CN103320589A

CN103320589A - Method for preventing nickelic steel billet from being oxidized in heating process

Info

Publication number: CN103320589A
Application number: CN2013102317666A
Authority: CN
Inventors: 李靖年; 刘浩岩; 张健; 王若钢; 李新玲; 王明林; 张紫茵; 丛津功; 陈付振; 孙铁彪
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 2013-06-11
Filing date: 2013-06-11
Publication date: 2013-09-25
Anticipated expiration: 2033-06-11
Also published as: CN103320589B

Abstract

The invention provides a method for preventing a nickelic steel billet from being oxidized in a heating process. The method comprises the following steps of: wrapping the steel billet by using a cold-rolled sheet, firmly strapping the steel billet by using a strapping tape or covering the cold-rolled sheet on the upper and lower surfaces of the steel billet, and fixing the cold-rolled sheet on the steel billet by using a shot-welding way; putting the steel billet into a furnace, and then, normally heating so that the cold-rolled sheet and the strapping tape are automatically melted in the heating process; and clearing residues on the surface of the steel billet by using high-pressure water after the steel billet is taken out of the furnace, and then, normally rolling the steel billet. By using the method, the direct contact between air and the surface of the steel billet can be avoided, so that the continuous oxidation degree on the surface of the steel billet is delayed, the thickness of an oxidation layer is reduced, the burn out rate of the nickelic steel billet in the heating process is reduced, the workload for surface treatment is reduced, and the surface quality of a nickelic steel product is improved.

Description

A kind of method that prevents the oxidation of nickelic steel billet heat-processed

Technical field

The invention belongs to the steel rolling process technical field, particularly a kind of for the method for the steel billet that reduces high Ni steel grade in the heat-processed oxidation.

Background technology

Surface oxidation is unavoidable problem in the plate of moderate thickness blank heating process, can remove the iron scale that forms in the heat-processed clean by high pressure water for common steel billet.But for the blank of special substances such as High Nickel Steel, because the iron scale densification, iron scale is connected closely with the blank matrix, relies on high pressure water can't remove the iron scale that forms in the clean heat-processed fully.The iron scale of not disposing will be pressed into surface of steel plate in the follow-up operation of rolling, form surface crater, pit, have a strong impact on the product appearance quality, can save by reconditioning, and the steel plate visual appearance is bad after increase manufacturing cost and the reconditioning.In addition, do not remove the clean iron scale frictional coefficient in can the influence of rolled process, cause occurring in the steel plate rolling process seriously upwarping or button phenomenon down, steel plate can't be finished rollingly when serious, will produce rolling waste product.

Summary of the invention

The invention provides a kind of method that prevents the oxidation of nickelic steel billet heat-processed, its purpose is intended to reduce oxidated layer thickness, reduces the burn out rate of nickelic steel billet heat-processed, reduces the work for the treatment of amount, improves the High Nickel Steel product surface quality.

For this reason, the solution taked of the present invention is:

A kind of method that prevents the oxidation of nickelic steel billet heat-processed, its concrete grammar is:

1, desire is heated steel billet and wrap up with thickness 0.6-1.2mm cold rolled sheet, and tie up firmly with strapping tape, perhaps cover the upper and lower surface of desire heating steel billet with thickness 0.6-1.2mm cold rolled sheet, and with the mode of spot welding cold rolled sheet is fixed on the steel billet.

2, the steel billet that coating is handled well is sent into process furnace and is carried out normal heating, and cold rolled sheet and strapping tape be fusing voluntarily in heat-processed.

3, after the steel billet that heats was come out by process furnace, it was clean to utilize high pressure water that the residue of billet surface is removed, and carries out normally rolling then.

Beneficial effect of the present invention is:

Owing to coated cold rolled sheet in the steel billet outside, can effectively avoid air to contact with the direct of billet surface, thereby delay the lasting degree of oxidation of billet surface, reduce oxidated layer thickness, reduce the burn out rate of nickelic steel billet heat-processed, reduce the surface treatment workload, improve the High Nickel Steel surface quality of products.Utilize this method to produce High Nickel Steel, can reduce the steel plate reconditioning quality more than 30%, improve rolling lumber recovery more than 20%.

Description of drawings

Fig. 1 ties up parcel steel billet synoptic diagram.

Among the figure: strapping tape 1, snap close 2, edge protector 3, cold rolled sheet 4, steel billet 5.

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

The present invention prevents that the concrete steps of the method for nickelic steel billet heat-processed oxidation from being:

1, the cold rolled sheet 4 that desire is heated steel billet 5 usefulness thickness 1.0mm wraps up, and does not stay any slit as far as possible, reduces the possibility that contacts with air.Tie up to individual three roads in length and breadth with strapping tape 1 again, and on the edges and corners pad of the steel billet 5 that contacts with strapping tape 1 edge protector 3; Then by snap close 2 with strapping tape 1 tension, with excluding air to greatest extent with prevent from being scattered.

Another kind of method for coating is: cover the upper and lower surface that desire heats steel billet 5 with thickness 0.8mm cold rolled sheet 4, and with the mode of spot welding cold rolled sheet 4 is weldingly fixed on the steel billet 5, come off in the handling process to prevent cold rolled sheet 4.

2, the steel billet of coating being handled well 5 is sent into process furnace and is carried out normal heating, and strapping tape 1, snap close 2, edge protector 3 and cold rolled sheet 4 be fusing voluntarily in heat-processed.

3, after the steel billet 5 that heats is come out by process furnace, remove the residue on steel billet 5 surfaces clean by high pressure water; If the situation that exists strapping tape 1 not melt fully as yet, the hook of available stock is dragged it, can carry out normally rolling then.

Claims

1. a method that prevents the oxidation of nickelic steel billet heat-processed is characterized in that, concrete grammar is:

(1), desire being heated steel billet wraps up with thickness 0.6-1.2mm cold rolled sheet, and tie up firmly with strapping tape, perhaps cover the upper and lower surface of desire heating steel billet with thickness 0.6-1.2mm cold rolled sheet, and with the mode of spot welding cold rolled sheet is fixed on the steel billet;

(2), steel billet that coating is handled well sends into process furnace and carries out normal heating, cold rolled sheet and strapping tape be fusing voluntarily in heat-processed;

(3), after the steel billet that heats comes out by process furnace, it is clean to utilize high pressure water that the residue of billet surface is removed, and carries out normally rolling then.