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Stainless steel processing refers to the process of cutting, folding, bending, welding and other mechanical processing of stainless steel coils based on the properties of stainless steel to finally obtain stainless steel products needed for industrial production. In the process of stainless steel processing, a large number of machine tools, instruments and stainless steel processing equipment are needed. Stainless steel processing equipment is classified into shearing equipment and surface treatment equipment, and shearing equipment is divided into leveling equipment and slitting equipment.

Kaiping equipment cuts the steel coil into a flat plate with appropriate size. It can be non-standard plates with different lengths, and the indexes to measure the processing quality are mainly length tolerance and diagonal tolerance, as well as the quality of cutting.

Stainless steel processing refers to the process of cutting, folding, bending, welding and other mechanical processing of stainless steel coils based on the properties of stainless steel to finally obtain stainless steel products needed for industrial production. In the process of stainless steel processing, a large number of machine tools, instruments and stainless steel processing equipment are needed. Stainless steel processing equipment is classified into shearing equipment and surface treatment equipment, and shearing equipment is divided into leveling equipment and slitting equipment.

Stripping is the processing method of cutting steel coil into smaller width steel coil. For slitting equipment, the first item to measure its processing quality is dimensional accuracy, especially for small width slitting, which requires very high requirements for width, sickle bending and other items. In addition, there are also very strict requirements for the burr at the incision.

Perforation processing technology in seamless pipe production is the core link. Its core is to realize the hollowing of the pipe blank through high temperature and high pressure. After the solid round billet is heated to about 1200℃ and reaches the plastic state, a hole is punched in the center of the billet through the cooperation of the piercer plug and the roller, forming a preliminary hollow pipe. The capillary tube is extended by the continuous rolling mill, and the wall thickness and sizing are controlled to form a hollow pipe close to the finished product. After cooling, it is straightened, cut and subjected to size inspection and surface treatment.

Alloy is an alloy material based on nickel and added with other metal elements. Because of its excellent corrosion resistance, high temperature resistance, high strength and good processability.

1. Basic element: nickel (Ni)
Nickel is the basic element in nickel alloy, and its content is generally above 50%. Nickel has good corrosion resistance, high temperature resistance and good mechanical properties.

2. Alloy elements
(1) Chromium (Cr): Chromium is an important alloying element in nickel alloy, which can improve the corrosion resistance and high temperature resistance of the alloy.
(2) Molybdenum: Molybdenum can enhance the strength and hardness of nickel alloy and improve its wear resistance.
(3) Copper (Cu): Copper can improve the corrosion resistance and high temperature resistance of nickel alloy, while reducing the density of the alloy.
(4) Titanium (Ti): Titanium can improve the corrosion resistance, high temperature resistance and oxidation resistance of nickel alloy.
(5) Aluminum (Al): Aluminum can reduce the density of nickel alloy and improve its strength and corrosion resistance.
(6) Silicon (Si): Silicon can improve the corrosion resistance and high temperature resistance of nickel alloy, and at the same time improve its processability.
(7) Manganese (Mn): Manganese can improve the corrosion resistance and high temperature resistance of nickel alloy and reduce its cost.

3. Non-metallic elements
(1) Carbon (C): Carbon can improve the corrosion resistance and high temperature resistance of nickel alloy and reduce its cost.
(2) Boron (B): Boron can improve the strength and corrosion resistance of nickel alloy and reduce its density.

Stainless steel solid core welding wire can be used for inert gas shielded welding (TIG, MIG welding). It can also be used for submerged arc welding. MIG welding of stainless steel can not only achieve efficient welding, but also easily realize welding automation. It is widely used in the fields of surfacing and thin plate welding, which makes the weld bead ripple beautiful and is not easy to produce incomplete welding, slag inclusion, air holes and other defects.

Like carbon steel and low alloy steel flux-cored wires, stainless steel flux-cored wires can weld stainless steel simply and efficiently. MAG welding is the main application of stainless steel flux-cored wires, which has good slag removal and shiny weld surface. Little splash, excellent arc stability.

The production process of bar mainly includes raw material preparation, smelting, rolling, straightening, cutting and surface treatment.

Hot rolled bar (Hei Bang): smelting → continuous casting → hot rolling → pickling → finishing → delivery.
The surface is acid-washed white gray, which is the largest commodity-grade bar.

Forging bar: smelting → die casting/electroslag → forging → heat treatment → rough machining → leaving the factory.
Usually used in areas with higher performance requirements.

Bright bar (silver bright bar): using hot rolled or forged bar as base material → peeling/cold drawing/polishing → fine polishing.
The surface is smooth as a mirror, with high dimensional accuracy, and can be directly used for precision machining.

Cold-drawn bar: hot-rolled pickling bar → cold drawing (drawing deformation through die) → heat treatment → straightening.
High dimensional accuracy, smooth surface and improved strength, which are often used to manufacture shaft parts.