球墨铸铁附铸试块的力学性能与金相组织
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=1><TBODY>
<TR>
<TD width="14%">
<DIV align=center>牌号</DIV></TD>
<TD width="14%">
<DIV align=center>铸件壁厚</DIV>
<DIV align=center>/mm</DIV></TD>
<TD width="14%">
<DIV align=center>抗拉强度</DIV>
<DIV align=center>σ<SUB>b</SUB>≥/MPa</DIV></TD>
<TD width="15%">
<DIV align=center>屈服强度</DIV>
<DIV align=center>σ<SUB>0.2</SUB>≥/MPa</DIV></TD>
<TD width="13%">
<DIV align=center>伸长率</DIV>
<DIV align=center>δ<SUB>5</SUB>≥(％)</DIV></TD>
<TD width="14%">
<DIV align=center>硬度</DIV>
<DIV align=center>HBS</DIV></TD>
<TD width="14%">
<DIV align=center>主要金相组织</DIV></TD></TR>
<TR>
<TD width="14%">
<DIV align=center>QT400-18A</DIV></TD>
<TD width="14%">
<DIV align=center>>30~60</DIV>
<DIV align=center>>60~200</DIV></TD>
<TD width="14%">
<DIV align=center>390</DIV>
<DIV align=center>370</DIV></TD>
<TD width="15%">
<DIV align=center>250</DIV>
<DIV align=center>240</DIV></TD>
<TD width="13%">
<DIV align=center>18</DIV>
<DIV align=center>12</DIV></TD>
<TD width="14%">
<DIV align=center>130~180</DIV></TD>
<TD width="14%">
<DIV align=center>铁素体</DIV></TD></TR>
<TR>
<TD width="14%">
<DIV align=center>QT400-15A</DIV></TD>
<TD width="14%">
<DIV align=center>>30~60</DIV>
<DIV align=center>>60~200</DIV></TD>
<TD width="14%">
<DIV align=center>390</DIV>
<DIV align=center>370</DIV></TD>
<TD width="15%">
<DIV align=center>250</DIV>
<DIV align=center>240</DIV></TD>
<TD width="13%">
<DIV align=center>15</DIV>
<DIV align=center>12</DIV></TD>
<TD width="14%">
<DIV align=center>130~180</DIV></TD>
<TD width="14%">
<DIV align=center>铁素体</DIV></TD></TR>
<TR>
<TD width="14%">
<DIV align=center>QT500-7A</DIV></TD>
<TD width="14%">
<DIV align=center>>30~60</DIV>
<DIV align=center>>60~200</DIV></TD>
<TD width="14%">
<DIV align=center>450</DIV>
<DIV align=center>420</DIV></TD>
<TD width="15%">
<DIV align=center>300</DIV>
<DIV align=center>290</DIV></TD>
<TD width="13%">
<DIV align=center>7</DIV>
<DIV align=center>5</DIV></TD>
<TD width="14%">
<DIV align=center>170~240</DIV></TD>
<TD width="14%">
<DIV align=center>铁素体＋珠光体</DIV></TD></TR>
<TR>
<TD width="14%">
<DIV align=center>QT600-3A</DIV></TD>
<TD width="14%">
<DIV align=center>>30~60</DIV>
<DIV align=center>>60~200</DIV></TD>
<TD width="14%">
<DIV align=center>600</DIV>
<DIV align=center>550</DIV></TD>
<TD width="15%">
<DIV align=center>360</DIV>
<DIV align=center>340</DIV></TD>
<TD width="13%">
<DIV align=center>3</DIV>
<DIV align=center>1</DIV></TD>
<TD width="14%">
<DIV align=center>180~270</DIV></TD>
<TD width="14%">
<DIV align=center>珠光体＋铁素体</DIV></TD></TR>
<TR>
<TD width="14%">
<DIV align=center>QT700-2A</DIV></TD>
<TD width="14%">
<DIV align=center>>30~60</DIV>
<DIV align=center>>60~200</DIV></TD>
<TD width="14%">
<DIV align=center>700</DIV>
<DIV align=center>650</DIV></TD>
<TD width="15%">
<DIV align=center>400</DIV>
<DIV align=center>380</DIV></TD>
<TD width="13%">
<DIV align=center>2</DIV>
<DIV align=center>1</DIV></TD>
<TD width="14%">
<DIV align=center>220~320</DIV></TD>
<TD width="14%">
<DIV align=center>珠光体</DIV></TD></TR></TBODY></TABLE>
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