Hot dip galvanized alloy ingot for galvanizing narrow strip steel

Abstract

The invention provides a hot dip galvanized alloy ingot for galvanizing narrow strip steel. The hot dip galvanized alloy ingot comprises the components of, by weight, 1.2-1.4% of aluminum, 0.18-0.22%of antimony, 0.004% or the less of iron, 0.004% or the less of lead, 0.002% or the less of copper, 0.002% or the less of cadmium, and the balance zinc. According to the hot dip galvanized alloy for the narrow strip steel, fluidity of zinc bath can be obviously improved, the 'slag adhering' phenomenon of galvanized plates can be effectively reduced, the slag rate is reduced, and surface smoothnessof coatings is improved. The zinc alloy grade is RZ28, and the ingot weight is 1000 + / - 100kg, the ingot shape of the zinc alloy is of a 'T'-shaped cuboid with two symmetrical ear warps, the bottom ofthe cuboid is planar, lifting holes are formed in the ear warps, and the four sides are inclined planes, so that the cuboid is in a big-end-up shape.

Description

technical field [0001] The invention belongs to the field of hot-dip galvanized alloys, in particular to a hot-dip galvanized alloy ingot used for galvanizing narrow strip steel. Background technique [0002] With the development of hot-dip galvanizing industry at home and abroad, the zinc bath used has been improved from pure zinc bath to zinc alloy bath. The zinc bath used for hot-dip galvanizing of narrow-strip steel is prepared with zinc alloy at the production site. Zinc baths are prepared by combining small zinc ingots with zinc-aluminum adjustment alloys. Since the aluminum content of the existing zinc alloy is only 0.2-0.4%, which is relatively low, the hot-dip galvanizing process using it to prepare a narrow-band galvanized zinc bath still has "dross" on the plate surface after plating, and the rate of galvanized dross is as high as 30%. % and so on. [0003] In addition to adding zinc-aluminum adjustment alloys, usually narrow-band galvanizing manufacturers also...

AI Technical Summary

Problems solved by technology

For narrow-band galvanizing, the production capacity is relatively small, and the volume of equipment used for galvanizing is also small, generally 20-40t. For example, when using 20-25kg small hot-dip galvanized alloy ingots, the frequency of adding The quantity is difficult to control, and the labor intensity is high; and the surface area of ​​the alloy ingot is large, and the output rate of zinc oxide slag is high, which increases the production cost of the galvanizing factory and is not conducive to the control of the production process

If the weight of a single ingot exceeds 1t, the specific surface area is relatively small, but it is difficult for the user to add the zinc pot, and it is easy to cause fluctuations in the temperature of the zinc bath. For the alloy ingot production plant, it has the advantages of convenient production and stacking in the warehouse Safety, storage space saving, convenient hoisting, and anti-theft advantages during transportation. There is no ingot type that is beneficial to both in the market.

Images