After passing the inspection with LMMGROUP, a trial plan was proposed for the company's high-speed steel rolls in May 2019. The planned number is 4 pairs (8 pieces), and the trial has been completed.
Although the price of LMMGROUP is 1.22 times that of the current rolling stock, through this trial, the data shows that the amount of steel passing through is more than 1.3 times higher than the current rolling stock, and the rolling groove wear of the off-line rolling is better than the current rolling stock. If Long-term use in batches also reduces the amount of turning per turn and increases the number of rolls used.
For the trial specification, we chose the medium 14 specification with a higher accident rate, because the advantages of the roll were not fully exerted due to batch reasons and the impact of production accidents. According to the trial results, it is inferred that the rolling series will be better when used in 16-20 specifications.
A STEEL
10 сентября 2015 года в процессе прокатки на сталепрокатном стане был проведен эксперимент по прокатке быстрорежущей стали на первой линии C12 с четырьмя проходами, а на линии C14 — с тремя проходами (K1, K2, K3 и K4). По результатам эксперимента, среднее количество стали, проходящей через прокатный стан LMMGROUP, составляет около 50-60% от количества легированной стали, используемой для прокатки. Сложность обработки быстрорежущей стали низкая, а себестоимость обработки ниже, чем у легированной стали. Наш завод может обеспечить стандартную обработку.
G STEEL
LMMGROUP provides our factory with 8 @380×650 high-speed steel rolls for K1 (finishing), K2 (pre-finishing), K3 (slicing), K4 (pre-slicing), which are used to make 12mm rebar. After the first online use: K1 single-channel steel throughput averaged 410 tons, K2 single-channel steel throughput averaged 840 tons, K3 single-channel steel throughput was 2860 tons, and K4 single-channel steel throughput was 2910 tons. There is no abnormal condition in the groove, and the hardness of the wheel is uniform, which is convenient for the repair and processing of the groove. During the period, LMMGROUP sent relevant technical personnel to follow up and guide on-site, and the effect was better in our factory.
J STEEL
1. According to the use situation, the use of cutting passes is more obvious, from the use of one groove per shift to the use of 3 shifts for one groove, which greatly reduces the parking time of the shift and the cost of using rolls, Reduce roll changes on night shifts.
2. High-speed steel rolls have good wear resistance, which is more obvious in the use of 15# rolls. During the production process, the strip shape control is stable, the gap between the rolls is large, and the negative deviation fluctuation is small, which is very useful for improving the quality of the finished product. good improvement.
3. At present, the ordinary roll is 0.55 yuan/ton, and the use of high-speed steel is 0.33 yuan/ton, which can greatly reduce the cost and increase the profit of the workshop.
E STEEL
The trial data shows that the ∮370mm high-speed steel roll produced by LMMGROUP has far exceeded the single-groove assessment value of 1,500 tons in the "Roll Ordering Technical Agreement", and the effect is good.
A STEEL
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