Date: 2025/7/8
Category: Metallurgical encyclopedia terms
Views: 372
1.Selection and Specifications of Continuous Casting Billets for Steel Rails
Domestic standards stipulate that the ratio of the finished rail cross-sectional area to the billet cross-sectional area should be no less than 1:8 or 1:9. In production, a compression ratio below 1:11 is generally used. If the casting blank quality is good and internal defects are minimal, a smaller compression ratio can be employed to produce high-quality rails.
Studies indicate that a width-to-height ratio below 1.5 for the rail billet is preferable, as it ensures stable internal quality.
2.Examples of Rail Billets
2.1 Raw Materials for Universal Rail Production Line #1
2.2 Raw Materials for Universal Rail Production Line #2
Bloom Cross-Sections:
BB1: 555 mm × 440 mm × 105 mm, 969 kg/m
BB2: 730 mm × 370 mm × 90 mm, 891 kg/m
BB3: 1024 mm × 390 mm × 120 mm, 1461 kg/m
BB4: 350 mm × 290 mm × 100 mm, 543 kg/m
Rectangular Billet Cross-Section: BL1: 280 mm × 380 mm, 825 kg/m
Billet Length: 4.35 m ~ 13.6 m
Maximum Billet Weight: 19472 kg
2.3 Raw Materials for Universal Rail Production Line (2+2+2+1 Mill Configuration)
Rectangular Billet Cross-Sections: 280 mm × 325 mm, 280 mm × 380 mm, 500 mm × 200 mm
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