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Failure fracture reason and material analysis of connecting link
Source: www.sdaid. com Update time: 21 / 08 / 26 09:20:08 close Share:

Connecting link There are a variety of materials, among which yes The fracture failure of 30crmnti steel link in service was studied. In order to find out the cause of fracture, the composition, microstructure and hardness of the samples were analyzed by direct reading spectrometer, optical microscope, scanning electron microscope and microhardness tester.

 

The results show that The microstructure of the sample after heat treatment is tempered troostite and ferrite, which may be due to the low heating temperature and incomplete austenization, which leads to the retained ferrite structure and reduces the maximum load capacity of the parts. Some ferrite structures are needle like distributed at the grain boundary, which is easy to produce stress concentration and cause cracking.

 

Used by Shandong aide 23MnNiMoCr54 high quality alloy steel has better performance and application effect 30CrMnTi, In particular, aide's large-scale connecting links, such as vertical connecting rings (vertical rings) and clamping block flat connecting rings (flat rings), have passed the national safety standard certification, with high strength and wear resistance, and large load bearing capacity, which are favored by coal mining enterprises. A long-term cooperation agreement has been reached. It is suggested that the majority of dealers and coal enterprises purchase aide 54 steel link.


 Connecting link flat ring material

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