Hot rolling is a process of rolling performed above the recrystallization temperature, and cold rolling and hot rolling are opposite. The article mainly introduces the hot rolling mill product size, product specifications, product features and other related information.

1. Specifications

The dimensions of steel plates and steel strips shall comply with relevant regulations. The width of the steel plate may also be any size of 50 mm or any size of 10mm multiple. The length of steel plate length can be any size of 100mm or 50mm multiple, but the small length of the steel plate having the thickness of 4 mm or less shall not be less than 1.2 m, and the small length of the steel plate having the thickness greater than 4 mm shall not be less than 2m. Steel plates with the thickness of less than 30mm may have the thickness interval of 0.5 mm as required. According to the requirements, steel plates and strips of other sizes can be supplied through negotiation between the supplier and the buyer.

The specified irregularity is only applicable to steel plates with a lower limit of yield point not exceeding 460 N/mm², steel plates with yield points exceeding and tempered, and the large value of the unevenness is 1.5 times as specified in the table. The radius of the steel belt must not exceed 3 mm per meter. The trimmed steel plate shall be cut at a right angle. The cut and the boring position shall not cause the length and width of the steel plate to be smaller than the nominal size, and a small rectangle of the nominal size shall be guaranteed. The steel strip should be rolled into a roll.

Weight: Steel plates and strips are delivered at actual or theoretical weight. The theoretical weight is used to calculate the density of the steel, which is 7.85 g/cm3. Other steel grades are in accordance with the relevant standards.

2. The Composition of Hot Rolling Mill

The strip hot rolling mill consists of roughing rolling mills and finishing rolling mills. Rough rolling mills are divided into three types: semi-continuous type, 3/4 continuous type and full-continuous type.

2.1 The semi-continuous type has a scaling (removing oxide scale) rack and a reversible rack with vertical rollers.

2.2 3/4 continuous rack, in addition to the above rack, there are two racks arranged in series.

2.3 The fully continuous type consists of 6-7 racks. The finishing mill is composed of 5 to 7 continuous racks and coilers.

The strip hot rolling mill is named after the length of the roll body. The length of the roll body is more than 914 mm, which is called the wide strip rolling mill. The length of working roll body of finishing mill is 1700mm, which is called 1700mm hot strip mill. This mill can produce 1550mm wide strip coil.

There are four ways of hot strip rolling according to product width and production process: hot strip rolling with wide strip, reversible hot strip rolling with wide strip, hot strip rolling with narrow strip and hot strip rolling with planetary mill.