Development of Fine‐Grained High‐Carbon Steel in High Reduction Low Temperature Rolling

Abstract

After blanking and bending to form parts with the desired shape, high‐carbon steels are quenched and tempered to produce various machine parts. Thus, the spheroidization, formability and hardenability are very important properties for high‐carbon steels. Thermo‐Mechanical control Process of rolling has been widely used in the steel industry. However, it is difficult to apply this process to high‐carbon steels because of the heavy rolling load. Thus, fine‐grained high‐carbon hot strips were developed through high‐reduction and low‐temperature rolling by using single roll rolling mills with different diameters and laminar flow cooling devices in the finishing train, the grain size of these steels was about 3 microns. Also developed annealed strips with fine homogeneously dispersed spheroidal cementite had many excellent characteristics. For example, burring formability investigated by the hole‐expanding and surface hardness evaluated by laser hardening of the developed high‐carbon annealed steels, were excellent.

Preparation and Performance of Mo/Cu/Fe Multi-Layer Composite Coating with Staggered Spatial Structure by Electro-Explosive Spraying Technology

“…The bases of the material selection were as follows: (1) Molybdenum is a high-melting-point metal, and its molten particle temperature is high, which could increase the interaction temperature between the particle and the substrate and could prolong the interaction time, and it is conducive to the formation of the metallurgical bonding layer and has a high bonding strength with most metals. Therefore, it is often used as a bonding layer in composite coatings [ 30 ]; (2) High-carbon steel is a commonly used steel tool with high-cost performance. When the high-carbon steel droplets are rapidly cooled from the molten state, a dense martensitic structure is formed with high hardness and high strength, and it is often used as a wear-resistant material [ 31 , 32 , 33 , 34 ]; and (3) aluminum bronze has good mechanical properties, a high thermal conductivity, good fatigue resistance and good wear reduction and wear resistance, so it is an ideal material for manufacturing high-load and high-speed bearings.…”

Development of Recrystallization Texture Prediction Method Linking with Deformation Texture Prediction Model

“…method. 3,4) However, ultra low-carbon steels and ferritic stainless-steels have never been rolled in a tandem hot strip mill by this method. Three production techniques in the tandem hot strip mill have been reported to improve the formability of ultra lowcarbon steel.…”

Application of Recrystallization Texture Evolution Model to Type 430 Stainless-Steel Strip Production

“…24) Thus, to improve the antiridging properties, type 430 stainless-steels were hot rolled at a low temperature with a high reduction rate in an actual tandem hot strip mill, which has rolling stands with different diameters and laminar flow cooling devices in the final finishing stands. 5) The ridging phenomenon originates from casting colonies being formed as a result of crystal plasticity anisotropy. 69) Prediction of the antiridging properties required continuously analyzing the hot-rolling, hot-rolling and annealing, coldrolling, and cold-rolling and annealing textures.…”