Unlock instant, AI-driven research and patent intelligence for your innovation.

Nickel-saving austenitic stainless steel continuous line annealing and pickling production method

A technology of austenitic stainless steel and production method, which is applied in the production field of nickel-saving austenitic stainless steel, can solve problems such as broken strips, poor surface quality, and surface scratches, so as to reduce production costs, stabilize product performance, and improve finished products. rate effect

Pending Publication Date: 2022-02-18
SHANXI TAIGANG STAINLESS STEEL CO LTD
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, nickel-saving austenitic stainless steel uses 304 rolling, annealing and pickling parameters, which are prone to strip breakage, poor material quality, poor surface quality, loose coils, surface scratches, etc., which seriously affect the product yield.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nickel-saving austenitic stainless steel continuous line annealing and pickling production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. A nickel-saving austenitic stainless steel, the weight percentage of its chemical composition is: C: 0.054%, Si: 0.37%, Mn: 6.27%, Ni: 4.2%, Cr: 16.2%, P≤0.040%, S: ≤0.030%, Cu: 1.7%, N: 0.1%, the balance is Fe and unavoidable impurities. The material thickness is 0.7mm and the width is 1240mm.

[0034] The production method comprises the steps of:

[0035] Step 1: After uncoiling, first cut off the thickness transition part of the steel coil head, confirm that there is no parking roll mark of the rolling mill on the actual annealed part of the steel coil, and perform the same operation on the steel coil tail.

[0036] Step 2: Send the head of the steel coil in step 1 to the welding machine, and weld it with the tail of the previous coil. The welding method adopts double welding wheel resistance welding, the welding current is 12000A, and the welding speed is 15m / min.

[0037] Step 3: The welded nickel-saving austenitic stainless steel strip enters the degreasing s...

Embodiment 2

[0043]1. A nickel-saving austenitic stainless steel, the weight percentage of its chemical composition is: C: 0.065%, Si: 0.35%, Mn: 6.27%, Ni: 4.2%, Cr: 16.4%, P≤0.040%, S: ≤0.030%, Cu: 1.7%, N: 0.1%, the balance is Fe and unavoidable impurities. The material thickness is 1.0mm and the width is 1240mm.

[0044] The production method comprises the steps of:

[0045] Step 1: After uncoiling, first cut off the thickness transition part where the actual thickness of the head is ≥ 1.0mm, and the same operation is carried out for the tail of the steel coil.

[0046] Step 2: Send the head of the steel coil in step 1 to the welding machine, and weld it with the tail of the previous coil. The welding method adopts double welding wheel resistance welding, the welding current is 13000A, and the welding speed is 15m / min.

[0047] Step 3: The welded nickel-saving austenitic stainless steel strip enters the degreasing section for degreasing, and the temperature of the degreasing liquid i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
surface roughnessaaaaaaaaaa
thicknessaaaaaaaaaa
surface roughnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of cold-rolled steel coil annealing and pickling, in particular to a nickel-saving austenitic stainless steel continuous line annealing and pickling production method which comprises the following steps: step 1, after a nickel-saving austenitic stainless steel coil in a cold-rolled state is uncoiled, firstly, a thickness transition part of a material head of the steel coil is cut off cleanly, and the same operation is performed on a material tail of the steel coil; step 2, the steel coil material head in the step 1 is conveyed to a welding machine to be welded to the tail of the previous steel coil material; step 3, a welded nickel-saving austenitic stainless steel strip enters a degreasing section to be degreased; step 4, annealing is conducted; step 5, after high-temperature heat preservation is finished, the steel strip is cooled through air cooling and fog cooling; step 6, acid pickling is conducted; and step 7, a polishing roller combination is used for online leveling. By means of the method, continuous production of the nickel-saving austenitic stainless steel coil on a production line is achieved, and the problems of belt breakage, poor materials, poor surface quality, coil loosening, surface scratching and the like are avoided.

Description

technical field [0001] The invention relates to the technical field of annealing and pickling of cold-rolled steel coils, in particular to a production method of nickel-saving austenitic stainless steel. Background technique [0002] With the maturity of the domestic stainless steel market and the trend of subdividing steel grades, the demand for nickel-saving austenitic stainless steel as a substitute for 304 in the field of refrigerated containers is gradually increasing. Compared with 304 stainless steel, nickel-saving austenitic stainless steel has certain economic advantages in terms of mechanical properties and corrosion resistance. [0003] At present, nickel-saving austenitic stainless steel uses 304 rolling, annealing and pickling parameters, which are prone to strip breakage, poor material quality, poor surface quality, loose coils, surface scratches, etc., which seriously affect the product yield. Research and development of the present invention have successfull...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C23G1/08C23G5/00C22C38/58C22C38/42C22C38/02
CPCC21D1/26C23G5/00C23G1/085C23G1/086C22C38/58C22C38/42C22C38/02C22C38/001
Inventor 苏莹赵晋雷李旭初段维芳张斌
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD