A production method of ultra-high-strength heat-resistant and corrosion-resistant strapping

Abstract

The invention discloses a production method of an ultra-high-strength heat-resistant and corrosion-resistant bundling belt. The production method comprises the following steps: by taking 1Cr11MoV as a raw material steel type, performing cold rolling; uncoiling, splitting and deburring the cold rolled raw material, and then performing high-temperature austenization; performing oil bath quenching; performing alkaline liquid quenching, wherein a quenching medium is an aqueous solution of NaOH of which the concentration is 30-40% and NaNO2 of which the concentration is 10-15%; performing conventional water washing, and then tempering; naturally air-cooling to room temperature; and coiling. According to the bundling belt produced by using the production method disclosed by the invention, the tensile strength is not less than 1100MPa, the percentage elongation is not less than 9%, and no layered brittle fracture phenomenon can be caused, so that good mechanical performance can be achieved; after the bundling belt is placed in a high-temperature environment at 650-700 DEG C for 120 hours, the tensile strength of the bundling belt can maintain more than 90% of an initial value, and the surface oxidation area cannot exceed 2%, so that good heat resistance can be achieved; and after the bundling belt is placed in a 1mol / L H2SO4 or NaOH solution for 168 hours, the surface corrosion area of the bundling belt cannot exceed 2%, so that good corrosion resistance can be achieved. Products produced by using the method disclosed by the invention can completely meet the requirements for bundling and packaging objects with heavy weight and complex geometrical shapes in integral heat treatment and surface treatment processes.

Description

technical field [0001] The invention relates to a production method of a strap, in particular to a production method of an ultra-high-strength heat-resistant and corrosion-resistant strap. Background technique [0002] Ultra-high-strength heat-resistant and corrosion-resistant strapping is a high-value-added cold-rolled deep-processing product, which is suitable for bundling and packaging of objects with large weight and complex geometric shapes for overall heat treatment and surface treatment, and generally should have excellent mechanical properties , heat resistance and corrosion resistance. [0003] Many objects with heavy weight and complex geometry, such as steel ingots, ship anchors, tractor tracks, etc., are subjected to heat treatment and surface treatment. Due to too many dead angles, bends, and convex and concave places, manual and machine operations often cannot cover them all, and they need to be sent as a whole. It is necessary for the corresponding strapping ...

AI Technical Summary

Problems solved by technology

This method is relatively simple, but it also has very obvious disadvantages: first, the process flow is relatively long, and it often needs to be assisted by additional coating, electroplating, hot-dip, and spraying equipment, and the production cost is high; The physical and chemical properties of the substrates are inconsistent. After a long period of high-intensity heating or corrosion, the bonding force will deteriorate, and aging, cracking, and falling off will easily occur, which will seriously affect the service life of the strapping; the third is the coating or coating. The thickness of the layer is often large, generally up to 50~100 µm. After the strap enters the automatic strapping machine, the phenomenon of tape jamming often occurs, which greatly reduces the production efficiency

However, this process also has an obvious disadvantage: a small amount of oil is likely to remain on the surface of the steel strip after quenching, which is difficult to clean and will affect the surface quality of the product; at the same time, the residual oil is also prone to burning during tempering, causing a fire ACCIDENT

However, due to the strong cooling capacity, large internal stress is caused, the product is prone to cracking, and the product cannot be guaranteed to have a good shape.

Images