離心鑄造大直徑復(fù)合定徑輥的開裂原因分析

Analysis of Cracking of Centrifugally-cast Large-sized Composite Sizing Roll

摘要: 從結(jié)構(gòu)設(shè)計、生產(chǎn)特點和離心鑄造過程等方面，對離心鑄造大直徑復(fù)合定徑輥的開裂原因進(jìn)行了分析，同時應(yīng)用磁測法對離心鑄造過程中產(chǎn)生的應(yīng)力及其分布情況進(jìn)行檢測。根據(jù)分析結(jié)果，通過改善結(jié)構(gòu)設(shè)計、規(guī)范操作過程和控制球化孕育質(zhì)量，提高定徑輥的內(nèi)層強(qiáng)度，降低鑄造應(yīng)力，以解決該定徑輥的開裂問題。

Abstract: The causes for cracking of the large-sized centri fugally-cast composite sizing roll are analyzed, involving such factors as structure design, production characteristics and centrifugal casting process, etc. And the stress as resulting from the centrifugal casting process and the distribution thereof are measured with the magnetic measurement method. Based on the analysis result, it is proposed to solve the cracking problem of the said sizing roll by means of improving structure design of the roll, regulating the roll operation procedure, control quality of spheroidization and inoculation, enhancing the roll inner layer strength, and reducing casting stress.