钢材批发公司的槽钢分普通槽钢和轻型槽钢。热轧普通槽钢的规格为5-40#。经供需双方协议供应的热轧变通槽钢规格为6.5-30#。槽钢按形状又可分为4种：冷弯等边槽钢、冷弯不等边槽钢、冷弯内卷边槽钢、冷弯外卷边槽钢。槽钢的材质为Q235A碳素钢。槽钢主要用于建筑结构、幕墙工程、机械设备、车辆制造、固定盘柜和其它工业结构，槽钢还经常和工字钢配合使用。在使用中要求其具有较好的焊接、铆接性能及综合机械性能。

The channel steel of steel wholesale companies is divided into ordinary channel steel and light channel steel. The specifications of hot-rolled ordinary channel steel are 5-40 #. The specifications of hot-rolled flexible channel steel supplied through agreement between the supply and demand parties are 6.5-30 #. Channel steel can be divided into four types according to its shape: cold-formed equal edge channel steel, cold-formed unequal edge channel steel, cold-formed inner rolled edge channel steel, and cold-formed outer rolled edge channel steel. The material of the channel steel is Q235A carbon steel. Channel steel is mainly used in building structures, curtain wall engineering, mechanical equipment, vehicle manufacturing, fixed cabinets, and other industrial structures. Channel steel is often used in conjunction with I-beams. In use, it is required to have good welding, riveting performance, and comprehensive mechanical properties.

热镀锌槽钢，按镀锌工艺的不同可以分为热浸锌槽钢和热吹镀锌槽钢，是将除锈后的钢件浸入440~460℃左右融化的锌液中，使钢构件表面附着锌层，从而起到防腐的目的。

Hot dip galvanized channel steel can be divided into hot-dip galvanized channel steel and hot-blown galvanized channel steel according to different galvanizing processes. It involves immersing the derusted steel parts in molten zinc at around 440~460 ℃ to attach a zinc layer to the surface of the steel components, thereby achieving the purpose of corrosion prevention.

镀锌槽钢工艺流程：原料检验→酸洗→清洗→助锌→烘干→镀锌→冷却→钝化→清洗→成品检验→检验打包等。

The process flow of galvanized channel steel: raw material inspection → acid washing → cleaning → zinc assistance → drying → galvanizing → cooling → passivation → cleaning → finished product inspection → inspection and packaging, etc.

按照习惯往往根据镀前处理方法的不同把热镀锌工艺分为线外退火和线内退火两大类。

According to customs, hot-dip galvanizing processes are often divided into two categories based on different pre-treatment methods: offline annealing and online annealing.

线外退火就是热轧或冷轧钢进入热镀锌作业线之前，先在抽底式退火炉或罩式退火炉中进行再结晶退火，这样，镀锌线就不存在退火工序了。钢材在热镀锌之前须保持一个无氧化物和其他脏物存在的洁净的纯铁活性表面。这种方法是先由酸洗的方法把经退火的表面氧化铁皮清除，然后涂上一层由氯化锌或由氯化铵和氯化锌混合组成的溶剂进行保护，从而防止钢材再被氧化。线内退火就是由冷轧或热轧车间直接提供带卷作为热镀锌的原板，在热镀锌作业线内进行气体保护再结晶退火

Off line annealing refers to the recrystallization annealing of hot-rolled or cold-rolled steel in a bottomed annealing furnace or bell type annealing furnace before entering the hot-dip galvanizing line. In this way, there is no annealing process in the galvanizing line. Before hot-dip galvanizing, steel must maintain a clean, pure iron active surface free of oxides and other dirt. This method involves first removing the annealed surface iron oxide scale by acid washing, and then applying a layer of zinc chloride or a solvent composed of ammonium chloride and zinc chloride for protection to prevent the steel from being oxidized again. In line annealing refers to the gas protected recrystallization annealing of hot-dip galvanized raw plates directly provided by the cold rolling or hot rolling workshop as coils