Intermetallic compound strengthening and toughening heterostructure zirconium alloy and preparation method thereof
An intermetallic compound and heterostructure technology, applied in metal rolling, metal rolling, metal processing equipment and other directions, can solve the problems of zirconium metal strength and plasticity need to be improved, and achieve good application prospects, processing flow and technological requirements low effect
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[0032] The invention provides a method for preparing a zirconium alloy with a heterogeneous structure strengthened and toughened by an intermetallic compound, comprising the following steps:
[0033] The zirconium alloy ingot is pretreated, and the zirconium alloy ingot containing the AlZr3 phase is obtained after the first cooling; the zirconium alloy ingot includes an α-Zr matrix and an intermetallic compound AlZr2; the temperature of the pretreatment is 800-1000°C , holding time is 5 ~ 250min;
[0034] The zirconium alloy ingot containing the AlZr3 phase is hot-rolled, and after the second cooling, an intermetallic compound-strengthened heterostructure zirconium alloy is obtained; the temperature of the hot-rolling is 700-950°C.
[0035] In the invention, the zirconium alloy ingot is pretreated, and the zirconium alloy ingot containing AlZr3 phase is obtained after the first cooling.
[0036] In the present invention, the zirconium alloy ingot includes an α-Zr matrix and a...
Embodiment 1
[0061] According to the comprehensive combination of pretreatment and hot rolling treatment, 800°C pretreatment and heat preservation for 30 minutes are water-cooled, and 950°C hot rolling is water-cooled (800-30wc-950HRwc). The specific preparation process is as follows:
[0062] Pretreatment: Heat up the vacuum tube furnace to 800°C at a heating rate of 10°C / min, then add the raw material zirconium alloy ingot, evacuate to -0.1MPa, take it out quickly after holding for 30 minutes, and cool it with water to obtain a zirconium alloy containing AlZr3 phase ingot;
[0063] Grind off a small amount of oxide skin remaining on the surface of the zirconium alloy ingot containing the AlZr3 phase, use 400 mesh to 1500 mesh sandpaper for polishing, and heat up the muffle furnace to 950°C at a heating rate of 10°C / min, then put the AlZr3 phase The zirconium alloy ingot was placed in a muffle furnace for heat preservation for 30 minutes, and then immediately taken out and hot-rolled on a...
Embodiment 2
[0065] According to the comprehensive combination of pretreatment and rolling treatment, 850°C pretreatment and heat preservation for 45 minutes are air-cooled, and 850°C hot rolling is air-cooled (850-45ac-850HRac). The specific preparation process is as follows:
[0066] Pretreatment: Heat up the vacuum tube furnace to 850°C at a heating rate of 10°C / min, then add the raw material zirconium alloy ingot, evacuate to -0.1MPa, take it out quickly after holding for 45min, and air-cool to obtain a zirconium alloy containing AlZr3 phase ingot;
[0067] Grind off a little scale remaining on the surface of the zirconium alloy ingot containing the AlZr3 phase, use 400 mesh to 1500 mesh sandpaper for polishing, and heat up the muffle furnace to 850°C at a heating rate of 10°C / min. The zirconium alloy ingot was placed in a muffle furnace for heat preservation for 30 minutes, and then immediately taken out and hot-rolled on a two-roll mill at a rolling temperature of 850°C. Multi-pass r...
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