Morphology Study on Inclusion Modifications Using Mg-Ca Treatment in Resulfurized Special Steel
Morphology Study on Inclusion Modifications Using Mg-Ca Treatment in Resulfurized Special Steel
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加硫特钢镁钙处理夹杂物变质的形貌研究
DOI：
10.3390/ma12020197
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发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
Fu Jianxun
中科院分区：
文献类型：
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作者：
Shen Ping;Fu Jianxun
在渗碳特殊钢中，变质的主要夹杂物是MnS和Al2O3。疲劳寿命和可加工性。重要的是，这两个夹杂物应该得到很好的控制。提高钢材质量和使用性能。在本研究中，采用Mg-Ca处理。对渗碳钢中的MnS和Al2O3夹杂物进行改性，以减少对渗碳钢的有害影响。疲劳寿命和可加工性。在实验室研究中，将Ni-Mg合金添加到16MnCrS5和。49 mnvs3钢。Al2O3和CaO-Al2O3均逐渐被改性为MgO·Al2O3和MgO。被MnS所包围，即具有氧化物核心和硫化物外层的复杂包裹体。成立。随着Mg含量的增加，复合包裹体的含量也随之增加。在热锻中。未Mg处理的夹杂物呈长条形，Mg处理的夹杂物呈长条形。在这种情况下，处理后的变形较小，具有低纵横比的球形形貌。夹杂物对钢的力学性能影响较小。Mg-Ca处理也适用于。炼钢厂生产含硫特种钢。扫描电子显微镜-能量。色散光谱仪和统计结果与实验室研究结果吻合较好。
In resulfurized special steel, MnS and Al2O3 are two main inclusions that deteriorate.fatigue life and machinability. It is important that these two inclusions should be well controlled to.increase steel quality and usage performance. In the present study, a Mg–Ca treatment was employed.to modify the MnS and Al2O3 inclusions in resulfurized steels to reduce detrimental effects on.fatigue life and machinability. In the laboratory study, Ni–Mg alloy was added to 16MnCrS5 and.49MnVS3 steels. Both Al2O3 and CaO–Al2O3 were gradually modified to MgO·Al2O3 and MgO,.being surrounded by MnS, that is, a complex inclusion with an oxide core and sulfide outer layer.was formed. The amount of the complex inclusion increased with Mg content. In the hot forging.experiment, non-Mg treated inclusions were in the morphology of long strip, while those with Mg.treatment were seen to be less deformed with spherical morphology of low aspect ratio in which case.inclusions had less effect on steel mechanical properties. The Mg–Ca treatment was also applied to.the manufacture of resulfurized special steel in steel plants. The scanning electron microscope–energy.dispersive spectrometer and statistical results agreed well with those in the laboratory studies.