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Method for Preventing Bonding of Thin Gauge Austenitic Antibacterial Stainless Steel Cold Rolled Coils After Annealing

An antibacterial stainless steel and thin-gauge technology, which is applied in the field of preventing thin-gauge austenitic antibacterial stainless steel cold-rolled coils from bonding after annealing, can solve problems such as many bonding problems, unevenness, and bonding, and achieve the effect of avoiding bonding

Active Publication Date: 2019-07-23
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the cold-rolled coil has a very large radial thermal compressive stress between the layers after the cooling starts, the bonding phenomenon will inevitably occur between the layers, and the bonding part will be severely torn when the coil is uncoiled, resulting in local unevenness. The cold-rolled coil cannot be opened normally when the adhesion is serious
Thick gauge (thickness > 1.0mm) cold-rolled coils have greater mechanical rigidity, stronger ability to resist bending deformation, smaller and uniform interlayer pressure, less bonding problems, while thin gauge (thickness ≤ 1.0mm) Cold-rolled coils have more bonding problems, which seriously affect their normal production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Include the following steps:

[0026] (1) The weight percentage of steel plate composition is: C: 0.03%, Si: 0.55%, Mn: 1.35%, P: 0.025%, S: 0.001%, Cr: 17.95%, Ni: 8.5%, Cu: 3.80% ; The rest is Fe and unavoidable impurities.

[0027] (2) Annealing and pickling of hot-rolled coils, cold rolling, and annealing and pickling of cold-rolled coils

[0028] The thickness specification of the hot-rolled steel coil is 2.5mm, the width specification is 1219mm, the solution temperature of the steel coil is 1100°C, and the time is 2.5min / mm. 2 SO 4 Solution chemical pretreatment followed by HNO 3 +HF mixed acid for whitening treatment.

[0029] The annealed and pickled white coils are cold-rolled by using a 20-roller Sendzimir rolling mill, and the cold-rolled thickness specification is 0.8mm.

[0030] The cold-rolled steel coil with a thickness of 0.8mm has a solid solution temperature of 1100°C and a time of 2.5min / mm. Pickling is to firstly treat the steel coil with electr...

Embodiment 2

[0035] Include the following steps:

[0036] (1) The weight percentage of steel plate composition is: C: 0.025%, Si: 0.45%, Mn: 1.45%, P: 0.024%, S: 0.001%, Cr: 18.05%, Ni: 8.55%, Cu: 3.85% ; The rest is Fe and unavoidable impurities.

[0037] (2) Annealing and pickling of hot-rolled coils, cold rolling, and annealing and pickling of cold-rolled coils

[0038] The thickness specification of the hot-rolled steel coil is 2.5mm, the width specification is 1219mm, the solution temperature of the steel coil is 1100°C, and the time is 2.5min / mm. 2 SO 4 Solution chemical pretreatment followed by HNO 3 +HF mixed acid for whitening treatment.

[0039] The annealed and pickled white coils are cold-rolled by using a 20-roller Sendzimir rolling mill, and the cold-rolled thickness specification is 0.5mm.

[0040] The cold-rolled steel coil with a thickness of 0.5mm has a solid solution temperature of 1100°C and a time of 2.5min / mm. Pickling is to firstly treat the steel coil with elec...

Embodiment 3

[0045] Include the following steps:

[0046] (1) The weight percentage of steel plate composition is: C: 0.025%, Si: 0.45%, Mn: 1.45%, P: 0.024%, S: 0.001%, Cr: 18.05%, Ni: 8.55%, Cu: 3.85% ; The rest is Fe and unavoidable impurities.

[0047](2) Annealing and pickling of hot-rolled coils, cold rolling, and annealing and pickling of cold-rolled coils

[0048] The thickness specification of the hot-rolled steel coil is 3.0mm, the width specification is 1219mm, the solution temperature of the steel coil is 1100°C, and the time is 2.5min / mm. 2 SO 4 Solution chemical pretreatment followed by HNO 3 +HF mixed acid for whitening treatment.

[0049] The annealed and pickled white coils are cold-rolled by using a 20-roller Sendzimir rolling mill, and the cold-rolled thickness specification is 0.5mm.

[0050] The cold-rolled steel coil with a thickness of 1.0mm has a solid solution temperature of 1100°C and a time of 2.5min / mm. Pickling is to firstly treat the steel coil with elect...

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Abstract

The invention discloses a method for avoiding bonding of a thin-gauge austenite antibacterial stainless steel cold-rolled coil after annealing. The method comprises the following steps that a hot-rolled coil plate is subjected to annealing and acid pickling, the temperature ranges from 1,050 DEG C to 1,150 DEG C, and the time ranges from 2 min / mm to 3 min / mm; steel coil cold rolling is carried out; and a cold-rolled coil plate is subjected to annealing and acid pickling, the temperature ranges from 1,050 DEG C to 1,150 DEG C, and the time ranges from 2 min / mm to 3 min / mm; a cold-rolled coil iscushioned with a high-silica cloth coil, and curling tension ranges from 15 N / mm<2> to 50 N / mm<2>; the curled cold-rolled coil plate is put in a total hydrogen type bell furnace to be subjected to aging antibacterial treatment, and the total time of the bell furnace from temperature increase to heat preservation to temperature decrease ranges from 48 h to 50 h; and the cold-rolled coil plate obtained after antibacterial treatment of the bell furnace is uncoiled, and the cold-rolled coil plate and high-silica cloth are separated. According to the treatment method, the problem of bonding of thethin-gauge austenite antibacterial stainless steel cold-rolled coil after antibacterial annealing can be effectively solved.

Description

technical field [0001] The invention relates to a method for preventing thin-gauge austenitic antibacterial stainless steel cold-rolled coils from sticking after annealing. Background technique [0002] 304 copper-containing austenitic antibacterial stainless steel is based on 304 stainless steel, by adding supersaturated copper element and undergoing low-temperature aging treatment, the matrix precipitates a copper-rich phase that has an inhibitory effect on bacteria to achieve antibacterial effect. On the basis of ensuring the antibacterial performance, in order to obtain the deep drawing performance equivalent to 304, in actual industrial production, the cold-rolled coil of the finished thickness is usually treated with an all-hydrogen bell furnace, and the temperature range is 800~810℃ ℃, the bell furnace takes 48-50 hours from heating up, keeping warm to cooling down. Since the cold-rolled coil has a very large radial thermal compression stress between the layers after...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/58C22C38/42C21D8/02C21D1/70
CPCC21D1/70C21D8/0236C21D8/0247C21D2211/001C22C38/02C22C38/04C22C38/42C22C38/58
Inventor 张威王琦曾莉李国平王志斌
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD