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Predictable productivity. Reduced risk. Why not rely on one trusted partner for your steel products and complete processing services?
At QILU, we offer comprehensive steel processing services to meet the unique needs of our clients. Our processing capabilities include cutting, drilling, punching and bending of steel materials. Whether you need custom steel parts for your manufacturing needs or require highly specialized processing services, our team has the expertise and experience to get the job done. We work closely with our clients to understand their specific needs and provide tailored solutions that meet their requirements.
Customer Service Email：info@qilu-toolsteel.com
Steel Processing Services
At QILU, we offer comprehensive steel processing services to meet the unique needs of our clients. Our processing capabilities include cutting, drilling, punching and bending of steel materials.
Whether you need custom steel parts for your manufacturing needs or require highly specialized processing services, our team has the expertise and experience to get the job done. We work closely with our clients to understand their specific needs and provide tailored solutions that meet their requirements.
Face Milling and Side Milling
Our company can supply follows materials in face milling and side mill processes:
Boring Drilling
Our company can provide Boring Drilling services for the following materials:
Size Range
Width: 3000mm Max
Height: 1000mm Max
Dimension Tolerance
-0/+3mm Max
Size Range
Inner Diameter：25mm-350mm
Length: 10000mm Max
Wall Thickness :≥100mm
Dimension Tolerance
-3/+0mm Max
Rough Turning
Our company can provide Rough Turning services for the following materials:
Centerless Peeling
Our company can provide Centerless Peeling services for the following materials:
Size Range
Diamater: 80mm-1200mm
Length: 10000mm
Dimension Tolerance
-0/+3mm Max
Size Range
Diamater: 25mm-300mm
Length: 3000mm Min
Dimension Tolerance
-0/+1.5mm
Upset Forging
Upset forging increases the diameter of the workpiece by compressing its length.
Based on number of pieces produced, this is the most widely used forging process. A few examples of common parts produced using the upset forging process are engine valves, couplings, bolts, screws, and other fasteners.
Features：The dies open enough to allow the workpiece to move from one cavity to the next; the dies then close and the heading tool, or ram, then moves longitudinally against the bar, upsetting it into the cavity. If all of the cavities are utilized on every cycle, then a finished part will be produced with every cycle, which makes this process advantageous for mass production.
How it works
Upset forging is usually done in special high speed machines called crank presses, but upsetting can also be done in a vertical crank press or a hydraulic press. The machines are usually set up to work in the horizontal plane, to facilitate the quick exchange of workpieces from one station to the next. The initial workpiece is usually wire or rod, but some machines can accept bars up to 25 cm (9.8 in) in diameter and a capacity of over 1000 tons. The standard upsetting machine employs split dies that contain multiple cavities.
These rules must be followed when designing parts to be upset forged:
- The length of unsupported metal that can be upset in one blow without injurious buckling should be limited to three times the diameter of the bar.
- Lengths of stock greater than three times the diameter may be upset successfully, provided that the diameter of the upset is not more than 1.5 times the diameter of the stock.
- In an upset requiring stock length greater than three times the diameter of the stock, and where the diameter of the cavity is not more than 1.5 times the diameter of the stock, the length of unsupported metal beyond the face of the die must not exceed the diameter of the bar.
Heat Treatment
We can satisfy the customers’ further use of the products by heat treatment,We can supply following heat treatment services: Normalizing, Annealing, Quenching, Tempering, Carburizing, Nitriding, High-frequency surface hardening and other processing services.
Normalizing
Normalizing is a heat treatment process for making material harder and refining the grain size .
A material can be normalized by heating it to a specific temperature and then letting the material cool to room temperature outside of the oven. This treatment refines the grain size and improves the uniformity of microstructure and properties of steel.
Annealing
Annealing is a heat treatment process used to improve the properties of metals and alloys, especially their ductility and toughness. The process involves heating the material to a specific temperature, holding it at that temperature for a set period of time, and then cooling it slowly in order to achieve a desired microstructure and mechanical properties.
During annealing, the internal structure of the material is changed by changes in its crystal lattice. Annealing can reduce the internal stresses of the material and increase its ductility and toughness, making it more suitable for deformation processes.
Annealing refers to a heat treatment process for metal materials. Common forms of annealing include:
Full Annealing: The material is heated to a sufficiently high temperature and then cooled slowly. It can improve the material’s toughness and machinability.
Normalizing Annealing: Similar to full annealing, but the material is allowed to cool naturally to below room temperature before being quenched. This is often used for heavy steel parts to increase their strength and hardness.
Spheroidizing Annealing: The material is heated close to its critical temperature and then allowed to cool slowly. It can make carbon evenly distributed and form smooth geometric shapes, thereby improving its processing performance.
Aging Annealing: The material is heated to a specific temperature and held at that temperature for a period of time to allow alloying elements in its solid solution to precipitate, thereby changing its physical and mechanical properties.
Stress-Relief Annealing: The material is heated to an appropriate temperature and then cooled slowly to eliminate any stress or defects in the material. It can improve the material’s machinability and corrosion resistance.
These forms of annealing can be chosen based on different types of metals and specific application scenarios to achieve the best results.
Quenching and tempering
During the quenching stage of QT, the material is heated to a specific temperature and then rapidly cooled by immersion in a quenching medium such as water or oil. This quenching process causes the material to become very hard and brittle.
Next, the material undergoes tempering, which involves reheating it to a lower temperature and holding it there for a specified amount of time. The purpose of tempering is to reduce the brittleness caused by the quenching process, while maintaining some of the hardness and strength gained during the first stage of heat treatment.
The duration and temperature of both stages of the QT process are carefully controlled to achieve the desired material properties. QT can improve the material’s yield strength, tensile strength, toughness, and resistance to impact and fatigue.
