A Study on Hot Ductility of Q235B Steel Thin Slab;

Gleeble-1500 was used to test the hot ductility of rolled medium-carbon 45 steel bars from continuously cast billets with sulphur contents of 0.

This paper describes comprehensively the hot ductility of Nb-bearing microalloyed steel in different temperature range.

A kind of technology which can improve the mechanical properties and high temperature plasticity of MoSi 2 heating element was introduced by means of synthesis of MoSi 2,size of powder, additive and sintering.

The slabs with these cracks were analyzed by means of high temperature plasticity,macrostructure,microstructure and inclusion test.

365, the high temperature ductility and stress rupture life were reduced because large MC films, dendritic flake M6C and fine M23C6 films precipitated at grain boundaries.

Contrary to be crack sources and make mechanical properties of alloys deteriorate as it has been always considered, η phase was found to have little effect on room temperature properties and furthermore, it improved the high temperature ductility of the alloy via blocking the grain boundary slip due to it.

The results show that the intracrystalline absorption of oxygen and phosphorus dueto the segregation of element B on the grain boundary is restrained and the properties on thegrain boundary as well as the high-temperature plasticity of the steel are imp.

The results show that the high-temperature plasticity of low-carbon steel with γ→γ+α→γ thermal history is the worst of all.

Comparison and analysis on high temperature ductility of high quality pipeline steel;