CN101537425B

CN101537425B - Cold rolling technique of stainless steel plate with frosted surfaces

Info

Publication number: CN101537425B
Application number: CN2009100824937A
Authority: CN
Inventors: 孙宇辉; 赵志海; 胡国旗; 刘建伟; 姜智庆; 刘勤华
Original assignee: BEIJING METALLURGY ZHENGYUAN TECHNOLOGY Co Ltd
Current assignee: BEIJING METALLURGY ZHENGYUAN TECHNOLOGY Co Ltd
Priority date: 2009-04-21
Filing date: 2009-04-21
Publication date: 2011-06-01
Anticipated expiration: 2029-04-21
Also published as: CN101537425A

Abstract

The invention discloses a cold rolling technique of a stainless steel plate with frosted surfaces, belonging to the technical field of manufacturing of stainless steel plates. The invention mainly improves the original cold rolling technique, and the improved cold rolling technique comprises the following steps of: carrying out procedures of cold rolling, annealing, leveling on the hot rolling raw materials, achieving the effect of frosted surfaces without subsequent grinding on the surface, during cold rolling, strictly controlling the rolling speed of each pass, reducing rolling reduction of each pass gradually, strictly controlling the roughness of a roll and a leveling roll of the final pass of a rolling mill, carrying out recrystallization soften annealing by a bright annealing furnace, and eliminating yield point elongation by a leveling machine after discharged out of the furnace. Due to simple production technique, the invention not only has the surface approximate to the frost surface, and the properties of wear resistance, high temperature resistance and high strength and the like, but also has cheap price, low production cost and short production period. The improved cold rolling technique is widely applied to the field of electronic products, greatly saves the production cost and has strong market competitiveness.

Description

A kind of cold-rolling process of corrosion resistant plate of frosting

Technical field

The invention belongs to the manufacturing technology field of corrosion resistant plate, particularly the cold-rolling process of a kind of precise stainless steel strip of frosting is approached on the surface.

Background technology

At present, cold-rolled stainless steel sheet has been widely used in all kinds of electronic devices and components, and as LCD outer housing, host computer cabinet and hard disk shell etc., its common trait is that required stainless steel surfaces is the non-bright state near frosting.

The hard attitude plate of existing cold rolling 304 stainless steels is similar to frosting because of its surface of getting confused, characteristics such as it is high-strength, corrosion-resistant, high temperature resistant to hold concurrently, in the application of the said goods, occupied certain leading position, but 304 stainless steel compositions are because of containing a large amount of Ni elements, cause that it costs an arm and a leg, the cost height, and 304 hard attitude board production technologies are loaded down with trivial details, carrying out still need carrying out reroll after general cold rolling, the annealing, cleaning line clean surface ROLLING OIL and cross the straightening machine and adjust operations such as template, long, not environmental protection of production cycle has improved manufacturing cost greatly.430 stainless steels are not because of containing Ni, price is lower, but because technical limitations, existing cold rolling mill can only be produced 430 corrosion resistant plates of glossy surface, when being applied to electronic product casing, need to carry out milled processed to the surface again, promptly carrying out still needing polishing behind cold rolling, annealing, the cold-rolling process such as smooth, technology is relatively complicated.

Summary of the invention

The cold-rolling process that the purpose of this invention is to provide a kind of corrosion resistant plate of frosting, it is characterized in that, mainly be to improve cold-rolling process, it is cold rolling through breaking down and finish rolling to be about to the hot rolling raw material, annealing, after the smooth operation, the surface reaches the effect of frosting without follow-up grinding, when cold rolling strict control every time roll speed and working roll roughness, and reduce every time drafts one by one, the most important thing is to want strict control milling train final pass roll roughness between 0.3-0.4 μ m, rolling finishing after bright annealing furnace carries out 900 ℃ of-950 ℃ of crystallization soft annealings again, come out of the stove the back after planisher elimination yield point elongation, and smooth roller roughness will be between 0.4-0.5 μ m.

Described breaking down is from first passage to the, six passages, and it is 0.2-0.3% that every bloom pass will reduce drafts by passage; From the 7th passage to the end a time be the finish rolling period, its draught per pass gradually reduces 1%.

Described every time rolls speed and controls by slow, fast, slow form in the 80-200m/min scope.

