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Method for observing transformation surface relief of eutectoid steel pearlite by confocal laser microscope

A technology of laser microscope and surface embossment, which is applied in the direction of material analysis, material analysis, and measuring devices through optical means, which can solve the problems of changing surface embossment and other problems, and achieve the effect of simple operation

Active Publication Date: 2011-03-30
SHOUGANG CORPORATION
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Problems solved by technology

[0004] The object of the present invention is to provide a method for confocal laser microscopy to observe the embossment of the pearlite transition surface of eutectoid steel, which solves the problem of confocal laser microscope observation of the embossment of the pearlite transition surface, simplifies the detection method,

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  • Method for observing transformation surface relief of eutectoid steel pearlite by confocal laser microscope
  • Method for observing transformation surface relief of eutectoid steel pearlite by confocal laser microscope
  • Method for observing transformation surface relief of eutectoid steel pearlite by confocal laser microscope

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Embodiment

[0015] A method for confocal laser microscope observation of eutectoid steel pearlite transition surface embossment, specific steps:

[0016] The first step is to put the polished sample into the confocal laser microscope heating crucible, and after vacuuming, pass it into the argon protective atmosphere;

[0017] The second step is to heat to the austenitizing temperature of 900°C and hold for 180 seconds;

[0018] The third step is to cool to 680°C at a cooling rate of 3°C / s.

[0019] The results of observing the surface embossment of eutectoid steel pearlite transformation are shown in Figure 1 ~ Figure 3 .

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Abstract

A method for observing transformation surface relief of eutectoid steel pearlite by a confocal laser microscope belongs to the field of metallographical detection of material, and is characterized in that a sample is put in a heating crucible of a confocal laser microscope after polishing in the first step, and argon is used for protecting atmosphere after creation of vacuum; heating is carried out till the austenitizing temperature of 850 to 900 DEG C and heat preservation lasts 150 to 180 seconds in the second step; cooling is carried out till the temperature of 600 to 710 DEG C with the cooling speed of 3 to 7 DEG C per second. The invention solves the problem that the transformation surface relief of eutectoid steel pearlite is difficult to be observed by the confocal laser microscope, thereby obtaining the method for observing transformation surface relief of eutectoid steel pearlite by the confocal laser microscope.

Description

technical field [0001] The invention belongs to the technical field of metallographic detection of materials, and in particular provides a method for observing the surface relief of eutectoid steel pearlite transformation with a confocal laser microscope, which is used for analyzing the surface relief of pearlite transformation in the austenite cooling process This phenomenon provides a more direct and convenient method for studying the phase transition characteristics and process of pearlite. Background technique [0002] Surface relief has always been one of the main features of shear phase transformation. Later, it was found that bainite phase transformation also has surface relief effect, and pointed out that the diffusion-type step mechanism can also produce surface relief. It is believed that the difference between relief and phase interface is essentially It is related to the coherent property. As the phase transition temperature increases, the surface relief will dis...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/84C21D6/00
Inventor 王猛王全礼陈明跃王立峰温娟王丽萍崔京玉陈兆阳
Owner SHOUGANG CORPORATION
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