铜对高硼铁基合金性能的影响

高硼铁基合金中由于硼的存在,加入的锰、铬等用来增加淬透性的元素大部分形成了硼化物,影响了材料的淬透性。而且由于高硼铁基合金中的硼化物导热性能不好,也会影响到材料的淬透性。本文通过添加铜来研究其提高材料淬透性的效果。铜在钢中的作用与镍类似,可以提高钢的淬透性,含量适当时可以提高钢的冲击韧度。在硼钢中,铜的加入可以提高硼在钢中的溶解度,从而可以改善硼钢晶间硼化物的形态,提高钢的力学性能。在高硼铁基合金中,铜不与硼反应,而且不溶于硼化物中,可以充分发挥其增加淬透性的作用。实验结果表明,铜可以有效的增加高硼铁基合金的淬透性,并且可以提高其冲击韧度。

Effect of Copper on Properties of High Boron Iron-Base Alloy

As most of added Mn and Cr used for improving hardenability with B in high boron iron-base alloy(HBIA) form boride which has poor thermal conductivity,the hardenability of the alloy are lowered.The effect of Cu addition on the hardenability is studied in this investigation.Copper,which can increase the hardenability and impact toughness with an appropriate content,has almost the same function as nickel.Copper can also increase the solubility of boron in steel,thus improves the boride morphology at grain boundary and mechanical properties.As copper can not react with boron and dissolve in borides in high boron iron-base alloy,it can play a great role of increasing hardenability.The results indicate that copper can improve hardenability of HBIA effectively and increase the impact toughness as well.