The invention discloses a carburizing and quenching method and a carburizing and quenching equipment for an internal spline of a half shaft gear, the method comprises that a compensation sleeve is sleeved on the half shaft gear and placed in a quenching furnace with an internal low pressure, then the internal spline is heated to 900 \u2103, propane is introduced at the position of the internal spline, and continues for 240 minutes; then the temperature of the internal spline is reduced to 840 \u2103, and propane is continuously introduced for 45 minutes; the addition is stopped The device comprises a quenching furnace, a hollow placing column is arranged in the quenching furnace, and the bottom of the quenching furnace is connected with an air extraction pipe; the tangent direction of the placing column side is connected with a first branch pipe and a second branch pipe through the air inlet pipe; the high-pressure and high-purity nitrogen is connected for 20 minutes, and the half shaft gear is taken out from the quenching furnace and cooled to room temperature; the device comprises a quenching furnace, wherein the hollow placing column is arranged in the quenching furnace, and the bottom of the quenching furnace is connected with an air extraction pipe; the tangent direction of the placing column side is connected with a The top end is connected with a telescopic cylinder, and the bottom end of the telescopic cylinder is fixed with a resistance type heating coil through a motor. The invention can not only improve the carburizing effect at the position of the internal spline, but also has the advantages of small deformation of the internal spline.
【技术实现步骤摘要】
一种半轴齿轮内花键渗碳淬火方法及渗碳淬火设备
本专利技术涉及一种齿轮内花键渗碳淬火方法及其淬火设备,特别是一种半轴齿轮内花键渗碳淬火方法及其淬火设备。
技术介绍
目前,市场上常见的齿轮淬火,都是将齿轮放入内部高温的淬火炉中,并向淬火炉中通入甲烷、丙烷等气体,使得齿轮表面进行渗碳,接着将渗碳完成的齿轮直接浸入淬火油中进行降温淬火,从而使得齿轮表面具有较好的耐磨性和硬度,而齿轮内部依旧保持有韧性;但对于有内花键的半轴齿轮采用此类装置进行淬火,直接向淬火炉内充入甲烷等气体,气体不易到达内花键位置处,使得内花键位置处的渗碳效果较差;且淬火炉中加热位置处的一端部温度较高,内部温度分布不均匀,使得内花键的整体加热效果不均匀,淬火后内花键会发生较大的变形;同时,半轴齿轮两端部的厚度不均匀,淬火时内花键两端部的变形程度不同,内花键容易发生较大的扭曲。因此,现有的半轴齿轮渗碳淬火方法和设备存在着内花键位置处的渗碳效果较差和内花键变形较大的问题。
技术实现思路
本专利技术的目的在于,提供一种半轴齿轮内花键渗碳淬火方法及渗碳淬 ...
【技术保护点】
1.一种半轴齿轮内花键渗碳淬火方法,其特征在于,包括以下步骤:/na、在半轴齿轮上的半轴部位套接补偿套,得A品;此时,半轴齿轮两端的厚度相同;/nb、将A品竖直放入淬火炉内中空的放置柱顶端,并将淬火炉进行抽气,直至淬火炉内的压强为150~2000pa;/nc、将电阻式加热线圈设置在半轴齿轮中部的内花键位置处,然后对电阻式加热线圈进行通电,将半轴齿轮上的内花键加热至880~950℃;/nd、接着通过中空的放置柱从下往上通入流量为0.08~0.15m
【技术特征摘要】
1.一种半轴齿轮内花键渗碳淬火方法,其特征在于,包括以下步骤:
a、在半轴齿轮上的半轴部位套接补偿套,得A品;此时,半轴齿轮两端的厚度相同;
b、将A品竖直放入淬火炉内中空的放置柱顶端,并将淬火炉进行抽气,直至淬火炉内的压强为150~2000pa;
c、将电阻式加热线圈设置在半轴齿轮中部的内花键位置处,然后对电阻式加热线圈进行通电,将半轴齿轮上的内花键加热至880~950℃;
d、接着通过中空的放置柱从下往上通入流量为0.08~0.15m3/h的丙烷,持续220~280min,得D品;
e、然后将D品中半轴齿轮内花键上的温度降至820~840℃,并持续通入流量为0.08~0.15m3/h的丙烷40~50min,得E品;
f、移走电阻式加热线圈,停止丙烷通入,并通过中空的放置柱从下往上向E品中半轴齿轮内花键位置处通入压强为1~1.5Mpa的氮气,持续15~20min,得F品;
g、从淬火炉内取出F品冷却至室温,接着取下半轴齿轮上的补偿套,得成品。
2.根据权利要求1所述的一种半轴齿轮内花键渗碳淬火方法,其特征在于:所述丙烷沿着放置柱呈螺旋状从下往上输入。
3.根据权利要求1所述的一种半轴齿...
【专利技术属性】
技术研发人员:洪新阳,黄刚敏,周学平,张信伟,郑敏敏,
申请(专利权)人:洪新阳,
类型:发明
国别省市:浙江;33
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