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Explosive welding Ni / Ti double metal composite rod technology and performance of

Shear specimen fracture surface, you can see a large number of dimples,[link widoczny dla zalogowanych], proved fracture is ductile material after processing still has a certain plasticity. To the stress of low temperature annealing, has good processing properties, toughness fracture surface shown in Figure 7 W0RLDNONFERROUETALS9 Academic Council National Nonferrous Metals Processing Proceedings 2.3Ni-Ti bimetallic complex sets of materials processing properties and then processed,[link widoczny dla zalogowanych], using ultrasonic INSPECTION combination of composite rod case, after repeated testing with up to 95% or more, is not binding mainly concentrated in the head and tail. The composite holding the rolling (extrusion). Drawing, processed into the 1.7 m ring thorium Figure 8 glasses of fine wire section cut side photo (continued from page i12) the amount of reduction and increase in the amount of retained austenite,[link widoczny dla zalogowanych], and v and with the plastic zone size The ratio of grain diameter d vr / d increase related to changes in fracture toughness, helping improve the H13 hot work die steel, the fatigue crack growth and thermal fatigue cracking resistance. Therefore, the dual quenching can improve the life of hot work die. 5 Conclusion (1) H13 steel is the new hot die steel,[link widoczny dla zalogowanych], has been widely used at home and abroad. That require high toughness and thermal fatigue resistance, working temperature lower than 700 ℃, mold, use HI3 superior performance and long life. 【2) I {13 steel forging heating temperature of 1065 ~ 1175 ℃, initial forging temperature of IO65 ~ i175 \The total forging ratio ≥ 3. If necessary, stretching through several upsetting, so to forging, forging process to implement change, providing organizational preparations for the heat treatment. (3) H13 steel, the conventional heat treatment process, austenitizing temperature selection in the Union. Then the whole side of the formation of wire frames, after several intermediate annealing softening. Intermediate product testing, the measured tensile strength of silk o1.70 bleed at the nose (processing state) o for the 619 ~ 650MPa. Ni Tl and breaking up the rear in the same section, the access edge wire to do after plastic tensile shear strength test, the tensile-shear strength o, to 3l0 ~ 3501 ~ Pa 30 ~ 50mm length of the repeated interception of bending until fracture, does not appear Ti and Ni layered phenomenon, indicating that processing of composite rod with a satisfactory performance. Figure 8 is a titanium wire cross-section side frames photo. 3 Conclusion (1) Ni, Ti composite rod of metal tube, the process parameters should be controlled at the interface where the waveform 0.05 ≤ ≤ 0.14 the smell,[link widoczny dla zalogowanych], the combination of high strength within the interface of the melt inclusions and brittle ( phase) matter less. (2) optical interface of Ti base observe a large number of twins inside, slightly n-Ti adiabatic shear band, x-ray diffraction (XRD) and micro-spectroscopy (EDS) on TilNi of metal found at the interface Ti interface Ti-Ni-based body has physical form of the table. (3) The processing of Ni / Ti metal rod to take the village, and then rolled into a cover drawing of nickel titanium wire glasses frame side, the process is simple, the combination of high strength composite materials, to meet the edge Sijia requirements, performance close to the Japanese similar products. References iCrosslanOB. ExplosiveWeld 【ng. HottAbin8tonCamb1-【gcCBI6AL: The1d 【ngInst 【tute, 1976,30 ~ 352 Pei Darong and so on. Rare Metal Materials and Engineering, 1997.26 (5) ,51-533 Jan cabinet and other Q-Ti / mild steel explosive combination of mussels composite interface baud thermal shear layer phenomenon. China Nonferrous Metals 1995,6 (2) (liability bream Series Xu Lianfang) loo0 ~ l060 ℃, and the second by 540 ~ 650'C temperature tempering, can obtain better mechanical properties. Head l3 steel tempered at 425 ~ 520 ℃, a secondary hardening at the same time, significant reduction in toughness, so. Should try to avoid the development of areas of brittle temper. (4) composite heat treatment, the double hardening heat treatment process and other advanced applications, the use of steel to improve the HI3 performance and life of great practical significance with reference l i Liu Jing. Light gold extrusion tools and dies report (Volume】 _ Metallurgical Industry Press, l9902 l Liu Jing light air compression tool and die sue the county {the book), Metallurgical Industry Press i9903 LIU Jing-aluminum extrusion die design, manufacture, use, repair reactor technology, metallurgy Press, 19994 Shimei Tang copper mold used to heat North rational, Shanghai Science and Technology Press, 19845 Liu Jingyue - theory and practice of extrusion die, the text of Science and Technology Press, Chongqing Branch Indigo i9896 Tadao other living vine. Die Materials and Hot North Management, Machinery Industry Press, 1982 (Editor Jiangkai Min) 59

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