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众所周知,钢零件表面多种元素共渗是一种能取得良好使用性能的、有效的化学热处理方法。在熔融玻璃盐浴炉中进行渗硼的化学热处理,可以在较低温度下完成处理,减少对金属坩埚的腐蚀;既能增加渗硼层的显微硬度,又不使渗硼层脆化。本文探讨了在熔融玻璃盐浴中,二氧化硅浓度大小对渗硼层内部组织及渗硼层变化的影响。一、使用的材料试验中使用的二氧化硅矿砂是“米奥勒坎尼”(Miorcani)地区采砂场提供的。该矿砂含硅量丰富,粒度细微,有利于提高混合配料熔化速度。在二氧化硅浓度对渗硼层影响的研究试验中,采用了10×10×7mm的OLC15碳钢的试样,这种材料的化学成分见表1。
As we all know, a variety of elements on the surface of steel parts infiltration is to achieve good performance, effective chemical heat treatment. In the molten glass salt bath furnace boronizing chemical heat treatment, can be completed at lower temperatures to reduce the corrosion of the metal crucible; both to increase the hardness of the boronizing layer without embrittlement boride layer. In this paper, the influence of the concentration of silica on the internal structure and the boronizing layer in the molten glass salt bath was discussed. MATERIALS USED Silica ores used in the tests were provided at the mining grounds in the Miorcani region. The ore is rich in silicon content, fine grain size, is conducive to increasing the melting speed of mixed ingredients. In the study of the effect of silica concentration on the boronizing layer, a test piece of 10 × 10 × 7 mm OLC15 carbon steel was used. The chemical composition of this material is shown in Table 1.