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Rolling connection method for dissimilar refractory metal molybdenum and stainless steel composite board

A technology of refractory metal and connection method, applied in metal rolling, roll speed control, temperature control and other directions, can solve the problems of low low temperature impact toughness of intermetallic compounds and molybdenum, large difference in physical properties between molybdenum and stainless steel, and high welding stress , to achieve the effect of high application value, high bonding strength and high impact toughness

Inactive Publication Date: 2009-02-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a rolling connection method for heterogeneous refractory metal molybdenum and stainless steel clad plate to solve the problem of high welding stress caused by the large difference in physical properties between molybdenum and stainless steel, and the direct connection is easy to form a large number of Intermetallic compounds with high hardness and high brittleness and low temperature impact toughness of molybdenum

Method used

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  • Rolling connection method for dissimilar refractory metal molybdenum and stainless steel composite board

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specific Embodiment approach 1

[0010] Specific implementation mode one: combine figure 1 Illustrate present embodiment, the rolling connection method of present embodiment is finished like this: one, get stainless steel plate 1, molybdenum plate 2 and red copper foil 3 stand-by, earlier connect the connection surface of stainless steel plate 1 and molybdenum plate 2 Milling and flattening, pickling the stainless steel plate 1, molybdenum plate 2 and copper foil 3, then stacking the stainless steel plate 1 and molybdenum plate 2 together, sandwiching the copper foil 3 between the stainless steel plate 1 and the molybdenum plate 2 to form three layers Metal plate, one end of the three-layer metal plate is fixed together by two rivets 4 to form a composite plate; 2. Put the above-mentioned composite plate into a vacuum chamber, when the vacuum degree reaches (1~3)×10 -3 When Pa starts to heat the clad plate, the heating temperature is 850-1050°C, and the heating rate is 300-600°C / h, after that, the clad plate ...

specific Embodiment approach 2

[0012] Specific implementation mode two: combination figure 1 To illustrate this embodiment, in step 1 of this embodiment, the thickness of the copper foil 3 used is 0.1-0.5 mm, and the thickness of the milled stainless steel plate 1 and the molybdenum plate 2 are 1-20 mm respectively. The reliable connection between the titanium alloy plate 2 and the stainless steel plate 1 can be ensured. Other rolling connection methods are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Specific implementation mode three: combination figure 1 Describe this embodiment, in step one of this embodiment, drill two through holes on the upper surface of one end of the three-layer metal plate, press two rivets 4 into the two through holes respectively, and the two ends of the rivets 4 are connected to the three through holes. The upper and lower surfaces of the layer metal plates are flush.

[0014] In this embodiment, a hydraulic universal testing machine is used to press the rivet 4 into the three-layer metal plate. After the rivet 4 is compressed, the cross-sectional area expands to fix the plate to be rolled and connected, and prevent it from being rolled during the rolling process. separated under the action of force. Other rolling connection methods are the same as in the first embodiment.

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Abstract

A rolling and connecting method of heterogeneous refractory metal molybdenum and stainless steel clad plates relates to a composition method of a heterogeneous refractory metal molybdenum and the stainless steel clad plate, aiming at the problems that owing to the great difference between the physical properties of molybdenum and stainless steel, the welding stress is high, great amount of intermetallic compounds with high hardness and great brittleness can be easily produced due to direct connection, and the impact ductility of molybdenum is low in the condition of low temperature, etc. The method comprises the steps that: the connecting surface of a stainless steel plate and a molybdenum plate is milled to be flat; after the acid cleaning of the stainless steel plate, the molybdenum plate and purple copper foil, the purple copper foil is placed and fixed between the stainless steel plate and the molybdenum plate to form the clad plate which is then placed into a vacuum chamber; the vacuity is (1 to 3) multiplied by 10<-3>Pa, the heating temperature is 850 to 1050 DEG C, and the heating speed is 300 to 600 DEG C / h; after the insulation for 10 to 45 minutes, the clad plate is rolled and connected; the rolling temperature is 850 to 1050 DEG C, the compression rate is 15 to 35 percent and the rolling speed is 0.038 to 0.2m / s; the clad plate after being rolled is cooled to be below 200 DEG C in vacuum and then the clad plate is taken out. The method can realize the purpose of the high strength connection between the molybdenum, the ductility of which is low in the condition of low temperature, and the stainless steel.

Description

technical field [0001] The invention relates to a method for compounding heterogeneous refractory metal molybdenum and stainless steel clad plates. Background technique [0002] Molybdenum is a refractory metal with high melting point, high thermal strength, high elastic modulus and excellent corrosion resistance. Molybdenum has high hardness and is difficult to machine. Molybdenum and its alloys have important application values ​​in aerospace, atomic energy, electronics and civil industries. They can be used as rocket engine nozzle materials, high-temperature and molten salt reactor structural materials, high-temperature furnace heating elements and reflective screen materials. Metal materials that are indispensable in a series of working fields that require high working temperature and corrosion resistance, such as liquid metal and molten glass corrosion. Because molybdenum does not react with hydrogen, molybdenum is the best material for hydrogen high temperature furna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B37/74B21B37/56B21B37/46
Inventor 赵东升闫久春杨士勤
Owner HARBIN INST OF TECH
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