Measuring method of carbon content inside mesh belt heat treatment furnace
A heat treatment furnace and measurement method technology, applied in heat treatment equipment, heat treatment process control, color/spectral characteristic measurement, etc., can solve the problems of carbon content error and difficulty in determining the carbon content inside the furnace, and achieve accurate detection, convenient operation, Solve the effect of increasing and decarbonizing
Inactive Publication Date: 2015-08-26
浙江迪特高强度螺栓有限公司
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Problems solved by technology
At present, mesh-belt heat treatment furnaces generally use oxygen probes to monitor the carbon content inside the furnace. There is often an error with the carbon content displayed by the actual oxygen probe, and it is difficult for technicians to determine the actual carbon content inside the furnace
Method used
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[0021] see figure 1 , figure 2 and image 3 , a method for measuring carbon content in a mesh belt heat treatment furnace disclosed by the invention, comprising the following steps:
[0022] (1) Prepare three 08F steel plates 1 and a spectrum analyzer;
[0023] (2) Place three 08F steel plates 1 on the left, middle and right positions of the mesh belt furnace 2 respectively, and arrange the three 08F steel plates in a straight line;
[0024] (3) Then three pieces of 08F steel plates 1 are put into the mesh belt furnace 2 together with the product to carry out quenching and tempering heat treatment;
[0025] (4) Remove the oil film on the surface of the heat-treated 08F steel plate 1 with alcohol, and remove the surface oxide layer with fine sandpaper; preferably, 04 fine sandpaper is used for the fine sandpaper in this embodiment.
[0026] (5) Put the 08F steel plate 1 on the spectrometer that has completed the global standardized calibration to detect the carbon content;...
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The invention discloses a measuring method of a carbon content inside a mesh belt heat treatment furnace. The measuring method comprises the following steps: three 08F steel plates and a spectrum analyzer are prepared; the three 08F steel plates are placed in left, middle and right positions of a mesh belt furnace respectively; then the three 08F steel plates are put in the mesh belt furnace along with a product, quenched-tempered heat treatment is carried out; oil films on the surface layer of the 08F steel plates after heat treatment are removed through alcohol and surface oxide layers of the 08F steel plates are removed through fine sand paper; the 08F steel plates are placed on the spectrum analyzer and subjected to carbon content detection; during detection, each 08F steel plate adopts diagonals, carbon content detection of three points are carried out, the average value of the detected carbon contents of the three points is the carbon content of each 08F steel plate; the detected average carbon contents of the three 08F steel plates are actual carbon contents of the left, middle and right positions inside the mesh belt furnace, the total carbon content inside the mesh belt furnace is one third of the sum of the average carbon contents of the three 08F steel plates. The operation is simple and the carbon content detection is precise.
Description
technical field [0001] The invention relates to the technical field of methods for measuring carbon content, in particular to a method for measuring carbon content in a mesh belt heat treatment furnace. Background technique [0002] There are four performance grades for high-strength bolts, namely grades 8.8, 9.8, 10.9 and 12.9. Bolts of these grades are generally produced with medium-carbon alloy structural steel (carbon content ≥ 0.30%) and must be heat-treated to improve the strength of the bolts. Comprehensive mechanical properties. Due to the large production volume of fasteners, low price, relatively small and precise threaded parts, and the high degree of automation of mesh belt heat treatment furnaces, most companies will choose mesh belt heat treatment furnaces. [0003] The key indicator of high-strength bolt performance is that the bolt thread does not allow decarburization and carburization. The thread decarburization or carburization of bolts is mainly related...
Claims
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Login to View More IPC IPC(8): G01N21/25C21D11/00
Inventor 苏友份吴承涛滕宝贵周世团李培银
Owner 浙江迪特高强度螺栓有限公司