一种时效硬化钢的深层离子渗氮.pdf

第39卷第7期
属熟餍
Vo. 39 No
2014年7月
HEAT TREATMENT OF METAI
July 2014
一种时效硬化钢的深层离子渗氮
杜树芳
(长春金马热处理公司,吉林长春130012)
摘要:对20CrN3Mn2AI时效硬化钢进行不同温度和不同时间的离子渗氮处理,优选出最佳渗氮工艺为(520~540)℃×50h氨气
变温深层离子渗氮处埋,表层硬度高,化合物层薄,硬度梯度好,表面下0.1mm处硬度大于900IV,0.4mm处硬度大于600IⅣV,渗
氮层深大于0.7mm,基体便度为400-450HV,可用于制造大型重载高速精密齿轮,部分替代渗碳钢,省去渗碳和油淬工序,简化工
艺,減少变形。
关键词:深层离子渗氮:时效硬化;渗氮齿轮钢
中图分类号:TG156.82文献标志码:A文章编号:0254-6051(2014)07-0085-04
Deep layer plasma nitriding of an age hardened steel
Du Shufang
(Changchun Jinma Heat Treatment Co., Itd., Changchun Jilin 130012, China)
Abstract The plasma nitriding with iferent em ure and time or the age hardened steel of 20r i3 Mn Al was carried out to choose the
optimum nitriding technology of the deep layer plasma nitriding in ammonia and alteration temperalures on 520 540 50 h, which results
in high surface hardness, thin compound layer and gentle hardiness gradient. The hardness is higher than 900 ITV at 0. 1 mm below the
surface, and more than 600 HV at 0.4 mm below the surface, nitriding depth is deeper than 0. 7 mm and the substrate hardness is in th
range of 400-450 IV. T can be used to manufacture the gears of the large - scale, heavy load, high speed and precision, to replace partially
the carburizing steel, therefore can leave out the carburizing and oil quenching process, simplify the technology and reduce the deformation
Key words: deep layer plasma nitriding; age hardening; nitrided gear steel
渗氮技术可以在工件微变形条件下,实现显著提
为了适应渗氮技术在重载条件下的应用,世界各
高工件耐蘑性,疲芳强度和耐蚀性,但是相对渗碳技术国从渗氮工艺和渗氮钢两方面进行了大量研究和生产
而言,渗氮层薄,基体硬度低,俗称“貨壳”现象,严重实践。德国在20世纪80年代领先研究了深层渗氮工
限制了渗氮技术的应用范間。
艺,提出了渗氮表面硬度850~900HV,渗层厚度
1mm,基体硬度330HV,所处理的渗氮齿轮优于渗碳
收稿日期:2014-04-24
淬火齿轮。 M Week等进行了离子渗氮提高齿轮性
作者简介:杜树芳(1938一),男,高数工程师,长期从事离子热处理与真
空热处理基础研究及技术开发工作,联系电话:13304318889, s -ail:
能的研究,提出渗氮齿轮表面具有高的硬度,深层
23829022289q9.com
渗氮和较高心部硬度(33~36HRC),可获得很高的接
doi:10.13251/j.issn.02546051.2014.07.020
触疲劳强度和弯山疲劳强度,大大提高齿轮承载能力,
现象,粗糙度值变化不大。
3)当喷射时间为4min时,轴承套圈表面的粗糙L5」郭培,方慧,余録池?液体喷射抛光技术研究J」激光尔志,
2008,29(1):2527
度值为0.465m,满足技术要求,为提高生产效率并
[6]方慧,郭培基,余景池.液体喷射抛光材料去除机理的研究
综合考虑其他因素,强化研磨加工时间应以控制在
冂].光学技术,2(04,30(2):248-250
4min左右为佳。
7I Fu P, Zhan K, Jiang C. Micro-structure and surface layer properties of
18CRNIM07-6 steel afler multistep shol peening J Malerials
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