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2024-05-16 00:00:00.0

The group’s new European standard products are coming! The trial rolling of hot-rolled steel coil S500MC for high-strength galvanized structures was successful!

Recently, the group's hot rolling mill S500MC European standard high-strength galvanized structural steel was successfully trial-produced with the full cooperation and unremitting efforts of the technical team and production units, the product performance, surface dimensions, and appearance quality tests all passed.

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2024-05-16 00:00:00.0

Baotou Steel Supplies 22,600 Tons of Rails for the Hungary-Serbia Railway Project, Supporting the Construction of the Belt and Road

Baotou Steel supplies 22,600 tons of rails for the Hungary-Serbia railway project, supporting the construction of the Belt and Road.

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2024-05-14 00:00:00.0

Shougang Jingtang New Energy Heavy Truck Phase II Charging Station Completed and Put into Operation

Recently, the second phase of Shougang Jingtang New Energy Heavy Truck Charging Station was officially completed and put into operation, marking a new level of Jingtang’s clean transportation work and making the business card of the green development enterprise brighter.

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2024-05-13 00:00:00.0

Baotou Steel Co., Ltd. Successfully Trial-produced 800 MPa Hydropower Steel

Baotou Steel Co., Ltd. successfully trial-produced 800 MPa hydropower steel.

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2024-05-10 00:00:00.0

The non-oriented silicon steel annealing furnace carbon reduction and pollution reduction upgrade project of Baogang Rare Earth Steel Cold Rolled Plate Plant was completed and put into operation

On May 9, the completion ceremony of the carbon reduction and pollution reduction upgrade project of the non-oriented silicon steel annealing furnace of Baotou Iron & Steel Co., Ltd.

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2024-05-08 00:00:00.0

Jingang Group successfully trial-produced new product Q235B-DB+Z for galvanized high-strength packing belts

Recently, the group's new product Q235B-DB+Z, a galvanized high-strength strapping steel, was successfully trial-produced, its surface quality and mechanical properties are all qualified, once again demonstrating the group's strong technical strength and innovation capabilities.

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2024-05-08 00:00:00.0

Ansteel Group’s Automotive Steel was Exhibited at the 2024 China Smart Automotive Technology Exhibition

Recently, Ansteel Group's automotive steel was exhibited at the 2024 China Smart Vehicle Technology Exhibition.

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Short News

2024-05-20 17:01:12.0

< On May 20, the price of cold-rolled steel plates in Foshan showed a slight upward trend. SPCC (ASTM A1008 CS) Liugang 1.5*1250*2500mm 606.19, up 1.38. (USD/ton)

2024-05-20 17:00:08.0

< On May 20, the price of galvanized square & rectangular tubes in Handan showed a slight upward trend. Q235 (ASTM A36 Gr.D) Zhengda 50*100*3.75 (hot-dip galvanizing) 625.57, up 2.77. (USD/ton)
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2024-05-20 16:59:02.0

< On May 20, the price of 300 series cold-rolled stainless steel coil in Foshan remained stable. 304/2B TISCO 1.2*1219*C (slit edge) 1992.96. (USD/ton)

2024-05-20 16:57:46.0

< On May 20, the price of hard steel wire in Liaocheng rose slightly. 45-55# (ASTM 1045-1055) Weifang Special Steel Φ5.5 (hot rolling) 584.05, up 5.54. (USD/ton)

2024-05-20 16:43:32.0

< On May 20, the price of bridge steel plate has remained stable in Anyang. Q345qD (ASTM A709 Grade 50) 40 mm 726.80 (USD/ton)
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2024-05-20 16:43:05.0

< On May 20, the price of wear-resistant steel plate has remained stable in Tangshan. NM400 (AR400) 30 mm 729.57 (USD/ton)
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Answers

What do common annealing processes include?
① Complete annealing. ② Spheroidizing annealing. ③ Isothermal annealing. ④ Recrystallization annealing. ⑤ Graphitization annealing. ⑥Diffusion annealing. ⑦ Stress relief annealing.
What is the purpose of the annealing process for steel?
① Improve or eliminate structural defects and residual stress caused by steel casting, forging, rolling, and welding processes to prevent workpiece deformation and cracking.

② Soften the workpiece for cutting.

③ Refine the grains and improve the structure to improve the mechanical properties of the workpiece.

④ Prepare the structure for final heat treatment (quenching and tempering).
What are the main types of inspection equipment for color-coated board coating quality control?
The commonly used inspection equipment on the color-coated board production line must meet the inspection tests required by the national standards. Therefore, the experimental equipment of different color-coated board manufacturers is the same, and they are the most commonly used ones listed below:
1. Thermometer-air thermometer and surface thermometer.
2. Hygrometer.
3. Surface profiler or comparator.
4. Paint viscometer.
5. Thickness gauge-wet film thickness gauge and dry film thickness gauge.
6. Coating gloss and pigment detection equipment.
7. Adhesion tester.
8. T-bend tester.
9. Impact tester.
10. Pencils of various hardness.
11. Other commonly used solution titration instruments.


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