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首页> 外文期刊>Surface & Coatings Technology >Enhanced boronizing kinetics and high temperature wear resistance of H13 steel with boriding treatment assisted by air blast shot peening
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Enhanced boronizing kinetics and high temperature wear resistance of H13 steel with boriding treatment assisted by air blast shot peening

机译：喷砂喷丸处理后的渗硼处理增强了H13钢的渗硼动力学和高温耐磨性

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摘要

A nanostructured surface layer was fabricated on H13 steel by means of air blast shot peening (ABSP). A much thicker borided layer on the ABSP sample can be synthesized by a duplex boronizing treatment (DBT) at 600 degrees C for 2 h, which is followed by at a higher temperature for a certain time. The borided layer was composed with monophase of Fe2B and the growth of it exhibited a (002) preferred orientation. Moreover, the activation energy of boron diffusion for the ABSP sample is 227.4 kJ/mol, which is lower than 260.4 kJ/mol for the coarse grained counterpart. The results indicate that the boronizing kinetics can be effectively enhanced in the ABSP sample with DBT. The high temperature wear resistance of H13 steel with DBT can be improved significantly. Furthermore, the H13 steel with DBT assisted by ABSP possesses more superior wear resistance property at elevated temperatures than that of coarse-grained sample with DBT, which can be attributed to the fact that the thickness and microhardness of the borided layer can be increased with the help of ABSP. Meanwhile, the fatigue crack initiation and propagation in borided layer during the wear test can be impeded by the compressive residual stress and the refined grains in the borides of ABSP sample with DBT. (C) 2016 Elsevier B.V. All rights reserved.
机译：通过喷丸喷丸（ABSP）在H13钢上制备了纳米结构表面层。 ABSP样品上厚得多的硼化层可以通过在600摄氏度下进行2小时的双重硼化处理（DBT）进行合成，然后在更高的温度下持续一定的时间。硼化层由Fe2B单相组成，其生长表现出（002）择优取向。此外，ABSP样品中硼扩散的活化能为227.4 kJ / mol，低于粗粒对应物的260.4 kJ / mol。结果表明，使用DBT可以有效地增强ABSP样品中的渗硼动力学。带DBT的H13钢的高温耐磨性可以大大提高。此外，ABSP辅助的DBT的H13钢在高温下比DBT的粗晶粒样品具有更优越的耐磨性，这可以归因于随着时间的推移，硼化层的厚度和显微硬度可以增加。 ABSP的帮助。同时，采用DBT的ABSP试样的硼化物中的压缩残余应力和细化晶粒会阻碍磨损试验过程中疲劳裂纹在硼化层中的萌生和扩展。 （C）2016 Elsevier B.V.保留所有权利。

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