Development of ultra-fine grained dual phase microalloyed steels through severe cold rolling and intercritical annealing

被引：3

作者：

Mondi, Papa Rao ^{[1
]}

Sarma, V. Subramanya ^{[1
]}

Sankaran, S. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

来源：

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2011年 / 64卷 / 1-2期

关键词：

microalloyed steel; ultra-fine grains; cold rolling and annealing; dual phase steels; SEVERE PLASTIC-DEFORMATION; BONDING ARB PROCESS; LOW-CARBON STEEL; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; IF STEEL; STRAIN; MARTENSITE; BEHAVIOR; MICROSTRUCTURE;

D O I：

10.1007/s12666-011-0018-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A Nb-microalloyed structural steel with ferrite-pearlite microstructure was subjected to cold rolling and intercritical annealing to produce ultrafine grained dual phase microstructure. Optical and transmission electron microscopy techniques were employed to characterise the microstructure. Initial results showed that the intercritical annealing (at 790 degrees C for 90s) of samples rolled to a true strain of 2.4 resulted in a significant grain refinement from the average initial grain size of 20 mu m to 1-2 microns. The microstructure primarily consisted of UFG ferrite matrix with homogeneously distributed islands of plate martensite with volume fraction of 27%.

引用

页码：89 / 92

页数：4

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