected by many factors, such as friction, die shape, billet temperature and so on. Among these factors, friction is the key boundary condition to determine the property of the extruded products. In this paper research and measurements of velocity fields and impact of frictio...

This paper builds a soft sensor model based on a PSO-BP neural network for titanium billet heating furnace-temperature. An improved particle swarm optimization algorithm is proposed. This algorithm is used to optimize the initial weights of the neural network, which can overcome the disadvantages of the random initial weights of the conventional BP neural networks. The proposed algorithm is bas...

Severe competition in US steel industry urges quality improvements in hot rolling processes. Surface defects have been a long-standing troubling issue in hot rolling processes due to the ineffectiveness of existing detection methods. This paper presents an advanced statistical analysis method to identify the impacting factors in surface defects of hot rolling processes. The surface defects on t...