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Recently, Wang Shengtang, secretary-general of China Gear Professional Association, pointed out at an automotive gear industry development strategy seminar: “At present, there is still a big gap between China and the automotive gear industry in terms of product quality.†China Gear and Gear Steel Quality Monitoring Vice Chairman of the Trade Collaboration Network, China's authoritative expert in the gear steel industry, and Chang Shuguang, head of the coordination and coordinating team for the Gear Steel Technical Research Department of the former Ministry of Metallurgy, told the reporter about the underlying reasons. In recent years, some automotive gear steel companies have continuously raised the price of automotive gear steel. Since 2003, the price of gear steel in the Chinese market has increased by more than 60%. At the same time, vehicle companies continue to push down the prices of gears and other components, and the average annual pressure is lowered by more than 10%. Because of the “pressing on the crowdâ€, the days of Chinese automotive gear industry companies are getting sadder and harder. In contrast, SMEs are even more sad than the days of big companies. Among them, some companies are even close to failure. Some automotive gear companies, especially small and medium-sized automobile gear enterprises, have to use low-cost, low-quality steel to reduce costs and satisfy their most primitive desire for survival. In the total output of China's automotive gear industry, the output of small and medium-sized enterprises accounts for more than 70%. Therefore, the proportion of low-priced and low-quality steel used in the Chinese automotive gear industry is very large. In accordance with international practice, automotive gear steel is divided into A, B, C three categories. Corresponding to this, there are great differences in quality between different types of automotive gears: the fatigue life of the bench test of Class C steel automotive gears is 300,000, and the fatigue life of bench test of Class B steel automotive gears is 1.1 million. Between 1.9 million times, the fatigue life of the bench test of A-type steel automotive gears is higher than that of B-grade steel automotive gears. Chang Shuguang said: "At present, developed countries produce automotive gear, the commonly used steel is B-type steel, and some use A-type steel; in China's automotive gear industry, 75% of the steel used in heavy-duty automotive gear is C-class steel Only 25% of the medium and heavy-duty automobile gears are made of Class B. China's small and medium-sized enterprises in the automotive gear industry generally use Class C steel, which is the fundamental reason for the low quality of China's auto gears, and is also a bottleneck for China’s construction of a powerful automotive gear industry. If you do not break through this bottleneck, you will not be able to build a strong automotive gear industry." Yao Futai [Related Links] China's steel industry, the implementation of centralized bidding and procurement methods for steel joints Currently, China's large-scale enterprise group procurement of steel using centralized tender pricing, subordinate companies and steel mills The method of signing a contract is similar to the standards adopted by foreign companies, and has strict requirements for hardenability and oxygen content. Gear parts have high precision, high life expectancy, low repair rate, and low purchase cost; and SMEs purchase steel materials. Mostly a single purchase from a middleman, the standard used is not the hardenability and oxygen content Seeking the GB3077, GB5216 national basic standards. Therefore, Chinese SMEs have high procurement costs for steel products, low quality gear products and high revision rates. In order to improve the competitiveness of SMEs and improve the overall quality level of products in the gear industry, China's gear and gear steel quality control trade collaboration network must standardize the SMEs' steel production and construction behavior, implement steel procurement standards for the gear industry, and implement a joint centralized bidding and procurement. 1. Standards for steel procurement: Implementation of the "Technical Requirements for Steel for Gears for Vehicles" promulgated by China Gear Professional Association and the Gear Machining Committee of the China Automotive Engineering Society. The "Technical Agreement" with special requirements shall meet the requirements of the "Market Access Requirements for Steel Gears for Vehicles". 2. Selection of steel mills: Steel mills supplying steel products should be certified by the China Gear and Gear Steel Quality Monitoring Trade Collaboration Network. 3. China Gear & Gear Steel Quality Monitoring Trade Collaboration Network The Standing Committee Secretariat is the organizational unit for enterprises to jointly bid for steel products and is responsible for the organization and coordination of joint bidding and procurement. 