ugg boots günstig Precision steel in different he

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Precision steel in different heat treatment state of the performance comparison

The tensile properties of heat treatment process results in Table 3 Table 4 Hardness (} {I) test results in Table 5 flattening, flaring test result number grades Die Beetle Triple Ka Note: 10 steel squash: constant: 0.09,[link widoczny dla zalogowanych], pressure flat height H: 31.4m, flaring: 60 ~ diameter ≥ 22% 20 steel squash: Constant C: 0.09, squash height H: 24.6m, flaring: 60 ~ diameter ≥ 22% Table 6 gold phases in test results that: F is ferrite, P pearlite sheet for the sheet. P granules to granular pearlite 3.1 Results of tensile properties of 3 from Figure 1, Figure 2,[link widoczny dla zalogowanych], Figure 3 shows that, with the cold / hard state, compared to the stress of the steel in the annealed state, the strength decreases slightly However, marginally, while the elongation rate increased more. Not fully annealed and fully annealed and cold / hard state compared to steel strength decreased and elongation increased significantly, but not fully annealed and fully annealed difference between not obvious. Normalizing a slight increase in strength than the annealed condition, the elongation rate changed little. Management standards and GB/T3639-2OOO precision mechanical performance (see Table 7) compared can be drawn, all the experimental conditions than the standard high, especially elongation, much higher than the standard value. Table 7GB/T3639-2OOO mechanical properties of the standard grades of delivery status was once Fort! Ji obstruct investigation was falling 璺 look chalky M cricket by 10410637551O33512335243352052420510545o8430103902041024520355904550652o85101753o315174564546305610759D14600355I4 Treatment Technology and Equipment section 3.2 of the hardness the same volume of steel to stress annealing in the hardness and the cold / hard state compared to no significant decrease, because the annealing temperature to stress ideological than 1,000,800,600 00 4 Yu flap plus 50%% 30%. m-20% lO% O% cold / hard to stress annealing is not fully annealed Ring of Fire full annealing curve of circle l 3, the yield strength elongation curve can be seen from Figure 4, in the cold / Hard and annealed to the stress state, the hardness of the steel is close between, all in HRB90-100 between the annealing or normalizing, the hardness were quite different. annealed steel hardness decreased significantly, low carbon steel (10 , 20) HRB ≤ 70, medium carbon steel (35,45) HRB70-80 only between the lowest hardness is not fully annealed state. This is due to organizational changes occurred steel results differences. For 10 and 20 steel, the use of normalizing, due to rapid cooling rate,[link widoczny dla zalogowanych], an increase of dispersion and pseudo pearlite eutectoid volume,[link widoczny dla zalogowanych], while reducing the free ferrite, the hardness increased. 3.3 Flattening the performance of this test is only expanding 10,20 for the flattening of steel flaring test, from test results, the cold / hard state, and to stress annealing, the two properties are substandard, and even with annealing can not completely meet requirements of the plastic deformation of steel 3. .4 metallurgical test results from the microstructure can be seen in Table 6. do not fully annealed ferrite organizations granular pearlite, while the full annealing and normalizing organizations ferrite and lamellar pearlite, flaky pearlite as large as the lower hardness does not exceed the Al point, just to eliminate the residual stress generated during cold for the purpose of changing the metal, and no organization, so the hardness did not change significantly. 90o8007o06005o04003o0l10. ∞ 100. Shoes 50. cold / hard to stress not completely full annealing annealing annealing curves of tensile strength is Ring of Fire 2 ring 4 in the granular hardness light curve of the body, so the state does not fully annealed hardness and strength of the lowest. On the other hand, normalizing the state more fully and because of organizational changes faster cooling rate, banded structure has been basically eliminated, the grain size is also smaller, a corresponding increase in the strength and hardness of steel. 4 Conclusions 1) The delivery status of the mechanical properties of several different, but not fully annealed, fully annealing and normalizing changed little between the three. such as elongation strength and hardness can be used to require higher stress annealing. The process temperature was 610 ± 10cc. 2) can be cold drawn precision tubes are not fully annealed fast annealing cooling process, can reduce the heating temperature, increase productivity and surface quality of steel; normalizing the state may refer to the state by annealing or normalizing annealing Process. References [1] Lixin Chun. Deformation of the performance of cold drawn precision tubes. Steel .0 eat (1): twelve l5. [2] Wang Jianan. Metallurgy and Heat Treatment. Machinery Industry Press .19 t90,[link widoczny dla zalogowanych], 41 a, 16 .- carpet woolen rug blanket box

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ugg boots g&#252;nstig Precision steel in different he

ugg boots günstig Precision steel in different he