本文選題：38CrMoAl + 45Mn2��； 參考：《南京理工大學(xué)》2015年碩士論文

【摘要】：本文研究了低、中碳合金鋼液相感應(yīng)滲氮、滲碳、氮碳共滲和碳氮共滲技術(shù),液相感應(yīng)滲入技術(shù)是基于感應(yīng)加熱技術(shù)對零件進行化學(xué)熱處理的工藝方法,具有加工時間段短、自動化程度高、節(jié)能高效、環(huán)境污染小等特點,適于處理各種軸類、套管類等各種適于感應(yīng)加熱的零件。分別研究了38CrMoAl液相感應(yīng)滲氮和氮碳共滲工藝,45Mn2碳氮共滲工藝,20CrMnTi液相感應(yīng)滲氮、氮碳共滲和碳氮共滲工藝,滲劑采用甲酰胺溶液；還研究了20CrMnTi液相感應(yīng)滲碳工藝,滲劑采用等溫淬火油。采用金相法、顯微硬度法和XRD分析滲層的顯微組織、硬度和相組成,研究滲層組織與處理時間和處理溫度的關(guān)系,確定最佳工藝參數(shù)。研究結(jié)果表明：38CrMoAl在500℃～650℃進行液相感應(yīng)滲氮和氮碳共滲,550℃～620℃均得到了不同厚度的白亮層組織,滲層硬度較高,在600℃C下處理10min得到了厚度約100μm的共滲層,硬度約800HV0.1。對38CrMoAl滲層進行XRD分析,滲層主要的相有：ζ相(Fe2N)、ε相(Fe2,3N)、γ□相(Fe4N)、α相、Fe3C。對45Mn2試樣在900℃處理5min得到的碳氮共滲層厚度達到330μm,滲層最高硬度達到700HV0.3以上。20CrMnTi在530℃-680℃處理5min均得到了雙白層組織,530℃-590℃處理5min得到的雙白層的硬度較低,約300℃-450HV0.1；6000C-680℃處理5min得到的共滲層硬度較高,最高約550HV0.1以上；對20CrMnTi試樣在700℃-760℃和830℃-880℃進行了液相感應(yīng)碳氮共滲處理,處理5min滲層厚度達到100μm以上,滲層硬度最高為650HV0.3。20CrMnTi經(jīng)液相感應(yīng)滲碳處理后,880℃處理10min的滲碳層厚約150μm,930℃處理10min滲碳層厚約250μm,硬度達到800HV0.3以上,且滲層組織均勻,為針狀馬氏體組織。
[Abstract]:In this paper, the liquid phase induction nitriding, Carburizing, nitrocarburizing and carbonitriding technology of low and medium carbon alloy steels are studied. The liquid phase induction infiltration technology is a chemical heat treatment process for parts based on induction heating technology, which has a short processing time. High degree of automation, energy saving and high efficiency, low environmental pollution, etc., suitable for handling all kinds of shaft, casing and other parts suitable for induction heating. The liquid phase induction nitriding, nitrocarburizing and carbonitriding process of 20CrMnTi were studied respectively, and the liquid phase induction nitriding, nitrocarburizing and carburizing process of 20CrMnTi with formamide solution were studied, and the liquid phase induction carburizing process of 20CrMnTi was also studied. The osmotic agent is isothermal quenching oil. The microstructure, hardness and phase composition of the infiltrating layer were analyzed by metallography, microhardness and XRD. The relationship between the microstructure of the layer and the treatment time and temperature was studied, and the optimum technological parameters were determined. The results showed that different thickness of white bright layer was obtained by liquid phase induction nitriding and nitrocarburizing at 500 鈩，

本文編號：2094467