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Automatic sample outlet mechanism for gas nitriding stove

A technology of gas infiltration and nitrogen furnace, applied in furnaces, muffle furnaces, cooking furnaces, etc., can solve the problems of quality accidents of the whole furnace workpiece, pungent ammonia smell, furnace gas overflow, etc.

Inactive Publication Date: 2012-07-04
天津市天瑞硬化工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process will cause the overflow of furnace gas, and the operator has to endure the pungent ammonia smell
[0005] Although gas nitriding has realized the automation of process control at present, because gas nitriding is still a multi-factor system, once a mistake will cause a quality accident of the entire furnace workpiece

Method used

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  • Automatic sample outlet mechanism for gas nitriding stove
  • Automatic sample outlet mechanism for gas nitriding stove
  • Automatic sample outlet mechanism for gas nitriding stove

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Embodiment Construction

[0017] The implementation of the three components of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] attached figure 1 It is a schematic diagram of the appearance of the metallographic sample used in the present invention, and its specific size is not strictly regulated, and generally the ratio of the radial dimension to the axial dimension is about 1:3.

[0019] After determining the shape and size of the metallographic sample, the fixed plate and sampling plate can be processed. The structure diagram of the fixed plate and the sampling plate is attached. figure 2 , attached image 3 As shown, the size of the holes on the plate is the same, and the hole diameter should be 1mm larger than the radial dimension of the metallographic sample. The number of holes on the fixed plate is an integer and evenly distributed. The centerlines of the holes should be on a circle of the same size.

[0020] This is followed by...

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Abstract

The invention relates to an automatic sample outlet mechanism for muffle tank-free gas nitriding stove and a cover gas nitriding stove. The mechanism comprises main parts such as a sampling disk, a sampling tube and the like. When the nitriding stove is in a positive pressure (less than or equal to 0.3MPa) or negative pressure state, the mechanism can be used for extracting metallographic specimens preloaded in the stove without disturbing atmosphere of the stove, and the number of the metallographic specimens preloaded in the stove can be determined as required. The mechanism provides convenience for timely mastering the actual effect of a gas nitriding process.

Description

technical field [0001] The invention relates to an automatic sampling mechanism for a gas nitriding furnace without a muffle tank and a bell-type gas nitriding furnace, which belongs to the field of heat treatment equipment. Background technique [0002] Gas nitriding is a widely used low-temperature chemical heat treatment process. An important feature of this process is the irreparability of the defects of the infiltrated layer. Metallographic analysis after the process found that there are reticular, vein-like structures or surface layers in the infiltrated layer. The brittleness is unqualified, and even repeated nitriding cannot eliminate the above defects. [0003] In order to ensure the quality of nitriding parts, one method is to establish a gas nitriding database and induce a mathematical model, so as to realize the defect-free nitriding process through the numerical management of process parameters. Another method is to directly extract the samples preloaded in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/24F27D3/00F27B5/13
Inventor 张元增
Owner 天津市天瑞硬化工程有限公司