Zhejiang Qibin Steel Pipe Technology Co., Ltd. Takes You Through Spiral Steel Pipes
Structural steel pipes include hot-rolled seamless steel pipes and welded steel ...
Read More1. Extremely High Cleanliness
This is the core feature that distinguishes bearing steel from all other steel pipes.
Impurity Control: Strict limits are placed on the content of oxygen, sulfur, and phosphorus, as well as non-metallic inclusions (oxides, sulfides). These microscopic impurities are the primary source of fatigue spalling.
Homogeneity: The carbide structure must be distributed extremely uniformly. Large network carbides must be avoided to ensure consistent mechanical properties throughout the component.
2. Exceptional Wear Resistance and Hardness
Bearings are subjected to intense Hertzian contact stress during operation.
High Carbon Content: Typically contains carbon levels between and (e.g., the famous GCr15 / SAE 52100), ensuring high hardness after quenching.
Working Hardness: After heat treatment, the hardness typically reaches HRC 60–65, providing effective resistance against wear caused by long-term friction.
3. High Contact Fatigue Strength
Bearings undergo hundreds of millions of stress cycles during rotation. The pipe must possess incredible fatigue resistance to prevent premature surface pitting or spalling, thereby extending the service life of the bearing.
4. Superior Dimensional Precision and Surface Quality
Minimized Machining Allowance: These pipes are usually produced via cold-rolling or cold-drawing. The tight tolerances for outer diameter and wall thickness allow for direct processing on automated CNC lathes, significantly reducing material waste and machining time.
Zero Tolerance for Surface Defects: The inner and outer walls of the pipe must be free of cracks, folds, or severe pitting.
information to be updated
Zhejiang Qibin Steel Pipe Technology Co., Ltd. is located at No. 8 Fengshan Road, Longyou Industrial Park, Mohuan Township, Longyou County. The company was established on March 21, 2022, as a partnership between Xu Mingqi and Wang Dongping, engaged in the rolling, processing, and sales of seamless steel pipes. The legal representative is Wang Dongping. The company currently covers an area of 16,573 square meters, with a building area of 10,021.06 square meters and over 20 million RMB in fixed assets. It operates 21 cold rolling production lines equipped with supporting wastewater treatment facilities and employs 30 staff members. As a private economic entity integrating production, sales, and logistics, its products are used in the processing of electric tools, automotive and motorcycle parts, and mechanical components. The company sells its products to provinces and cities such as Sichuan and Jiangsu, as well as surrounding areas within the province, earning strong trust from customers and a high reputation in the market. In the 2023 fiscal year, the company achieved an output value of 30 million RMB. While continuously improving its production and operational efficiency, the company has also made notable progress in various management areas. Guided by the principles of "Quality First, Service First, Integrity First," and driven by the business strategies of "Fair Pricing, Customer Foremost, Thoughtful Service, Giving Benefits to Customers, and Small Margins but High Volume," the company is committed to continuous technological innovation to provide customers with more advanced and environmentally friendly seamless steel pipes.
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