4. Operation procedures for implementation of joint bidding and procurement: (1) The gear factory shall submit the steel grades, specifications, quantities, standards, etc. for steel products to be tendered for procurement to the secretariat of the Standing Committee of China Gear & Gear Steel Quality Monitoring and Trade Collaboration Network. (2) China's Gear and Gear Steel Quality Monitoring Trade Collaboration Network, after summarizing the bidding materials of each gear plant, implements the bidding; determines the steel products price and supply of the steel mills, and reports the overall procurement plan to the steel mills, which will enter the total deposits. Steel account number. (3) The China Gear and Gear Steel Quality Monitoring Trade Cooperation Network issued a certificate for the steel plant procurement price, specification, quantity, and amount of prepayment; the gear factory received a certification after paying a management fee of RMB 10 per ton. A certificate of cooperation with the steel plant signed a supply contract. (4) The gear factory may entrust the middlemen to purchase, but it is necessary to issue an agent certificate for the middlemen. China's steel industry general rules for steel procurement regulate the gear steel market, monitor the quality of gear steel, and promote product quality in the gear industry as soon as possible in line with international markets. China Gear Professional Association, China Association of Automotive Engineers Gear Processing Committee, National Gear Product Quality Supervision and Inspection Center and China The following general rules are issued jointly by the Steel and Gear Steel Quality Monitoring and Trade Collaboration Network: 1. Basic Requirements for Steel Purchase: 1. The standards for steel products in gear plants must meet the market access conditions for steel for gears for vehicles. 2. The steel supplier selected by the gear factory must undergo quality certification and obtain a certificate to enter the supplier list. Second, the procurement of steel: 1. Gear factory can bid separately for the procurement of steel, steel can also be jointly bidding for procurement. 2. The Standing Committee of China's Gear & Gear Steel Quality Surveillance Trade Collaboration Network is the organizing unit for the joint bid invitation of gear companies to purchase steel products. It is responsible for the organization and coordination of joint bid procurement. 3. In May and November of each year, the China Gear and Gear Steel Quality Monitoring Trade Cooperation Network organizes two joint bids to purchase the steel exchange meeting. The gear factory that participates in the joint bidding and procurement, one month in advance, submits steel grades, standards, specifications, quantities, and delivery dates to the secretariat of the China Gear and Gear Steel Quality Monitoring Trade Collaboration Network by mail, fax or e-mail. The secretariat of China Gear & Gear Steel Quality Monitoring and Trade Collaboration Network categorizes the reported items and publishes them on the Gear Business Network. The tendering of steel products is carried out according to categories (blocks). The winning steel supplier contracts with the various gear factories. Third, supervision and inspection: 1. A separate bid for the procurement of steel gear factory, should ask the network to send observers to observe the procurement. 2. The National Gear Product Quality Supervision and Inspection Center must take the quality of steel as one of the items that must be checked when conducting supervision and spot checks on various gear factories. Purchasing activities are inconsistent with the two basic requirements for steel procurement, and the quality of gear sampling is considered unqualified. Market access conditions for steel gears for vehicles After China's accession to the World Trade Organization, the steel standards for gears for vehicles in China must comply with international standards. Therefore, China's gear and gear steel quality monitoring and trade cooperation network proposes market access conditions for vehicle gear steels as follows: 1. Terminal hardenability: Hardenability bandwidth (upper limit minus lower limit) cannot exceed 7HRC 2. Oxygen content ≤ 0.0020% ( 20ppm ) 3. Non-metallic inclusions: Class A Fine ≤ 2.5 Thick ≤ 2.5 Small Class B Fine ≤ 2.5 Thick ≤ 2.5 Small Class C Fine ≤ 2.0 Thick ≤ 2.0 Small Class D ≤ Grade 2.5 coarse ≤ 2.5 4. Grain size: Austenite grain size finer than equal to 5 5. Surface quality: in line with GB/T3077-1999 "alloy structural steel" provisions 6. Size: in line with GB/T702 - 1986 "Dimensions, Shapes, Weights and Permissible Deviations of Hot Rolled and Square Steels". Explanation: All those who meet the above-mentioned gear steel procurement standards (technical conditions), China Gear and Gear Steel Quality Monitoring Trade Collaboration Network are recognized. The special requirements of the user are negotiated between the supplier and the buyer in the contract. This site was taken from China Automotive News