河北冶金
河北冶金
하북야금
HEBEI METALLURGY
2015年
2期
53-55
,共3页
盘条%心部%马氏体%异常组织%分析
盤條%心部%馬氏體%異常組織%分析
반조%심부%마씨체%이상조직%분석
wire bar%core%martensite%unusual structure%analysis
针对宣钢生产的SWRH82B盘条，下游用户在拉拔过程中断丝率高的问题。对易断试样进行金相组织、显微硬度、电子探针显微成分分析，认为连铸坯中心Cr、Mn偏析是导致线材心部产生马氏体的主要原因，心部马氏体组织是线材拉拔过程中产生尖杯状断裂的原因之一，从化学成分和生产工艺方面分析了线材心部产生马氏体的原因，提出了相应的改进措施。
針對宣鋼生產的SWRH82B盤條，下遊用戶在拉拔過程中斷絲率高的問題。對易斷試樣進行金相組織、顯微硬度、電子探針顯微成分分析，認為連鑄坯中心Cr、Mn偏析是導緻線材心部產生馬氏體的主要原因，心部馬氏體組織是線材拉拔過程中產生尖杯狀斷裂的原因之一，從化學成分和生產工藝方麵分析瞭線材心部產生馬氏體的原因，提齣瞭相應的改進措施。
침대선강생산적SWRH82B반조，하유용호재랍발과정중단사솔고적문제。대역단시양진행금상조직、현미경도、전자탐침현미성분분석，인위련주배중심Cr、Mn편석시도치선재심부산생마씨체적주요원인，심부마씨체조직시선재랍발과정중산생첨배상단렬적원인지일，종화학성분화생산공예방면분석료선재심부산생마씨체적원인，제출료상응적개진조시。
To solve the problem of SWRH 82R wire bar produced by Xuan Steel:too high rate of break when drawn by its customers, the sample is analyzed in metallographic structure, micro hardness and electron mi-croprobe micro composition.It is considered that segregation of Cr and Mn in core of continuous casting bil-let is the main reason to produce martensite in core of wire, whereas the latter is one of reason to cause tip-cup-like break of wire in draw.It is analyzed the reason of martensite being brought about in core of wire in aspects of chemical composition and production process, some improving measures proposed.