Described working roll roughness is controlled to be Ra1.0 μ m-Ra0.9 μ m at bloom pass; Be controlled to be Ra0.8 μ m-Ra0.3 μ m at finishing pass.

The invention has the beneficial effects as follows cold-rolling process of the present invention, because of its production technology simply, not only finished surface approaches frosting, with stainless characteristic such as wear-resisting, high temperature resistant, high-strength, and low price, low, the easy processing of production cost, be widely used in the electronic product field, saved production cost greatly, the very strong market competitiveness has been arranged.

Description of drawings

Fig. 1 is technological process of production figure of the present invention.

The specific embodiment

The invention provides a kind of cold-rolling process of corrosion resistant plate of frosting, mainly be to improve cold-rolling process, be about to 430 hot rolling raw materials through cold rolling, annealing, smooth operation after, the surface reaches the effect of frosting without follow-up grinding, we claim that the stainless steel band (plate) on this surface is cold rolling 430 stainless steel 1D plates, and the present invention is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1, hot rolling stock roll 1 is when reversible Sendzimir mill group 2 is rolling, want strictness to control roughness, drafts and the mill speed of every time rolling working roll (roll) well, wherein roll control: preceding 4 passage roughness are the thick rolling system of Ra1.0 μ m; 5-7 passage roughness is that the shaping roll of 0.9 μ m is rolling, 8-9 passage roughness is that the roll of Ra0.8 μ m is rolling, the 10-11 passage is with the half thick rolling system of roughness between 0.4-0.5 μ m, and last passage must be that the E2B roller of 0.3-0.4 μ m is rolled with roughness; Drafts (deflection) control: first pass deformation is controlled at about 20%, it is about 0.3% that later every bloom pass (from first passage to the, six passages) will reduce drafts by passage, and draught per pass gradually reduces about 1% during to finishing pass (the 7th passage is a time to the end); The speed control system of rolling scope: first passage is rolled speed control between 80-100m/min, former passages are rolled speed, and every time can progressively increase, wherein second passage is controlled at the 120-150m/min scope, the 3rd passage is in the 150-180m/min scope, four-pass is controlled between the 180-200m/min, from this passage, later on every time rolls that speed progressively reduces or is constant, and the 5th passage is rolled speed in the 160-170m/min scope, and the 6th passage is rolled speed and is 160m/min, the 7th passage also is 160m/min, the 8th passage is reduced to 150m/min,, the 9th passage is rolled speed and is made as 140m/min, the tenth, ten a time are 120m/min, and it is 100m/min or following that last passage is rolled prompt drop.

Rolling finishing after vertical bright annealing furnace 3 carries out crystallization soft annealing again, vertical heater is divided into 6 districts, and the temperature in 1-6 district is 920 ℃, 930 ℃, 935 ℃, 935 ℃, 925 ℃, 920 ℃ successively, and annealing TV value is made as 6.4.

Come out of the stove the back after planisher 4 elimination yield point elongations, smooth flat a time of need, elongation control is in 8 ‰, roll-force 2000KN, planisher worker roller roughness requires finally to obtain finished product 5 after smooth operation is finished, promptly cold rolling 430 stainless steel 1D plates for Ra0.4～0.5 μ m.

Claims

1. the cold-rolling process of the corrosion resistant plate of a frosting, it is characterized in that, in the cold-rolling process of cold rolling 430 stainless steel 1D plates, with 430 hot rolling raw materials through cold rolling, annealing, smooth operation after, the surface reaches the effect of frosting without follow-up grinding, control every time when cold rolling and roll speed for to control by slow, fast, slow form in the 80-200m/min scope, control working roll roughness is for to be controlled to be Ra1.0 μ m-Ra0.9 μ m at bloom pass; Be controlled to be Ra0.8 μ m-Ra0.3 μ m at finishing pass; And the drafts that reduces every time one by one is that breaking down is from first passage to the, six passages, and it is 0.2-0.3% that every bloom pass will reduce drafts by passage; From the 7th passage to the end a time be the finish rolling period, its draught per pass gradually reduces 1%, the most important thing is to want strict control milling train final pass roll roughness between 0.3-0.4 μ m, rolling finishing after bright annealing furnace carries out 900 ℃ of-950 ℃ of crystallization soft annealings again, come out of the stove the back after planisher elimination yield point elongation, and smooth roller roughness will be between 0.4-0.5 μ m.