www.melanexjou.fora.pl

[loiwtjsf]

High-frequency welding hardened steel surface area superplastic welding


Obviously a lot of steel temperature transformation superplasticity. 40Cr and carbon steel,[link widoczny dla zalogowanych], low alloy steel Ac is not very different (see Table 1), so in the above temperature range, the two sides revealed better crimp the ability of superplastic deformation of steel with such so-40Cr crimping temperature superplastic The two sides may be the best super-plastic temperature any temperature, but in general should take the higher of which, this time low superplastic flow stress and the diffusion faster and the joint strength increased slightly (Fig. 3a) tests showed that higher temperature crimping. Decrease the effect instead,[link widoczny dla zalogowanych], which is obviously different from conventional pressure welding deformation. This is because, although higher temperatures can further accelerate the atomic diffusion, but the grain growth is inhibited while filling crimp superplastic flow temperature is too low. The atomic diffusion and superplastic flow is immune, \Resulting in lower joint strength can not even welding. A 0l54068O720769899Tf ℃) (a) crimping temperature (; 0 = 1.5Xlo: min ~. F a 5min) 62056. 540 3 bad crimp joints before the tensile strength of samples of tissue samples for the organization of state crimping conditions desolate location of the first two specimens were fracture strength of the supply state of T = 750 ℃ 38O welding Zha two sample ports are Tan Lian Jie unitary quality of the sample A strong treatment process are broadcast t15 × 10 850 for a jn a material (40Cr unitary sample Process B Ru are broadcast of \If an organization meets the requirements of superplasticity, the joint strength can approach or reach the base metal strength,[link widoczny dla zalogowanych], which means that in practice the two sides to be welded to reduce one of the organizational requirements. 4 connector mechanism on the part of the test first After superplastic crimping 40Cr-T10 samples were joint area and diffusion coefficient of component analysis calculations (another paper), the results indicate. cr atoms in the process of superplastic crimping 40Cr side from the obvious to the side of the proliferation of T10 , diffusion layer depth 60prn, while at the same temperature, 40Cr-T10 samples up to 10h after the insulation, the diffusion layer depth Jin 60m. Further calculations show that the process of superplastic deformation in the diffusion coefficient in steel than conventional diffusion coefficient increased by 2 to 3 orders of magnitude. steel surfaces to be connected refining the high-frequency hardening,[link widoczny dla zalogowanych], the prestressing effect of the two contact surfaces in close contact and crimp heating to the superplastic temperature, the surface of fine-grained metastable region particles into stable equiaxed fine grain, in the superplastic strain rate within the crimping, the regional priorities to meet the organizational conditions required for superplastic deformation and deformation conditions, the deformation is superplastic deformation occurs in the low large plastic flow stress, can fully guarantee the contact surface on both sides of the metal in the short period of time in close contact and binding; the superplastic deformation process of rapid diffusion of atoms to vote and help spread the disappearance of the interface hole depth increases, the formation of solid metallurgical bond 1.5 Conclusion (1) structural steel and tool steel hardened to be refined by high frequency welding surface pretreatment may be required to meet the organization superplastic deformation conditions, crimping either both or one of the best superplastic deformation temperature and strain rate range of Canon 3 ~ 5rain short deformed crimp joint strength can be achieved at or near the base metal strength of 40Cr. (2) before the steel is crimping, crimping temperature, strain rate and pressure Access time is an important factor in the strength of joints References: [1] Yun-lin and barrels. Qu temperature super-fracture analysis of welded joints [knife of gold again, 1995.81f8) · 384 ~ 388 [2] cabinet Yun Lin et al. Structure constant temperature of copper and tool steel Superplastic solid-phase welding [J]. Welding Technology,[link widoczny dla zalogowanych], 1996.17 <1): 31 ~ 3a [Hu array Puquan. Organization superplasticity [M]. dumb Harbin - Harbin University of dark Press, 198B.173 ~ l86. [4] Xie Yunqing. Superplasticity of a black base profiles [J]. Metal Heat Treatment +1994 (2]: 23. [5] Yang Lu and other wood in the temperature bearing steel GCrI5 Transformation Superplasticity [J] thermal processing technology, l994 (2) 1Z3 ~ 24. [6: T, xatloBAc with. zoned Lu Korean translation. superplastic metals and gold sensitization should be aimed EM3. Beijing Science and the tired social .1983.43 45 . [Chen Wei joint whip after quenching the high part of the region's temperature superplasticity pressure actinides by ID]. Luoyang Luoyang Engineering t night .1999. A deal, which is due by the process B treated tissue samples equivalent to transfer of base metal quality organization, its strength is greater than the supply state of the base metal strength. should refer to the \
相关的主题文章：


[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]