35钢表面增压喷丸纳米化对气体软氮化的影响
Influence of Nano-crystallization by Surface Strengthens Pressure Shot Penning on Gas Soft-nitriding of 35 Steel
陈 磊1, 揭晓华1, 于 能2, 郑向新2
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作者单位：1. 广东工业大学 材料与能源学院, 广东 广州 510006; 2. 广东巨轮模具股份有限公司, 广东 揭阳 515500
中文关键字：增压喷丸； 表面纳米化； 35钢； 气体软氮化
英文关键字：strengthens pressure shot penning; surface nano-crystallization; 35 steel; gas soft-nitriding
中文摘要：通过表面增压喷丸处理，在35钢表面形成了厚40 μm的纳米晶层，对具有纳米晶层的试样进行气体软氮化。采用透射电镜﹑扫描电镜﹑X射线衍射仪等对35钢表面纳米晶组织及其软氮化渗层组织进行了观察与分析，并测试了渗层硬度。结果表明：经过增压喷丸处理的试样，化合物层厚度大约为原始试样的2倍，软氮化时间可由10 h缩短为3 h；渗层硬度也有明显的提高。
英文摘要：The nano-crystalline layer with the thickness 40 μm was formed on the surface of 35 steel by means of surface strengthens pressure shot penning. The samples were then gas soft-nitriding. The microstructure and performance of the soft-nitriding layers surfaces were analysed by TEM, SEM, XRD and microhardness was also tested. The results show that the compound layer of the strengthens pressure shot penning sample is about 2 times thicker than the original sample, the nitriding treatment time reduces to 3 hours from 10 hours. Hardness is also improved.