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用一种新型的等离子体浸没式离子注入技术(PⅢ),在Cr12MoV钢基体上制备了TiN膜,经XPS分析发现,膜中的组织为TiN、TiO2和Ti2O3。对有与无TiN膜的Cr12MoV钢试样进行对比,测定了维氏硬度,耐磨性以及磨痕。结果表明:TiN膜具有高的硬度和优良的抗摩擦性能。 相似文献
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本文对Cr12MoV模具钢TiN涂层的力学性能进行了研究。用XRD等仪器测定了TiN涂层的组织结构和显微硬度、耐磨附着力等性能。 相似文献
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通过测定不同热处理条件下Cr12MoV钢的硬度值和残余奥氏体量,并通过金相和透射电镜观察发现.钢中的列余奥氏体和下贝氏体组织对冷作模具钢的耐磨性能有不利的影响.采用冷处理工艺可以抑制下贝氏体转变.显著提高Cr12MoV钢的硬度和耐磨性能. 相似文献
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夏期成 《机械工人(热加工)》1992,(6):40-42
Cr12MoV钢广泛用于制造高性能的冷作模具,要求淬火至高硬度(HRC>60)的常规工艺规定的淬火温度是1020~1040℃。为了充分发挥Cr12MoV钢的性能潜力和工艺的适用性,我们试验了Cr12MoV钢的低温淬火,该工艺能在获得高的淬火硬度的基础上提高钢的强度和韧性,改善某些工模具的使用寿命,同时有利于减小淬火变形和扩大淬火加热工艺的适用性, 相似文献
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采用磁控溅射技术在淬火态Cr12MoV表面制备SiC/TiN、SiC/TiB2-TiN薄膜(SiC为中间层),研究TiN、TiB2-TiN薄膜的组织结构和摩擦磨损性能。结果表明,SiC薄膜与基材和TiN、TiB2-TiN薄膜间都具有明显的且呈梯度的元素扩散,界面结合良好。在水润滑条件下与钢球对摩时(载荷0.5 N,时间0.5 h),TiN薄膜、TiB2-TiN薄膜具有良好摩擦磨损性能,其平均摩擦因数分别为0.33、0.31,低于淬火态Cr12MoV的0.45,磨损速率分别为2.0×10-8和1.5×10-8mm3/(N.m),低于淬火态Cr12MoV的8.66×10-7mm3/(N.m),其中在水润滑条件下TiB2-TiN薄膜比TiN薄膜具有更好的摩擦磨损性能。 相似文献
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阐述了Cr12MoV钢在制造模具过程中热处理的重要性,通过对Cr12MoV钢的锻造、锻造后的热处理及热处理前的预处理、最终热处理等方面介绍了Cr12MoV钢在制造模具时在热处理方面应注意的问题和经验,以保证Cr12MoV钢制造的模具,特别是容易变形、要求精度较高的模具热处理后能够满足模具图纸及技术需求。 相似文献
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TiN、CrN的环境摩擦磨损对比研究 总被引:1,自引:0,他引:1
采用直流叠加脉冲偏压电弧离子镀技术在45钢表面沉积了TiN、CrN薄膜。用显微硬度计测试了薄膜的硬度,用划痕仪测量了薄膜的膜基结合力,用球-盘式摩擦磨损试验机评价了不同介质条件下(干摩擦、水润滑、油润滑)TiN、CrN薄膜的摩擦学特性,用表面轮廓仪测试了薄膜磨痕处的磨损轮廓,用扫描电镜(SEM)观察了薄膜磨痕形貌。结果表明,相对于干摩擦条件下,在水润滑和油润滑条件下TiN和CrN薄膜的摩擦因数和磨痕深度都有所降低。在相同的介质条件下,CrN薄膜的摩擦因数和磨痕深度始终小于TiN薄膜。 相似文献
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Long Lu Feng Xu Tao Jiang Qi Zhang Sungki Lyu 《International Journal of Precision Engineering and Manufacturing》2010,11(1):107-111
C-N films were deposited on the 20CrMo alloy steel substrate by the Plasma Source Ion Implantation (PSII) method and TiN films
were coated on the same material by the Physical Vapor Deposition (PVD) method. It was found that friction coefficient of
C-N coating were relatively lower than TiN coating. And with the load increased, the friction coefficients of C-N coating
and TiN coating were both decreased. Then the author puts forward the test rig, working under the conditions of 1,800 rpm,
20 N·m for 100 h. The observations by microscope showed the wear reduced. The antiwearing performance enhanced prominently.
But the TiN coated gear had a more serious friction phenomenon than C-N coated gear. This is caused by that coating of TiN,
which was made at a high temperature about 500°C. The high temperature led to the substrate intenerated and the surface hardness
had decreased from 850 HV to 630 HV. PSII method eliminates the tempering problem of the coating of C-N films, which had better
wear resistance than TiN films. The friction and wear resistance of gears which coated by C-N films ameliorated significantly. 相似文献
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Zhuang Da-Ming Liu Jia-Jun Zhu Bao-Liang Li Wen-Zhi Zhang Xu-Shou Yang Sheng-Rong 《Tribology International》1996,29(6):507-513
The tribological properties of Si3N4 and TiN thin films produced by ion beam enhanced deposition (IBED) were compared on a SRV friction and wear testing machine. The friction coefficient of all thin films shows a descending tendency with increase in load, and is lower than that of 52100 steel. All the IBED films show a much better wear resistance than 52100 steel, especially in the higher load and frequency ranges; it can reach six times that of the latter. In order to understand the reasons for their excellent properties, the microstructure, microhardness and bonding strength with the substrate were analysed by SEM, X-ray diffraction, Knoop hardness and scratching test methods separately. The results show that the TiN(1) film exhibits the best tribological properties, which are closely related with its greater hardness and bonding strength. 相似文献
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Tribological properties of plasma nitrided stainless steel against SAE52100 steel under ionic liquid lubrication condition 总被引:8,自引:0,他引:8
Yanqiu Xia Shijie Wang Feng Zhou Haizhong Wang Yimin Lin Tao Xu 《Tribology International》2006,39(7):635-640
1Cr18Ni9Ti stainless steel was modified by plasma nitriding. The phase composition of the plasma nitrided layer was examined by means of X-ray diffraction. The friction and wear properties of the modified and unmodified 1Cr18Ni9Ti stainless steel specimens sliding against SAE52100 steel under the lubrication of ionic liquid of 1-ethyl-3-hexylimidazolium hexafluorophosphate (L-P308) and poly α-olefin (PAO) were investigated on an Optimol SRV oscillating friction and wear tester, with the interactions among the modified surface layer and the ionic liquids and PAO to be focused on. The morphologies of the worn surfaces were observed using a scanning electron microscope. The chemical states of several typical elements on the worn surfaces of the modified steel surfaces were examined by means of X-ray photoelectron spectroscopy. Results showed that the modified sample had better anti-wear abilities than the unmodified one, but the modified sample had a slightly higher friction coefficient than the untreated one. This was partly attributed to the change in the hardness and phase composition of the stainless steel surfaces after plasma nitriding and tribochemical reactions between the steel and the lubricant. The resultant surface protective films composed of various tribochemical products together with the adsorbed boundary lubricating film contributed to reduce the friction and wear. 相似文献