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A kind of rolling method of 50mn thin-gauge high-carbon cold-rolled steel plate

A cold-rolled steel plate and thin-gauge technology, which is applied in the field of 50Mn high-carbon steel production technology, can solve the problems of low yield strength, reduced fatigue life, and product quality that cannot meet the requirements, and achieve high yield strength, simple composition, and increased The effect of production costs

Active Publication Date: 2022-08-09
RIZHAO BAOHUA NEW MATERIAL CO LTD
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Problems solved by technology

However, the annealing and cold rolling process is a necessary process for the pearlite structure of the hot-rolled high-carbon steel plate to become fine spheroidized cementite. Therefore, although this method has thin gauge and stability, the yield strength is not large because it contains pearlite. , the fatigue life is reduced, and the quality of the final product cannot meet the requirements

Method used

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  • A kind of rolling method of 50mn thin-gauge high-carbon cold-rolled steel plate
  • A kind of rolling method of 50mn thin-gauge high-carbon cold-rolled steel plate

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with specific embodiments. Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.

[0030] The invention is a rolling method suitable for thin gauge 50Mn high carbon cold-rolled steel sheet with thickness ≤2.5mm.

[0031] The production process steps of the invention include: slab heating → rough rolling → finishing rolling → cooling → coil to obtain hot-rolled material → uncoiling → welding → scale breaking → pickling and rinsing → five-stand rolling → coiling → unloading → annealing → Flattening→cutting→cold rolled finished product.

[0032] S1, slab heating

[0033] The composition design of the 50Mn high carbon steel hot-rolled material is: C: 0.5%-0.56%; Si: 0.2%-0.3%; Mn: 0.6%-0.7%, P: ≤ 0.025%; S: ≤ 0.005%; Als: ≤ 0.02%; Cr: ≤ 0.02%; Ni ≤ 0.02%; Cu ≤ 0.0...

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Abstract

The present invention disclosed a method of 50mn thin -specification high -carbon cold rolling steel rolling method. It belongs to the field of cold -rolled steel rolling rolling. The production process steps include: plate blank heating → rough rolling → cooling → volume to get hot rolling materials → open rolls→ Welding → Breaking Scales → Purmaking and Rinse → Five Machine Rolling → Volume → Unloading → Antuction → Flating → Cutting → Cold Rolling Products.Compared with the existing technology, 50MN high -carbon steel can be produced stably on the acid rolling line, avoiding frequent welding seams, and the quality of the 50MN cold -rolled plates is guaranteed to meet the user's use requirements.

Description

technical field [0001] The invention relates to a production process of 50Mn high-carbon steel, in particular to a rolling method of a thin-gauge 50Mn high-carbon cold-rolled steel plate with a thickness of less than or equal to 2.5 mm. Background technique [0002] 50Mn high carbon steel is a high carbon steel product with a wide range of uses. It is usually an intermediate product of the so-called hot rolled steel plate made from a slab through a continuous hot rolling process. Cold rolled steel sheets are produced by cold rolling. The cold-rolled steel sheet is then repeatedly subjected to the annealing process and the cold-rolling process in sequence to obtain a cold-rolled steel sheet with a desired thickness. [0003] With the advancement of hot rolling production line technology, it has become feasible to produce hot rolled steel sheets with a thickness of less than 2.5mm. Due to the high content of C, Si and Mn in 50Mn high carbon steel and high strength, through c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/02C22C38/02C22C38/04C22C38/06C22C38/42C21D1/26C21D6/00C21D8/02C21D9/00C21D9/50
CPCB21C37/02C22C38/02C22C38/04C22C38/002C22C38/06C22C38/42C21D1/26C21D6/004C21D6/005C21D6/008C21D8/0221C21D9/0081C21D9/50C21D2211/005C21D2211/009Y02P70/10
Inventor 王野郭久明齐林雷李远旭郑茂刚包红军
Owner RIZHAO BAOHUA NEW MATERIAL CO LTD
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