Sampling method for penetration piece end socket quality inspection

Abstract

The invention relates to a sampling method for penetration piece end socket quality inspection. The penetration piece end socket comprises an end socket body and a penetration body, a sampling objectof the sampling method is a penetration piece end socket blank with allowance, sampling is carried out after heat treatment of the blank, and the sampling method comprises the following steps: (1) a first annular test piece is intercepted on the end socket body, and the intercepted first annular test piece is divided into a plurality of first test sample blocks; (2) a second annular test piece isintercepted from the penetrating body, and the intercepted second annular test piece is divided into a plurality of second sample blocks; the penetrating body and the end socket body are sampled; therefore, more complete and comprehensive quality analysis can be carried out on the whole penetration piece end socket; the overall quality of the mechanical penetration piece end socket of the main steam system is comprehensively inspected by analyzing the physical and chemical properties of the sample, the penetration piece end socket does not need to be completely damaged, and the penetration piece end socket can still be used as a product to be continuously used after sampling, so that the sampling cost is reduced to the maximum extent.

Description

technical field [0001] The invention relates to a sampling method for quality inspection of a penetrating piece head. Background technique [0002] As the concept of low-carbon environmental protection is becoming more and more popular, nuclear power, a clean energy source, has attracted more and more attention from all countries. my country has carried out localization of nuclear power equipment since the end of the last century, and the main equipment of the nuclear island of the second-generation nuclear power plant reactor has been fully localized. The main equipment of the third-generation nuclear power and Hualong No. 1 nuclear power unit with independent intellectual property rights Nationalization stage. With the improvement of the power of the new reactor type and the latest requirements of nuclear safety, the design of the important components of the nuclear island is also developing in the direction of large-scale and integrated, resulting in the design of some fo...

AI Technical Summary

Problems solved by technology

Heat treatment parameters are not easy to choose, and the production cycle is long

The specific manufacturing process is complicated, and the manufacturing difficulties include: adopting electric arc furnace rough smelting + ladle refining molten steel, it is a very complicated technical problem to minimize segregation of steel ingots, refine grains, and reduce inclusions; forging In the process, in the upsetting and elongating process, there is a ring-shaped step difficult to deform, and inclusion cracks are easy to occur

When the inclusion cracks gather together, they will often show excessive defects during ultrasonic testing; during the heat treatment process, due to the large difference in the wall thickness of the forging during the quenching process, the heat exchange of each part is inconsistent, which will affect the mechanical properties; the heat treatment process is prone to deformation , the thickness of the forging is uneven, it is not easy to harden, and the cooling rate is too fast, there will be a tendency to quench cracking; the overall quality of the forging is not easy to check, and it is difficult to sample from non-standard sampling parts; it is a special-shaped part, and it is difficult to perform machining and non-destructive testing.

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