Bloom continuous casting production method of high-strength steel for multiple unit brake disc

A production method and bloom technology, applied in the field of metallurgy, can solve problems such as large amount of alloy and affecting product performance

Active Publication Date: 2021-12-24
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of alloy, it is easy to produce slab surface cracks and slab defects such as low-power center segregation, center porosity and center shrinkage cavity when continuous casting is used, which affects the performance of the product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A high-strength motor vehicle-driven plate steel germolar co-casting production method, its chemical composition comprising: C: 0.15%, Si: 0.25%, Mn: 0.60%, P: 0.012%, S: 0.003 %, Cr: 0.70%, MO: 0.70%, Ni: 0.25%, V: 0.10%, margin is Fe and inevitable impurities; 300 mm × 400 mm of germillar co-casting machine is produced.

[0013] in:

[0014] The puller was 0.70 m / min, the crystalline heat flow density was 0.8 mW / m2;

[0015] The total water volume of the second cold area is 200L / min, and the 5-zone cooling is used to be 4: 3: 2: 1: 1;

[0016] The crystallizer electromagnetic stirring 200A × 2 Hz, two cold zone electromagnetic stirring 500a * 8 Hz, end electromagnetic stirring 500A × 6 Hz;

[0017] Under the light pressure of the solidifier, the total amount is 15 mm.

[0018] The non-surface crack of the production of the slab, low-altitude center loose and central segregation are less than 0.5, and there is no centralized hole.

Embodiment 2

[0020] A high-strength motor-driven plate steel germillary co-casting production method, its chemical composition includes: C: 0.18%, Si: 0.35%, Mn: 0.80%, P: 0.014%, S: 0.004 %, Cr: 1.00%, MO: 0.85%, Ni: 0.30%, V: 0.20%, margin is Fe and inevitable impurities; production of 350mm × 450 mm of section 350mm × 450 mm.

[0021] in:

[0022] The gecropolis is 0.60m / min, and the crystallizer is 1.00MW / m. 2 .

[0023] The total water volume of the second cold area is 150L / min; 4 cooling zones, 4 areas cooling each zone is 3: 2: 1: 1

[0024] The crystallizer electromagnetic stirring 350a × 2 Hz, the two-cold region electromagnetic stirred 800A × 8 Hz, the end electromagnetic stirred 800A × 6 Hz.

[0025] Under generic end pressure, the total amount of light pressure is 11mm.

[0026] The non-surface crack of the production of the slab, low-altitude center loose and central segregation are less than 0.5, and there is no centralized hole.

Embodiment 3

[0028] A high-strength motor-driven plate steel germolar co-casting production method, its chemical composition includes: C: 0.20%, Si: 0.55%, Mn: 1.00%, P: 0.015%, S: 0.005 %, Cr: 1.25%, MO: 1.00%, Ni: 0.35%, V: 0.30%, margin is FE and inevitable impurities; production of 450mm × 500 mm of cross section.

[0029] in:

[0030] The large square blank is 0.48 m / min, and the crystallizer heat flow density is 1.20mw / m. 2 .

[0031] The total water volume of the second cold area is 80L / min; 5 cooling zones, the 5-zone cooling region is 4: 3: 2: 1: 1.

[0032] The crystallizer electromagnetic stirring 500a × 2 Hz, the two-cold region electromagnetic stirring 1000a × 8 Hz, the end electromagnetic stirring 1100a × 6 Hz.

[0033] Under generic end, the total amount of light pressure is 8mm.

[0034] The non-surface crack of the production of the slab, low-altitude center loose and central segregation are less than 0.5, and there is no centralized hole.

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PUM

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Abstract

The invention discloses a bloom continuous casting production method of high-strength steel for a multiple unit brake disc. The high-strength steel comprises, by weight percent, 0.15-0.20% of C, 0.25-0.55% of Si, 0.60-1.00% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.70-1.25% of Cr, 0.70-1.00% of Mo, 0.25-0.35% of Ni, 0.10-0.30% of V, and the balance Fe and inevitable impurities. A bloom continuous casting machine with the section of 300-450 mm x 400-500 mm is adopted for production. Continuously cast blooms meeting the requirements are produced through heat flux density control of a continuous casting crystallizer, cooling intensity and specific water amount distribution of a secondary cooling zone, and parameters of crystallizer electromagnetic stirring, tail end electromagnetic stirring and soft reduction. Bloom continuous casting production can be achieved. The cast blooms are free of surface cracks. Low-magnification center porosity and center segregation are both less than Grade 1.0. Center shrinkage cavities are avoided.

Description

Technical field [0001] The present invention belongs to the field of metallurgical technology, and specifically, a large-strength co-casting production method for high strength motor vehicle braking plate steel. Background technique [0002] The high-speed rail train components are fast, the energy efficient, low energy consumption, low pollution and strong environmental adaptability is increasingly received at home and abroad. Under the high-speed brake conditions of high-speed rail, with a strong coupling of thermal stress and mechanical stress, the brake disc needs to have good thermal physics and heat dissipation characteristics, excellent room temperature and high temperature comprehensive mechanical properties and strong environmental adaptability. The motor vehicle is required to use a high yield strength, high toughness, and a large amount of alloying elements is needed. Due to the large amount of alloy, a structural production of a co-casting production is easy to produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/18B22D11/22C22C38/02C22C38/04C22C38/44C22C38/46
CPCB22D11/16B22D11/225B22D11/18C22C38/02C22C38/04C22C38/44C22C38/46Y02P10/20
Inventor 吴建永于湛刘晓彬李运辉王国柱
Owner NANJING IRON & STEEL CO LTD
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