中国重型装备
中國重型裝備
중국중형장비
CHINA HEAVY EQUIPMENT
2013年
3期
40-41
,共2页
30MnSi%拉拔断裂%卷渣%局部增碳%结疤
30MnSi%拉拔斷裂%捲渣%跼部增碳%結疤
30MnSi%랍발단렬%권사%국부증탄%결파
30MnSi%drawing fracture%entrapped slag%local carburetion%scar
30MnSi在拉拔刻槽过程中出现断裂现象，通过宏观形貌观察、化学成分、金相分析以及扫描电镜微区分析，得出：连铸坯皮下卷渣及局部增碳造成热轧母材表面结疤，在后期拉拔过程中以结疤缺陷为裂纹源产生断裂。
30MnSi在拉拔刻槽過程中齣現斷裂現象，通過宏觀形貌觀察、化學成分、金相分析以及掃描電鏡微區分析，得齣：連鑄坯皮下捲渣及跼部增碳造成熱軋母材錶麵結疤，在後期拉拔過程中以結疤缺陷為裂紋源產生斷裂。
30MnSi재랍발각조과정중출현단렬현상，통과굉관형모관찰、화학성분、금상분석이급소묘전경미구분석，득출：련주배피하권사급국부증탄조성열알모재표면결파，재후기랍발과정중이결파결함위렬문원산생단렬。
PC steel bar made from 30MnSi occurred breakup phenomenon during drawing and grooving process .By adopting a succession of macro appearance observation , chemical composition , metallurgical analysis and scanning e-lectron microscope microzone analysis , it was concluded that entrapped slag under the surface and local carburetion of continuous casting blank resulted in surface scar of hot rolled base material , further the scar defect was the crack origin to form fracture in later drawing process .
