摘要
本文介绍了 BD2F 钢采用甲醇添加三乙醇胺为共渗剂,于780～820C 进行亚温气体碳氮共渗和淬火,获得0.5毫米渗层深度,HRA82致密的碳氮马体层。该工艺特点,是基体只发生部分相变,因而变形极小。本文从测定不同工艺的碳氮浓度分布、组织结构、显微硬度分布、机械性能和变形试验情况与液体氰化相比较。试验结果表明、该工艺完全能够取代液体氰化,消除公害,适合处理轻纺工业上薄小形状复杂零件,经济效果显著。
This paper discusses the process intercritical gas carbonitriding-hardening of BD2F steel at 780～820℃ with a mixture of methanol and triethanolamine. The paper contents of carbon and nitriogen,thickness(0.5mm),hardness (HRA82).is fine martensite layer of carbon and nitrogen of the case have been obtained by the process.The character of the process is that distortio of parts treated is extremely little because of only partially tarnsforming on matrix.This process has been compared with liquid cyaniding in followinf areas such as the distribution of carbon and nitrogen concentration,microstrg- uctures,microhardness distribution,mechanical behaviour,and distortion of the case.It has been shown that the new process can replace liquid cyaniding process completely and be applied to the parts with thinner thickness and co- mplicated shaps in the light and textile industry,with advantage of elimina- tingsocial effect of pollution and considerable economic benefit.
关键词
甲醇
三乙醇胺
亚温气体碳氮共渗
液体氰化
机械性能
Methanol
triethanolamine
intercritical gas carbonitriding
liquid cyaniding
mechanical behaviour
