Basic knowledge of spring

Ordinary low carbon steel wire rod without twist control and hot rolling (zbh4403-88) is made by controlling cooling after rolling by high-speed wire rod mill without torsion. The material is the same as that of ordinary wire. However, it has the advantages of high dimensional accuracy, good surface quality and high mechanical properties.
Main uses: no twist controlled cooling, hot rolling wire rod dimensional accuracy is divided into a, B, C three levels. A. The accuracy of grade B and C is suitable for wire drawing, construction, packaging and welding rod. The accuracy of grade B and C is suitable for processing bolts, screws and nuts.

High quality carbon steel wire rod (gb4354-84), high quality carbon steel wire rod is rolled with high quality carbon structural steel. It is one of the most widely used wire rod varieties.
Main uses: high quality carbon steel wire rod is mainly used for processing and manufacturing carbon spring steel wire, oil quenched and tempered carbon spring steel wire, prestressed steel wire, high-strength high-quality carbon structural steel wire, galvanized steel wire, galvanized stranded wire rope, etc.

High quality carbon steel non torsion controlled cooling and hot rolling wire rod (zbh44002-88), high-quality carbon steel non torsion controlled cooling and hot-rolled wire rod is rolled by torsion free high-speed wire rod mill, and controlled cooling treatment is adopted after rolling. Compared with high quality carbon steel wire rod, it has high dimensional accuracy, good surface quality and high mechanical properties.

Main application: the main application is the same as high quality carbon steel wire rod. It is commonly used in manufacturing carbon spring steel wire, oil quenched and tempered carbon spring steel wire, prestressed steel wire, high quality carbon structural steel wire, galvanized steel wire, etc.

The wire rod for rope steel wire (yb349-64) is one of high-quality hot-rolled carbon structural steel.
Main application: wire rod for rope steel wire can be made of high quality carbon structural steel grade 35, 40, 45, 55, 60, 65, 70, 75, 80 and 85. The chemical composition meets the requirements of gb699 (technical conditions for high quality carbon structural steel).

The rope making steel wire is made of non torsion controlled cooling and hot rolling wire rod (zbh44004-88). The rope making steel wire is made of non torsion controlled cold and hot rolling plate and high quality carbon structural steel, which is rolled on the torsion free wire rod mill and controlled cooling after rolling. This kind of wire rod has high dimensional accuracy, good surface quality and superior mechanical properties.

Main uses: mainly used for drawing rope steel wire and steel strand steel wire.
Carbon electrode steel wire rod (gb3429-82), carbon electrode steel wire rod is made of low-carbon high-quality carbon structural steel.

Main uses: mainly used for manufacturing manual arc welding core.
Carbon electrode steel non torsion controlled cooling and hot rolling wire rod (zbh44005-88), carbon electrode steel non torsion controlled cooling and hot rolling wire rod are made by rolling on blocking torsion wire mill and controlled cooling after rolling. It is a kind of high quality electrode steel wire rod with high dimensional accuracy, good surface quality and superior performance.

Main application: mainly used for manufacturing carbon steel hot-rolled disk strip with coating, welding rod and steel core.
Hot rolled alloy steel (gb3077) is used as structural steel rod. The alloy structural steel has 26 steel groups and 78 steel grades. According to the requirements of the demander and different uses, each manufacturer selects various brands for production.
Main uses: alloy structure hot-rolled wire rod is mainly used for drawing steel wire, metal products and structural parts.
Carbon tool steel hot-rolled wire rod (GB 1298-86). Carbon tool steel is made of high-quality or high-quality high-carbon steel. Good processability and wear resistance, low price.

Main uses: mainly used for drawing steel ratio and manufacturing tools.
Alloy tool steel is a kind of steel made by adding chromium, tungsten, molybdenum, vanadium, silicon, manganese, nickel and cobalt to the matrix of carbon tool steel. Compared with carbon tool steel. It has the characteristics of good hardenability, small cracking tendency in heat treatment, high wear resistance and heat resistance. Hot rolled alloy tool steel wire rod is made of 33 grades of alloy tool steel with 5 steel groups. It is produced by Dalian steel works, Benxi Steel Works and Shaanxi steel works.
Main uses: suitable for making measuring tools, cutting tools, cold and hot working dies, impact resistant tools, etc.

Spring steel hot-rolled wire rod (gb1222-84) spring steel is used to make springs or other elastic components. Springs and elastic elements mainly use their elastic properties to absorb and store energy, so as to alleviate vibration, impact or make parts complete some actions. Because it works under the condition of impact, vibration or long-term uniform periodic alternating stress, spring steel is required to have high yield strength, especially high yield ratio (yield strength to tensile strength), high elastic fatigue strength, high temperature resistance and corrosion resistance. Spring steel should also have good surface quality.

There are two kinds of spring steel, carbon spring steel and alloy spring steel, with 17 brands in total.
Main application: hot rolled spring steel wire rod is mainly used to produce spiral spring for various purposes.
Ball bearing steel hot rolled wire rod (yb9-68), ball bearing steel referred to as bearing steel, is used to manufacture all kinds of rolling bearing rings (shaft sleeves) and rolling elements (balls). Due to its special application, bearing steel is required to have high and uniform hardness, wear resistance, high elasticity and fatigue strength. It has enough toughness and hardenability, and has certain corrosion resistance in atmospheric environment or lubricant. Some special purpose rolling bearings also require high temperature resistance, corrosion resistance, non-magnetic, ultra-low temperature, high precision, long life and other performance. Therefore, the selection of bearing steel and steel quality requirements are more stringent than general steel.