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钢铁零件经渗铬、渗硼处理后,表面均能获得高硬度(HV 1400～2000),具有良好的耐磨、耐腐蚀、抗高温氧化和抗疲劳性能,但是,渗铬层深度较浅;渗硼层脆性较大,并且在高于850℃时抗氧化性能差。因此,近十多年来为了改善零件表面的综合使用性能,国外出现铬硼、铬钛二元共渗新工艺,据资料介绍,铬硼共渗层深度比渗铬层深,具有良好的抗蚀性和较低的脆性;铬钛共渗层具有高硬度(HV>2200)及良好的耐蚀性。所以引起国内外热处理工作者的重视。下面把我们最近的试验结果介绍如下。
The steel parts can get high hardness (HV 1400-2000) after being infiltrated by chromizing and boronizing, and have good abrasion resistance, corrosion resistance, high temperature oxidation resistance and fatigue resistance, but the depth of chromizing layer is shallower; Boronizing layer brittle more, and more than 850 ℃ poor oxidation resistance. Therefore, over the past decade in order to improve the overall performance of the surface of parts, chrome boron boron, chromium titanium dual infiltration new technology, according to the information, chromium boron boron penetration depth deeper than the chromizing layer, with good resistance Corrosion and low brittleness; Cr-Ti common layer with high hardness (HV> 2200) and good corrosion resistance. Therefore, the attention of heat treatment workers at home and abroad. Here’s our recent test results below.