Main items: metallographic inspection, chemical composition inspection, hardness test, phosphating film inspection, oil cooling curve, metrological inspection, forging temperature inspection, etc.

1.metallographic inspection

Metallographic Microscope There are two inverted metallographic microscopes as inspection equipment - Zeiss Axio Vert.A1 Inverted Metallographic Microscope (Germany): Magnification: 100×, 200×, 500×, 1000× Features: Equipped with dark-field illumination for enhanced contrast imaging. - Beijing Cewei Photoelectric LWD300LCS Inverted Metallographic Microscope (China): Applications: observe the microstructure and defect analysis of metal materials, forged, annealed, and heat-treated parts.

2. Chemical Composition Inspection

There are two spectrometers. One is direct reading spectrometer (British Alang ARYUS 8), which has higher accuracy in the spectral coverage range of 130nm - 700nm due to its higher resolution and efficiency, and is suitable for all kinds of metals. The other one is Handheld laser spectrometer ((British Alang CALIBUS 3B).

3. Hardness Test

There are 6 hardness testers. Three of them are Laizhou Huayin HR150A Rockwell hardness testers, which are suitable for detecting the surface and core hardness of bearing parts, with scales A, B, and C. Two of them are Laizhou Huayin HLN140 Brinell hardness testers, suitable for measuring the Brinell hardness of metals in the range of 8 - 650 HBW. And the last one is Shenyang Huayin HLN140 Leeb hardness tester, suitable for hardness testing of bearing parts and other parts.

4. Phosphating Film Thickness Test

There is a coating thickness gauge (MiniTest2500), which is suitable for measuring non-magnetic coatings, paint, enamel, rubber, aluminum, chromium, copper, zinc on steel (including steel alloys and hardened steel).

5. Oil Cooling Curve Inspection

The portable cooling medium performance detector can measure the cooling curves of quenching oil, water-based quenching oil, and nitrate salt solution.

6. Metrological Inspection

There are 487 bearing measuring instruments used in production; and 10 special bearing measuring instruments, all of which are well-known domestic and foreign brands:

·251810 movable bridge coordinate measuring machine with an accuracy of 3.3 + L/300;

·Digital display two-meter length measuring machine;

·One horizontal length measuring instrument from JENA, Germany, with a measuring range of OD 50mm - 400mm and ID 50mm - 250mm, used for measuring length; a J703 bearing ring angle measuring instrument (domestic brand) with a measuring range of 50mm - 250mm, used for measuring the angle of bearing rings;

·A portable roughness testers and a height gauges from Mitutoyo, Japan, are used for measuring contour roughness and height;

·A PR300 roundness measuring instrument (domestic brand), used for measuring roundness;

- There are more than 1,000 standard parts in total, including: inner raceway standard parts, outer raceway standard parts, tapered bore standard parts, OD standard parts, and ID standard parts.