Method for detecting large-sized inclusions in high carbon steel

A detection method, high-carbon steel technology, applied in scanning probe technology, instruments, etc., can solve the problem of low detection probability of large-size inclusions, inability to accurately find large-size inclusions, and inability to use inspection to find large-size inclusions, etc. problems, to shorten the time to find inclusions and avoid missed detection
CN108802432AInactive Publication Date: 2018-11-13XINGTAI IRON & STEEL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XINGTAI IRON & STEEL
Publication Date
2018-11-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for detecting large-sized inclusions in high carbon steel. The method comprises the following steps: (1) taking a sample of the high carbon steel product within 3 daysafter production, and then breaking the sample; (2) observing the fracture of the sample to determine the positions of white points on the fracture; and (3) detecting and analyzing the size and composition of inclusions at the white point positions. The method can quickly locate the positions of large-sized inclusions by breaking, facilitates the detection and analysis of the inclusions, determines the size and quantity of inclusions at the maximum level of the sample, determines the inclusion control level of steel products, and guides the improvement of the steelmaking process. The method greatly shortens the time for searching for the inclusions in a detection process, and avoids the condition of frequently missed detection in a conventional detection method.
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Description

technical field

[0001] The invention belongs to the field of iron and steel material detection, in particular to a method for detecting large-size inclusions in high-carbon steel. Background technique

[0002] There are many detection methods for non-metallic inclusions in steel. Traditionally, metallographic methods are commonly used to conduct inductive calculations for the level, size and pass of inspection inclusions. Metallography can only detect a certain plane inside the steel, but cannot detect inclusions in a certain volume, and there are few inclusions detected, and large-size inclusions are rarely or even impossible to detect. The large-sample electrolysis method developed in recent years can test all inclusions in a certain volume, but it takes a very long time to test a larger volume. At present, the electrolysis method can only test inclusions within a volume of a few cubic millimeters, and the test volume is small. At the same time, the electrolysis process t...

Claims

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