连铸连轧非调质钢的强度计算及其预报

金属学报

2004, Vol. 40

Issue (12): 1248-1252

论文

本期目录 | 过刊浏览

连铸连轧非调质钢的强度计算及其预报

刘志林;刘伟东;林成

辽宁工学院材料与化学工程学院; 锦州 121001

STRENGTH CALCULATION AND ITS PREDICTION OF NON QUENCHED-TEMPERED STEEL DURING CONTINUOUS CASTING-ROLLING

LIU Zhilin; LIU Weidong; LIN Cheng

Department of Materials and Chemical Engineering; Liaoning Institute of Technology; Jinzhou 121001

引用本文:

刘志林; 刘伟东; 林成 . 连铸连轧非调质钢的强度计算及其预报[J]. 金属学报, 2004, 40(12): 1248-1252 .
, , . STRENGTH CALCULATION AND ITS PREDICTION OF NON QUENCHED-TEMPERED STEEL DURING CONTINUOUS CASTING-ROLLING[J]. Acta Metall Sin, 2004, 40(12): 1248-1252 .

全文: PDF(176 KB)

摘要: 非调质钢的强度为α-Fe基体细化强度与固溶强化、奥氏体析出碳化物弥散强化、界面强化和过饱和铁素体析出碳化物的析出强化的强度增量之和. 以细晶铁素体强度为基础, 利用相最强键上的共用电子数nA及相界面电子密度差Δρ 计算了连铸连轧非调质钢固溶强化、界面强化、弥散强化和析出强化的强度增量. 给出了一组计算非调质钢连铸连轧终轧强度的公式. 可根据化学成分和工艺规定的终轧晶粒尺寸计算终轧强度, 或根据技术要求的强度给出相应的轧制晶粒尺寸与化学成分间的最佳组合. 实现了化学成分-轧制晶粒尺寸-终轧强度的计算机预报.

关键词 ：连铸连轧, 非调质钢, 电子结构

Abstract：The strength of non quenched-tempered steel consists of the strength of fine-grained α-Fe matrix, solution-strengthening, interface-strengthening, dispersion-strengthening (carbides from austenite), and separation-strengthening (carbides from oversaturated ferrite). Based on the strength of α-Fe matrix, the strengthening increments of the above four mechanisms are respectively calculated with the electron number nA on the strongest bond in alloying phase and electron density difference Δρ on biphase interface. A set of strength calculated equations is proposed with the strengthening factors and the weights of C and alloying elements (M) in non quenched-tempered steel, and used in calculation of the end-rolled strength of non quenched-tempered on the basis of composition and the grain size after rolling. In opposition, the optimization between composition and the grain size can be accomplished on the strength proposed by technical standard. So, the end-colled strength prediction from composition, and grain size can be carried out.

Key words： continuous casting-rolling non quenched-tempered steel valence electron structure

收稿日期: 2003-11-17

ZTFLH:

TG113.25

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