硼对Fe-Cr-C耐磨堆焊合金组织的影响

在Fe-Cr-C耐磨堆焊合金中，加入硼元素可以有效地提高堆焊层的硬度。本工作以高碳、高铬耐磨堆焊合金为基础，在五组不同的堆焊焊条药皮中加入不同含量的硼元素，研究了硼对Fe-Cr-C耐磨堆焊合金硬度、组织的影响。实验结果表明，在Fe-Cr-C系耐磨堆焊合金中加入硼，当在0.1%～0.9%时，堆焊层表面宏观硬度随着硼含量的增加而近似的呈线性增加。当硼含量大于1%时，继续加入硼，对宏观硬度的增加影响较小。当含硼量在0.1%～0.9%范围内，硼能显著提高Fe-Cr-C耐磨合金组织中的硬质相密度。硼对硬质相密度影响的敏感成分范围是0.1%～0.9%，当硼含量大于1%时，继续增加硼含量，硬质相含量没有明显增加。在所研究的含硼量范围内，硼对基体组织的硬度影响较小。

The Effect of Boron on the Microstructures of Fe-Cr-C Hardfacing Alloy

Boron can improve the hardness in Fe Cr C hardfacing overlay alloy efficiently In this paper, based on the Fe Cr C hardfacing overlay alloy, different amounts of boron contents were selected to study the effects of boron on the hardness and microstructures of the alloy The arc hardfacing electrodes were prepared in five groups, which content different amounts of boron The experiment results show that the hardness of Fe Cr C hardfacing alloy increases approximately lineally with the addition of boron as the boron contents are from 0 1% to 0 9% There is a little influence of boron on the hardness when the boron contents are more than 1% The density of hardened phase is also increasing with the boron contents from 0 1% to 0 9% When the boron contents are more than 1%, the density of hardened phase is not effectively affected by boron contents There is no obvious influence of boron on the hardness of overlay metal