Alloy Steel Castings

Dandong Dawang Steel Castings Co., Ltd. can produce different types of alloy steel castings. Because the alloy steel contains different types and quantities of alloying elements, and adopts appropriate technological measures, they can respectively have higher strength, toughness, hardenability, and with special properties such as wear resistance, corrosion resistance, low temperature resistance, heat resistance, thermal strength, red hardness, etc., it is widely used in the manufacture of steel structures such as bridges, ships, vehicles, boilers, pressure vessels, and cranes.

the technology

Alloy Steel investment casting Process

Each process of our production is executed in strict accordance with the Standard Operation Procedure (SOP). The main process is as the following: Pouring simulation, Mold development, Raw material inspection, Wax pattern, Shell preparation, Metal pouring, Cleaning and Heat treatment, Inspection, Warehouse packaging, and Shipping.

Mold Development

The technical department develops the mold, and the quality department uses the three coordinates to carry out the dimensional inspection.

Wax Pattern

The workshop uses automatic waxing machines to set the waxing pressure, holding time, etc. and to produce high quality was patterns.

Shell Preparation

The workshop has 4 automatic production lines, able to produce 1800 sets of shells. We use hygrothermograph, aerometer, and PH to monitor humidity, temperature, and concentration of liquor aluminum chloride.

Metal Pouring

4 sets of 500KG furnaces are in production, and 3 sets of 500KG spare furnaces are ready when capacity increases. The operators conduct rigorous tests to fulfill material requirements.

Clean and Heat Treat

The workshop is fully equipped with 8 heat treatment furnaces, 3 quenching furnaces, 1 central shot blasting machine and 11 large shot blasting machines.

Inspection

All blank dimensions are checked using a CMM. We have rockwell hardness machine, dynamic balance instrument, roundness meter, etc. The company's quality department has certified employees to do UT, PT, MT testing.

the technology

Alloy Steel sand casting Process

Each process of our production is executed in strict accordance with the Standard Operation Procedure (SOP). The main process is as the following: Pouring simulation, Mold development, Raw material inspection, Modeling (Core-Making), Melting, Metal pouring, Cleaning and Heat treatment, Inspection, Warehouse packaging, and Shipping.

Mold Development

Design and produce molds according to the requirements of the drawings. Generally, wood molds can be used for single-piece production, plastic molds and metal molds are made for mass production, and templates can be made for mass castings. Our mold is mainly made of aluminum.

Modeling (core-making)

Includes modeling (forming the cavity of the casting with molding sand), core-making (forming the inner shape of the casting), and mold matching (putting the core into the cavity and closing the upper and lower flasks). Modeling is a key process in casting.

Melting

According to the required metal composition, the chemical composition is matched, and the appropriate melting furnace is selected to melt the alloy material to form a qualified liquid metal liquid (including qualified composition and qualified temperature)

Metal Pouring

Pour qualified molten metal into the sand box equipped with the mold. The pouring stage has high safety requirement, and we have rigorous process control to protect the safety of our employees.

Clean and Heat Treat

After the molten metal is poured and solidified, the molding sand is removed, and the gate and other attachments are knocked out to form the required casting.

Inspection

All blank dimensions are checked using a CMM. We have rockwell hardness machine, dynamic balance instrument, roundness meter, etc. The company's quality department has certified employees to do UT, PT, MT testing.

Questions about alloy steel casting service

Low-alloy steel refers to alloy steel with a total amount of alloying elements less than 5%. Low-alloy steel has been widely used in the manufacture of construction machinery, ships, bridges, high-rise buildings, boilers and pressure vessels, electric power, and various vehicles. High-alloy steel refers to alloy steel with more than 10% alloying elements in the steel. High-alloy steel includes high-quality alloy steel and special alloy steel; according to characteristics and uses, it is divided into alloy structural steel, stainless steel, acid-resistant steel, wear-resistant steel, heat-resistant steel, alloy tool steel, rolling bearing steel, alloy spring steel and special performance steel.

Chromium, molybdenum, vanadium, manganese, nickel

Low alloy steels have less than 8% total alloying elements in the composition, these steels have better hardness and resistance to wear over carbon steel but tend to have less tensile strength. The high alloy steels have more than 8% alloying elements and have better properties than those of the low alloying steels.

1: High strength, good plasticity and toughness. Due to the effect of alloying elements, its strength is 25%-50% higher than ordinary carbon steel, its elongation is 15%–23%, and its impact toughness at room temperature is higher than 60J/cm^2.
2: Good weldability. Because of the low carbon content and low alloying element content, its plasticity is good, and the hardenability is low, it is not suitable for quenched structure or cracks to appear at the weld.
3: Good cold and hot pressure processing performance. Due to its good plasticity and low deformation resistance, it is not easy to produce cracks after pressure processing.
4: Good corrosion resistance. It has higher corrosion resistance than carbon steel under various atmospheric conditions.

Steel Casting Services

Get Quote

Please prove you are human by selecting the Tree.