中国机械工程
中國機械工程
중국궤계공정
China Mechanical Engineering
2015年
21期
2952-2957
,共6页
连铸%连续矫直%应变%应变速率
連鑄%連續矯直%應變%應變速率
련주%련속교직%응변%응변속솔
continuous casting%continuous straightening%strain%strain rate
根据国内外近年来高温铸坯蠕变规律研究成果，建立了矫直区内铸坯变形的数学模型，由此推导出矫直区内铸坯连续矫直曲线方程。辊列按照该矫直曲线布置，完全满足高温铸坯蠕变变形规律。矫直区内的铸坯在中间段实现了等应变速率变化规律，起始段和末尾段实现幂函数形式的应变速率变化规律。利用实验辊列装置对该矫直曲线进行了实验研究，采用一种常温完全蠕变锡铋合金代替高温铸坯，对实验铸坯所受矫直力与铸坯应变进行测量，所测结果与理论计算结果相吻合。
根據國內外近年來高溫鑄坯蠕變規律研究成果，建立瞭矯直區內鑄坯變形的數學模型，由此推導齣矯直區內鑄坯連續矯直麯線方程。輥列按照該矯直麯線佈置，完全滿足高溫鑄坯蠕變變形規律。矯直區內的鑄坯在中間段實現瞭等應變速率變化規律，起始段和末尾段實現冪函數形式的應變速率變化規律。利用實驗輥列裝置對該矯直麯線進行瞭實驗研究，採用一種常溫完全蠕變錫鉍閤金代替高溫鑄坯，對實驗鑄坯所受矯直力與鑄坯應變進行測量，所測結果與理論計算結果相吻閤。
근거국내외근년래고온주배연변규률연구성과，건립료교직구내주배변형적수학모형，유차추도출교직구내주배련속교직곡선방정。곤렬안조해교직곡선포치，완전만족고온주배연변변형규률。교직구내적주배재중간단실현료등응변속솔변화규률，기시단화말미단실현멱함수형식적응변속솔변화규률。이용실험곤렬장치대해교직곡선진행료실험연구，채용일충상온완전연변석필합금대체고온주배，대실험주배소수교직력여주배응변진행측량，소측결과여이론계산결과상문합。
According to the recent study results of the creep behavior of metal at elevated temperG ature,a mathematical model of the strand deformation was developed and a continuous straightening curve was derived.The rollers were arranged along the curve,making the roll apron fully accommoG date the creep behavior of metal at elevated temperature.Then the strand deformation features were presented.During the straightening process,the strain rates of the strand remained constant in the middle part of the straightening zone;while at the start and the end parts of the straightening zone, the strain rates of the strand were in the form of power function.Finally,an experimental research on the curve was carried out using a pilot roll supporting system.And the experimental material was a kind of Sn??Bi alloy to substitute the steel at elevated temperature.During the experimental process, the bending forces acting on the strand and the strains of the strand were measured.And the measureG ment results are in good agreement with the theoretical calculations.
