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Mn-containing creep-resisting rolled zinc alloy belt material and preparation method thereof

A zinc alloy, plate and strip technology, applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of insufficient systematic and in-depth research, comprehensive performance needs to be improved, narrow research content, etc., to achieve excellent creep resistance Variable performance, excellent mechanical properties, and simple production process

Inactive Publication Date: 2010-12-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Domestic research on creep-resistant zinc alloy sheet and strip is almost blank. Since the late 1990s, Guangzhou Institute of Metallurgy and Central South University have conducted preliminary research on creep-resistant zinc alloy sheet and strip, but the research content is narrow and the research not systematic enough
In 1999, the Guangdong Metallurgical Research Institute trial-produced several grades of zinc-copper-titanium alloy products for the continuous casting and rolling production line of Guangzhou Zinc Sheet Factory, and studied its creep resistance. Although the creep resistance has improved, it is not significant. , and the overall performance needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2、3 and 4

[0045] Production process: raw material preparation and batching→smelting intermediate alloy→melting and casting→homogenizing annealing→hot rolling→cold rolling→annealing→finished product.

[0046] The specific process is: when smelting, first add zinc ingot and covering agent, after melting, add Zn-Ti, Zn-Cu, Zn-Mn in the middle according to the proportion of ingredients corresponding to 1, 2, 3 and 4 in Table 1 Alloy, copper, titanium and manganese are melted in the zinc solution and evenly distributed, the melting temperature is 650-690°C; cast at 460-480°C, the thickness of the ingot is 30mm; the homogenization annealing temperature of the ingot is 350°C, the holding time 10h; After the ingot is homogenized and annealed, it is hot-rolled in multiple passes at 220°C, with a deformation of 30-50% in each pass, and a total deformation of 85-95%, and then cold-rolled, with a deformation of 15-25% in each pass, and a total deformation of 15-25%. The amount of deformation is 50-...

Embodiment 5 and 6

[0048] Production process: raw material preparation and batching→smelting intermediate alloy→melting and casting→homogenizing annealing→hot rolling→cold rolling→annealing→finished product.

[0049] The specific process is: when smelting, first add zinc ingot and covering agent, after melting, add Zn-3Ti, Zn-10Cu, Zn-29.6Mn master alloy, pure Aluminum, copper, manganese, titanium and aluminum are melted in the zinc solution and evenly distributed, the melting temperature is 690-710°C; casting at 420-460°C, the ingot thickness is 40mm; the ingot homogenization annealing temperature is 360°C , holding time 8h; after homogenizing annealing, the ingot is hot-rolled in multiple passes at 240°C, the deformation of each pass is 25-45%, and the total deformation is 70-85%, and then cold-rolled, the deformation of each pass is 10-20 %, the total deformation is 60-70%; the strip is annealed at 200°C for 2 hours after rolling.

Embodiment 7 and 8

[0051] Production process: raw material preparation and batching→smelting intermediate alloy→melting and casting→homogenizing annealing→hot rolling→cold rolling→annealing→finished product.

[0052] The specific process is: when smelting, first add zinc ingots and covering agents, and after melting, add Zn-3Ti, Zn-10Cu, Zn-29.6Mn, rare earth Elements, copper, manganese and titanium are melted in the zinc solution and distributed evenly, the melting temperature is 700-740°C; cast at 430-450°C, the thickness of the ingot is 50mm; the uniform annealing temperature of the ingot is 370°C, heat preservation The time is 8 hours; after the ingot is homogenized and annealed, it is hot-rolled in multiple passes at 260°C, the deformation of each pass is 25-40%, and the total deformation is 60-75%, and then cold-rolled, the deformation of each pass is 15-25%. The total deformation is 65-80%; the strip is annealed at 200°C for 3 hours after rolling.

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Abstract

The invention relates to a Mn-containing creep-resisting rolled zinc alloy belt material. The material comprises the following components in percentage by weight: 0.5 to 3.0 percent of copper, 0.01 to 2.0 percent of manganese, 0.05 to 0.3 percent of titanium and the balance of zinc and less than 0.05 percent of impurities. An alloy component can also contain the following component in percentage by mass: 0.01 to 0.5 percent of X, wherein the X is at least one of aluminum and rare earth elements (Ce+La). A method for preparing the material comprises the following steps of: smelting by a protective covering method and adding alloy elements in the forms of pure zinc, Zn-Cu, Zn-Ti, Cu-Mn, pure aluminum and Ce+La composite rare earth, wherein a smelting temperature is between 650 and 740 DEG C; pouring at the temperature of between 420 and 480 DEG C; uniformly annealing cast ingots at the temperature of between 350 and 380 DEG C for 6 to 10 hours; performing hot rolling for multiple times at the temperature of between 220 and 280 DEG C, wherein total deformation is between 60 and 95 percent; performing cold rolling, wherein the total deformation is between 50 and 80 percent; and after rolling, annealing at the temperature of between 180 and 200 DEG C for 2 to 3 hours. The alloy of the invention has high creep resistance, hot processing performance and mechanical property and is suitable for the fields of building decoration, transportation, instruments, meters and the like.

Description

technical field [0001] The invention relates to a zinc alloy sheet and strip and a preparation method thereof, in particular to a Mn-containing creep-resistant rolled zinc alloy sheet and strip and a preparation method thereof; belonging to the technical field of manufacturing metal alloy materials. Background technique [0002] Zinc alloy is about 25% lighter than copper and about 10% lighter than steel. It has good casting performance and can die-cast precision parts with complex shapes and the casting surface is smooth. However, the creep resistance of zinc alloys is low, especially when impurity elements such as lead, cadmium, and tin exceed the standard, causing zinc alloys to age and deform, manifested as volume expansion, mechanical properties, especially plasticity, significantly decreased, and even rupture after a long time. make its application limited. Therefore, creep-resistant zinc alloys came into being to expand the application range of zinc alloys. Creep-re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/02C22C1/03C22F1/16B21B37/00
Inventor 肖来荣孙泉胜万磊王艳李威胡加瑞刘彦
Owner CENT SOUTH UNIV
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