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对Ｎｉ—Ｃｒ电热合金中残留钙的作用进行了研究，结果表明，含Ｃａ０．００１５％～０．００４５％时，合金热加工变形塑性好，成材率高．
The effect of residual calcium in Ni-Cr alloy was studied. The results show that when the content of Ca is 0.0015% to 0.0045%, the hot deformation and plasticity of the alloy are good and the yield rate is high.