Heavy-Duty 42CrMo Roll Shaft for Industrial Shaft Fabrication Needs

Jiangsu Weirun Forging Co., Ltd.
Founded in 2001, Jiangsu Weirun Forging Co., Ltd. represents the successful union of Jiangsu Longtai Alloy Technology Co., Ltd. and Jiangsu Xinya New Materials Co., Ltd. Embarking on a transformative journey into the competitive Chinese market, Weirun has emerged as a leader by mastering the art of alloy steel smelting and offering a versatile range of forged products. Since our establishment, our relentless drive for pioneering solutions and steadfast commitment to unparalleled quality have become the pillars of our renowned reputation.
Our esteemed company exemplifies quality excellence, engaging in a wide array of projects that include alloy steel smelting, electroslag remelting, forging, and mold design. We have meticulously developed a fully integrated industrial chain that harmoniously combines material recycling, smelting, electroslag casting, forging, and precision mold machining. Maintaining the highest quality standards, our commitment to excellence extends beyond borders, serving both domestic and international markets with distinction.
Our expansive manufacturing facility spans an impressive 60,000 square meters, equipped with cutting-edge technology: three state-of-the-art 1-ton electroslag furnaces, along with 3-ton and 10-ton units; two 2-ton, one 1-ton, and one 0.75-ton air hammers. Furthermore, we feature advanced 5-ton and 8-ton electro-hydraulic hammer production lines. Our facilities boast sophisticated mechanical processing and heat treatment equipment, cutting-edge spectrometers, and a comprehensive range of testing apparatus for both physical and chemical evaluations. With fixed assets amounting to 153 million yuan, and a remarkable industrial output value of 300 million yuan, we employ over 200 dedicated professionals, including 20 top-tier technical experts. Proudly, we are ranked among the top fifty enterprises in Danyang City for annual sales and tax contributions.
Propelled by our passion for innovation and growth, we have strategically recruited a diverse array of technical talents and established collaborations with leading domestic universities and research institutions. This forward-thinking approach has led to significant breakthroughs in technology and innovation, granting us 5 nationally authorized invention patents and 3 utility model patents, thereby cementing our status as an industry leader.
With an impressive annual production capacity exceeding 30,000 tons of steel ingots and a forging capacity of 15,000 tons, our products serve key roles across diverse industries such as wind power, chemical engineering, machinery, automotive, shipbuilding, power generation, metallurgy, mining, and petrochemicals. Embracing the ethos of 'pursuing excellence and building a world brand,' we align with the global market through a robust international brand strategy. Our commitment to international standards is evidenced by certifications like ISO9001, China CCS, France BV, and Germany TUV. As a dedicated provider of forged products, Weirun upholds the principles of professionalism, continually enhancing our expertise to deliver unmatched, high-quality services to our esteemed clients.

• 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.