Quality evaluation method for preventing hot-rolled plain carbon steel from cracking during 90-degree bending

Abstract

The invention discloses quality monitoring and provides a quality evaluation method for preventing hot-rolled plain carbon steel from cracking during 90-degree bending, which comprises the following steps: step S100: manufacturing a transverse blank; step S200: manufacturing a standard sample of a mechanical property; step S300: testing the mechanical property; step S400: performing chemical component detection and metallographic detection on a finished product; step S500: analyzing an unqualified reason of a quality product; and step S600: performing targeted improvement according to the unqualified reason in combination with a production process. The quality evaluation method of the invention has the beneficial effects that: it is ensured that a delivery product is not cracked when beingbent on the position of a user, quality objections are avoided, good reputation is gained from the user, and a large market share is obtained; the quality of iron and steel production enterprises ispromoted to be comprehensively improved, the reason and the working procedure causing the unqualified quality are determined through metallographic microscopic analysis, the improvement can be purposefully realized, and the quality is promoted comprehensively.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a quality evaluation method for preventing 90-degree bending cracking of hot-rolled common carbon steel. Background technique [0002] Hot-rolled plain carbon steel Q235B steel strip is a conventional product of iron and steel companies, mainly used in the production of spare parts such as mechanical structural parts, square pipes, round pipes, stamping parts, etc. However, in the production process of the user to make mechanical structural parts, square pipes, etc., there are obvious cracks at the bending angle when the user bends to a 90° angle. This situation not only affects the user's continuous production, but also affects the output. , It also affects the quality and delivery date of its products, and directly affects the normal settlement between the supply and demand sides; sometimes, the upstream traders will cut the steel strips according to certain spec...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a quality evaluation method for preventing hot-rolled ordinary carbon steel from cracking at 90-degree bending, aiming to solve the problem of cracking of hot-rolled ordinary carbon steel strips in iron and steel companies when they are used for bending, and to prevent steel strips with a risk of cracking from leaving the factory , promote the improvement of product quality, reduce waste in the production process, and better provide high-quality products for downstream customers

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