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A metal composite material with high strength, high toughness and high magnetic performance and its preparation

A composite material, high-strength and high-toughness technology, which is applied in metal rolling, manufacturing tools, heat treatment equipment, etc., can solve the problems of poor safety and controllability of the preparation process, achieve strong interface bonding, avoid interface oxidation, and solve interface problems. poor binding effect

Active Publication Date: 2021-07-02
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although the explosive cladding method can be used to prepare large-area layered composite materials, the safety and controllability of the preparation process are inferior to those of the rolling cladding method.

Method used

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  • A metal composite material with high strength, high toughness and high magnetic performance and its preparation
  • A metal composite material with high strength, high toughness and high magnetic performance and its preparation
  • A metal composite material with high strength, high toughness and high magnetic performance and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a double-layer layered composite metal material, which is prepared through the following steps:

[0037] CM400 and 316L plates with a thickness of 2mm are used as original blanks, and the plates are cleaned and polished and stacked alternately as blanks (such as figure 2 as shown in a);

[0038] Put the stacked billets into the vacuum hot-press furnace, and evacuate to 10 -3 torr, and apply a preload pressure of about 2Mpa;

[0039] Raise the temperature to 1200°C at a rate of 10°C / S, apply pressure up to 30MPa, and keep the pressure for 15 minutes, unload, cool, and take out the billet;

[0040] The billet is cold-rolled, the rolling speed is 5m / min, the downforce is 5%, 1 pass;

[0041] Carry out heat treatment on the billet after rolling, the heat treatment process is: 820°C / 2h (air cooling) + 500°C / 4h (air cooling), thus obtaining ultra-high strength maraging steel / austenitic stainless steel layered metal composite material, the interfa...

Embodiment 2

[0045] image 3 The rod-shaped layered composite metal material trial-produced in Example 1 was used to detect the interface bonding strength between the martensite layer and the austenite layer with different deformation amounts.

[0046] It can be seen from Table 2 that the interfacial bonding strength of the hot-compressed state and the aged state is higher than that of the base metal, and both fracture on the austenite side.

Embodiment 3

[0048] Table 3 shows that the vacuum degree is 10 -1 Under torr, the interfacial bonding strength between the martensite layer and the austenite layer under different deformations of the bar-shaped layered composite metal material trial-produced according to Example 2.

[0049] It can be seen from Table 3 that the interfacial bond strength decreased significantly due to the decrease of vacuum degree.

[0050] Figure 4 and Figure 5 are the fracture morphology of the hot-pressed and peak-aged tensile samples under the condition of 20% deformation, respectively. It can be found that at the fracture position, that is, at the interface, due to the low vacuum, serious deformation occurs at the interface during the hot-pressing process. Oxidation phenomenon, resulting in a sharp decrease in interface strength.

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Abstract

The purpose of the present invention is to provide a layered metal composite material and its preparation method, characterized in that: the composite material is made of maraging steel plates with high magnetic properties and ultra-high strength properties and non-magnetic high toughness austenite Composite stainless steel sheet. The layered metal composite material obtained by the preparation method of the invention has excellent interfacial bonding, no defects such as oxides, holes, microcracks, unbonding and the like at the interface, and has strong interfacial bonding ability.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a layered metal composite material with high strength, toughness and excellent magnetic properties and a preparation method thereof. manufacturing. It belongs to the technical field of materials and their preparation. Background technique [0002] Due to its extremely high strength, ultra-high-strength maraging steel has become a high-quality material in aerospace, military equipment and other fields. However, due to its ultra-high strength, it is essentially a brittle material with poor room temperature plasticity. , low toughness, which seriously restricts the application of this material. [0003] Studies at home and abroad have shown that adding layered ductile materials in the middle of high-strength materials can greatly improve the plasticity and toughness of tough materials. The schematic diagram of this method is shown in figure 1 shown. At pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/08C22C38/18C22C33/00C21D9/00C21D8/02C21D6/00B21B1/38
Inventor 王威张乐杨柯单以银严伟石全强
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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