合金的电阻率及其温度系数
<p><CENTER><TABLE borderColor=#202380 height=327 cellSpacing=1 cellPadding=7 width="86%" align=center border=1><TBODY><TR><TD vAlign=center align=middle width="16%" bgColor=#c0c0c0 height=35><STRONG>名称</STRONG></TD><TD vAlign=center align=middle width="14%" bgColor=#c0c0c0 height=35><STRONG>主要成分%</STRONG></TD><TD vAlign=center align=middle width="20%" bgColor=#c0c0c0 height=35><STRONG>电阻率(20℃)</STRONG></TD><TD vAlign=center align=middle width="19%" bgColor=#c0c0c0 height=35><STRONG>电阻温度系数℃<SUP>-1</SUP></STRONG></TD><TD vAlign=center align=middle width="15%" bgColor=#c0c0c0 height=35><STRONG><SUP>最高工作温度</SUP><BR>T/℃</STRONG></TD><TD vAlign=center align=middle width="17%" bgColor=#c0c0c0 height=35><STRONG>特点</STRONG></TD></TR><TR><TD vAlign=center align=middle width="16%" height=16>康铜</TD><TD vAlign=center align=middle width="14%" height=16>Ni39~41<BR>Mnl~2<BR>Cu余量</TD><TD vAlign=center align=middle width="20%" height=16>0.48</TD><TD vAlign=center align=middle width="19%" height=16>≈50</TD><TD vAlign=center align=middle width="15%" height=16>500</TD><TD vAlign=center align=middle width="17%" height=16>抗氧化性能好</TD></TR><TR><TD class=9p vAlign=center align=middle width="16%" height=16>新康铜</TD><TD class=9p vAlign=center align=middle width="14%" height=16>Mn10.8~12.5<BR>Al2.5~4.5<BR>Fe1.0~1.6<BR>Cu余量</TD><TD vAlign=center align=middle width="20%" height=16>0.48</TD><TD vAlign=center align=middle width="19%" height=16>≈50</TD><TD vAlign=center align=middle width="15%" height=16>500</TD><TD vAlign=center align=middle width="17%" height=16>抗氧化性能比康铜差价格廉</TD></TR><TR><TD class=9p vAlign=center align=middle width="16%" height=16>镍铬</TD><TD class=9p vAlign=center align=middle width="14%" height=16>Cr20~23<BR>Ni余量</TD><TD vAlign=center align=middle width="20%" height=16>1.09</TD><TD vAlign=center align=middle width="19%" height=16>≈70</TD><TD vAlign=center align=middle width="15%" height=16>500</TD><TD vAlign=center align=middle width="17%" height=16>焊接性能较差</TD></TR><TR><TD class=9p vAlign=center align=middle width="16%" height=16>镍铬铁</TD><TD class=9p vAlign=center align=middle width="14%" height=16>Cr15~18<BR>Ni55~61<BR>Fe余量</TD><TD vAlign=center align=middle width="20%" height=16>1.12</TD><TD vAlign=center align=middle width="19%" height=16>≈150</TD><TD vAlign=center align=middle width="15%" height=16>500</TD><TD vAlign=center align=middle width="17%" height=16>焊接性能较差</TD></TR><TR><TD class=9p vAlign=center align=middle width="16%" height=1>铁铬铝</TD><TD class=9p vAlign=center align=middle width="14%" height=1>Cr12~15<BR>Al3.5~5.5<BR>Fe余量</TD><TD vAlign=center align=middle width="20%" height=1>1.26</TD><TD vAlign=center align=middle width="19%" height=1>≈120</TD><TD vAlign=center align=middle width="15%" height=1>500</TD><TD vAlign=center align=middle width="17%" height=1>焊接性能较差</TD></TR></TBODY></TABLE></CENTER></p>
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