Strong Steel Square Forging for Hot Rolling Mill Machinery Parts

Jiangsu Weirun Forging Co., Ltd.
Founded in 2001, Jiangsu Weirun Forging Co., Ltd. brings together the expertise of Jiangsu Longtai Alloy Technology Co., Ltd. and Jiangsu Xinya New Materials Co., Ltd. As pioneers in alloy steel smelting and forged product manufacturing, we have been at the forefront of innovation in China.
The company specializes in a comprehensive suite of operations, including alloy steel smelting, electroslag remelting, and precision forging, alongside mold manufacturing. Through years of dedicated expansion, we've developed a robust industrial chain that incorporates material recycling, advanced smelting techniques, electroslag casting, and precision machining, serving markets both domestically and globally.
Our expansive 60,000 square meter facility is equipped with cutting-edge technology: three 1-ton, one 3-ton, and one 10-ton electroslag furnaces; a fleet of air hammers; and fully mechanized electro-hydraulic hammer production lines. Complemented by state-of-the-art mechanical processing, heat treatment equipment, spectrometers, and testing devices, our fixed assets total an impressive 153 million yuan, driving an industrial output worth 300 million yuan. With a dedicated team of over 200, including 20 technical experts, we are a leader in Danyang City for both sales and tax revenue.
In our quest for excellence, we have aggressively sought out technical talent and formed strategic partnerships with leading universities and research institutions. Our dedication to innovation is evidenced by 5 national patents and 3 utility model patents, reflecting our commitment to technological advancement and industry leadership.
With an annual production capacity exceeding 30,000 tons of steel ingots and 15,000 tons of forgings, our products find applications across industries such as wind power, chemical engineering, machinery, automotive, shipbuilding, and more. We are driven by the ethos of 'pursuing excellence and building a world brand,' striving for global integration with a firm international brand strategy. Complying with ISO9001 and other prestigious certifications, Weirun is dedicated to delivering outstanding products and services, ensuring every customer experience is exceptional.

• What is the difference between forging and casting?

  Forging: It is the process of transforming a solid from one shape to another. Casting: It is the process of transforming a shapeless liquid metal into a solid with a shape. The so-called casting is the process of casting molten metal into a model to obtain a casting. The casting profession focuses on the metal melting process and the control of processes during the casting process. Forging is a plastic forming process in the solid state, which can be divided into hot processing and cold processing. Forgings include extrusion, drawing, roughening, punching, and so on. Casting is a solid liquid solid process, while forging is a solid to solid process where a solid can change its shape into another shape at high temperatures. There are still differences in the shape process and process of the two.

• How to choose high-quality forgings?

  In the quality inspection of forgings, there are mainly external observation methods and internal inspection methods. The appearance method, as the name suggests, is to observe the appearance of the product, such as the shape, geometric dimensions, surface condition, etc. of the forging, in order to understand whether it meets the standards and whether there are external defects. Specifically, it is to check whether the external dimensions of the forging meet the specifications and whether there are defects on the surface, such as cracks, wrinkles, bubbles, indentations, pits, impurities, scratches, etc. on the surface of the forging. Internal testing mainly involves analyzing the chemical composition, macroscopic and microscopic structures, and mechanical properties of forgings. This inspection process requires the use of specialized instruments for high magnification inspection, with the aim of checking for any phenomena such as fractures and shrinkage within the forging, as well as defects such as dendrites and white spots, disordered flow lines, and throughflow. It also includes the tensile strength, ductility, hardness, plasticity, and heat resistance temperature of the forging.

• What are the characteristics of the forging process for blank forgings?

  The forging process of circular forgings mainly consists of the following processes: pier roughening, elongation, punching, and expanding. The difference between free forging and ring rolling processes is mainly in the process of expanding holes. In the production of ring forgings, free forging is usually used to expand the hole with a horse screw, while ring rolling is mainly used to expand the hole with rolling.