Improving the Controlled Cooling after Wire Rod Rolling in the Finishing Block of Stands

Abstract

The thermal regime of rolling in the finishing block of stands and the cooling path after rolling largely determines the mechanical properties of the wire rod. One of the main challenges that must be addressed in the cooling design phase is reduction of temperature non-uniformity over the cross section of a wire rod. The use of adjustable cooling allows getting closer in finishing rolling mill to the regimes of the controlled rolling, thermo mechanical processing and two-phase rolling, which greatly extend the capabilities of the mill in the obtaining of high consumer properties of products. The paper presents the theory and experimental analysis of controlled cooling after rolling in the finishing rolling mill, with the aim to rise temperature heterogeneity over the cross section of the wire rod.

Force Analysis and Curve Design for Laying Pipe in Loop Laying Head of Wire Rod Mills

“…The wire rod passing through the laying pipe can be seen composed by limited sectional rod units, each rod unit is assumed as a straight rod. Each of the straight rod has its unique position in the laying pipe and the divided sectional (12)…”

“…The speed relationship between laying head and rolling mill is presented in Ref. [12] for control. Fiorucci tried different materials used for laying pipe in Refs.…”

Investigation of Temperature-Time Modes of Rolling of Thick-Sheet Steel and Mechanical Properties of Finished Products

“…An important condition for achieving compliance with the properties of the product to customer requirements in the production of high-quality steels, including tube steels is observance with thermo mechanical regimes throughout the mill line. For example, the formation of the required grain size of austenite and the separation of niobium and vanadium carbonitrides require strict adherence to temperature and mode of the thickness reduction over the passes [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

The Mechanical Properties of the Pipe Steel after Rolling at the Plate Mill

“…The strength characteristics include tensile strength σв and yield stress σ02, the characteristics of plasticity -relative elongation δ and relative necking ψ. When mechanic machining and heat treatment for various reasons, these characteristics are varied widely [1][2][3][4]. It is well known that in majority, there is an inverse relationship between strength and plasticity.…”