BAIJIAN - Third party testing organization
Carburized bearing steel is a support for various mechanical components、 and its working environment may be ultra-high temperature、 ultra-low temperature、 strong (slightly) vacuum、 or strong impact、 high wear、 and ultra-high speed. The structural characteristics and working conditions of carburized bearing steel require that bearing parts must have high hardness、 wear resistance、 contact fatigue strength、 good toughness、 dimensional stability、 corrosion resistance、 and cold and hot working performance. The hardness of rings and rolling elements made of carburized bearing steel is HRc60~64、 which is generally suitable for working temperatures ranging from -40~140 degrees Celsius. Oil and grease lubrication is normal and can be used under large impact and vibration conditions、 such as bearings for locomotives、 rolling stocks、 and steel mills. However、 the heat treatment process of this steel type is relatively complex. By using 910 ℃ quenching and 180 ℃ secondary tempering、 the material properties of bearing steel can reach hardness HRC 45.2、 tensile strength Rm is 1450MPa、 yield strength ReL is 1240MPa、 AKU is 105J、 and the volume fraction of residual austenite is controlled below 1%. The good combination of strength and toughness of the test steel mainly comes from grain refinement、 ultrafine martensite Flat noodles and precipitation of uniformly dispersed fine carbide; The main effect of dimensional stability is to control the amount of residual austenite
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific、 fair、 and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsinspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered、 meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing、 with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle、 low cost、 and attentive service 7. Possess authoritative qualifications such as CMA、 CNAS、 CAL、 etc 8. The testing report is authoritative and effective、 and is generally used in China