Method for predicting influence of tempering on ultimate load of vanadium-added steel shell ring
A technology of ultimate load and vanadium-added steel, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems that cannot be used to guide lightweight design, inaccurate prediction results, and do not consider the evolution of material strength
Active Publication Date: 2021-09-10
ZHEJIANG UNIV
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[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a method for predicting the impact of tempering on the ultimate load of vanadium-added steel barrel joints, and to solve the problem caused by the existing method because the material strength evolution during the tempering heat treatment process of the barrel joints is not considered. Inaccurate prediction results and defects that cannot be used to guide lightweight design
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[0051] With reference to the accompanying drawings, figure 2 The example shown is the implementation object, according to the figure 1 Shown flow process, the present invention is described further.
[0052] figure 2 The example shown is a 2.25Cr-1Mo-0.25V steel plate-welded cylinder joint, its specific dimensions are: inner diameter 2400mm, outer diameter 2704mm, length 1700mm. The manufacturing process of the barrel joint is as follows: image 3 As shown, the details are as follows: First, the 2.25Cr-1Mo-0.25V steel plate needs to be preheated to 650°C; then, it is sent to the plate rolling machine, and the rolling is completed within a few minutes to obtain a semi-finished tube section; then , the semi-finished cylinder section was tempered at 705°C for 8 hours to obtain the finished cylinder section. It is worth noting that tempering heat treatment will reduce the strength of 2.25Cr-1Mo-0.25V steel, thereby weakening the ultimate bearing capacity of the barrel joint ...
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Abstract
The invention discloses a method for predicting the influence of tempering on the ultimate load of a vanadium-added steel shell ring. The method comprises the following steps: adopting pre-stretching and tempering to approximately replace a real manufacturing link of the vanadium-added steel shell ring, so that simulation of state evolution of materials in the shell ring in the real manufacturing process is realized; then implementing a high-temperature tensile test to obtain mechanical responses of the material in different simulation states; based on the test data, establishing a vanadium-added steel constitutive model considering the influence of manufacturing residues by using a data driving method; meanwhile, adopting finite element simulation shell ring forming to obtain residual plastic strain distribution in the shell ring is obtained; further, in combination with the constitutive model, acquiring the strength distribution evolution of the material in the shell ring in the manufacturing process; and finally, comparing the ultimate loads of the shell ring before and after tempering by utilizing a plastic ultimate analysis technology so as to predict the influence of tempering on the ultimate load of the vanadium-added steel shell ring. The method has the advantages of being high in feasibility, low in implementation cost, high in reliability and the like, and can provide a theoretical basis for lightweight design of the bearing part.
Description
technical field [0001] The invention relates to the field of ultimate load prediction of bearing parts, in particular to a method for predicting the influence of tempering on the ultimate load of vanadium-added steel cylinder joints. Background technique [0002] The ultimate load is one of the key indicators for evaluating the bearing capacity of a bearing. Lightweight is the main development trend of the current bearing parts. Accurately predicting the ultimate load has important guiding significance for the lightweight design of load bearing parts. For a certain material, the ultimate load of the bearing part mainly depends on the strength value and strength distribution of the material in service. It is worth noting that both are related to the manufacturing process of the carrier. Among them, the manufacturing process involves the forming link and the heat treatment link in turn. In general, the carrier is formed first and then heat treated to restore the toughness ...
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IPC IPC(8): G06F30/20G06F119/08G06F119/14
CPCG06F30/20G06F2119/08G06F2119/14
Inventor 陈志平李尤马赫缪好
Owner ZHEJIANG UNIV