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A production method of high-quality special steel thin steel strip for measuring instruments

A technology for measuring instruments and production methods, which is applied in the field of cold rolling of steel sheets and strips, can solve problems such as inability to meet high-precision requirements, poor flatness of appearance flatness, large fluctuations in thickness tolerances, etc., and achieve good flatness of appearance flatness , product thickness tolerance fluctuation is small, the effect of product quality improvement

Active Publication Date: 2021-08-03
JIANGSU JIUTIAN PHOTOELECTRIC TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-quality special steel cold-rolled thin steel strips for measuring instrument accessories made by the existing technology have disadvantages such as large fluctuations in thickness tolerance, unstable performance, color difference on the surface, and poor flatness of the appearance of the plate, which cannot meet the needs of high-end measuring instruments. High-precision requirements for special steel thin steel strips

Method used

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  • A production method of high-quality special steel thin steel strip for measuring instruments
  • A production method of high-quality special steel thin steel strip for measuring instruments
  • A production method of high-quality special steel thin steel strip for measuring instruments

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The chemical degreasing liquid used in this embodiment is a commercially available product, the brand DOWELL-P502, and its main components are sodium hydroxide NaOH (≥51%), sodium carbonate NaOH 2 CO 3 , additives; the electrolytic degreasing solution is a commercially available product, the brand name DOWELL-P503, and the main components are sodium hydroxide NaOH (≥54%), sodium carbonate NaOH 2 CO 3 ,additive.

[0051] (1) In this embodiment, the key element content range of the raw material 65Mn is optimally controlled: the C content is 0.65-0.68%, the Si content is 0.2-0.3%, the Mn content is 1.0-1.2%, and the P content is ≤0.03%. The S content is ≤0.015%, the Ni content is ≤0.25%, the Cr content is ≤0.25%, and the Cu content is ≤0.25%.

[0052] (2) Annealing process: In this embodiment, the heating rate is reduced, the temperature of primary annealing and secondary annealing is appropriately increased, and the holding time is prolonged.

[0053] table 3

[0054] ...

Embodiment 2

[0093] The chemical degreasing solution and the electrolytic degreasing solution used in this embodiment are the same as those in Example 1.

[0094] The product prepared in this embodiment is a high-end measuring instrument with a thickness of 0.12mm and a width of 154mm, which is an excellent special steel strip.

[0095] The present embodiment adopts the following steps to prepare:

[0096] (1) Selection of raw materials: The thickness is 2.75mm, the width is 1250mm, the grade is 65Mn hot-rolled pickling coil steel strip, and its chemical composition: C content 0.67%, Si content 0.23%, Mn content 1.1%, P content 0.025 %, S content 0.012%, Ni content 0.20%, Cr content 0.21%, Cu content 0.19%.

[0097] (2) Slitting the raw material of hot-rolled pickled coils with a raw material slitting unit at a speed of 100m / min.

[0098] (3) The raw material of the hot-rolled pickled coil after slitting is cold-rolled for the first time with an 850 six-high reversing rolling mill, with ...

Embodiment 3

[0118] The chemical degreasing solution and the electrolytic degreasing solution used in this embodiment are the same as those in Example 1.

[0119] The product prepared in this embodiment is a high-end measuring instrument with a thickness of 0.10mm and a width of 154mm, which is an excellent special steel strip.

[0120] The present embodiment adopts the following steps to prepare:

[0121] (1) Selection of raw materials: The thickness is 2.75mm, the width is 1250mm, the grade is 65Mn hot-rolled pickling coil steel strip, and its chemical composition: C content 0.65%, Si content 0.2%, Mn content 1.0%, P content 0.021 %, S content 0.010%, Ni content 0.17%, Cr content 0.20%, Cu content 0.22%.

[0122] (2) Slitting the raw material of hot-rolled pickled coils with a raw material slitting unit at a speed of 120m / min.

[0123] (3) The raw material of the hot-rolled pickled coil after slitting is cold-rolled for the first time with an 850 six-high reversing rolling mill, with a...

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Abstract

The invention discloses a production method of a high-quality special steel thin steel strip for measuring instruments, and belongs to the technical field of cold rolling of steel strips. The method uses a hot-rolled pickled coil steel strip with a thickness of 2.75mm and a width of 1250mm as a raw material, and undergoes four times of cold rolling, three times of annealing and three times of cleaning to produce a steel strip with a thickness of 0.10-0.15mm. The high-end special steel thin steel strip for measuring instruments processed by the production method of the present invention has small fluctuations in product thickness tolerance, stable performance, no color difference on the surface, and good flatness in appearance. Compared with the process product quality of the prior art Significantly improved, it is suitable for industrial production and meets the high-quality requirements of high-end measuring instruments.

Description

technical field [0001] The invention belongs to the technical field of cold rolling of steel strips, and in particular relates to a production method of high-quality special steel thin steel strips for measuring instruments. Background technique [0002] At present, the high-quality special steel cold-rolled thin steel strips used in the production of measuring instrument accessories are all made of raw materials (hot-rolled coils) → pickling → recoiling → primary cold rolling → recoiling → primary annealing → recoiling → secondary cold rolling → Recoiling→edge trimming→secondary annealing→recoiling→three cold rolling→recoiling→three annealing→recoiling→fourth cold rolling→slitting→packing→storage. However, the high-quality special steel cold-rolled thin steel strips for measuring instrument accessories made by the existing technology have disadvantages such as large fluctuations in thickness tolerance, unstable performance, color difference on the surface, and poor flatness...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C21D8/02C21D1/26C25F1/06
CPCC21D1/26C21D8/0236C22C38/002C22C38/02C22C38/04C22C38/42C25F1/06
Inventor 李国忠路兴浩曾三荣
Owner JIANGSU JIUTIAN PHOTOELECTRIC TECH CO LTD
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