Test method for combining strength in combining process of dissimilar materials

A technology of dissimilar materials and bonding process, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of no composite rolling process experiment, no composite interface strength experiment design, etc.

Active Publication Date: 2015-12-16
SHUNDE GRADUATE SCHOOL UNIV OF SCI & TECH BEIJING
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  • Abstract
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Problems solved by technology

At present, some scholars use thermal simulation experiment machine to design thermal simulation experiment of diffusion welding, but there is no experiment on composite rolling process, and no experimental design on the strength of composite interface under thermal state.

Method used

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  • Test method for combining strength in combining process of dissimilar materials
  • Test method for combining strength in combining process of dissimilar materials
  • Test method for combining strength in combining process of dissimilar materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1: Simulation of interfacial bond strength during rolling of carbon steel and stainless steel clad plates:

[0055] Dimensions: The length of the slab is 2000mm, the thicknesses are 10mm (multilayer) and 90mm (base layer), respectively, and the diameter of the roll is 750mm. The width of the edge strip is 200mm, and the gap between the laminated board and the edge strip is 5mm.

[0056] Temperature: slab temperature 1200°C, roll temperature 300°C, ambient temperature 20°C,

[0057] Speed: slab speed 800mm / s, roll line speed 850mm / s,

[0058] Material: input stainless steel, carbon steel material parameters, including: density, elastic parameters, plastic parameters, thermal expansion coefficient, thermal conductivity coefficient,

[0059] Set the strain to 10%, the process time to 3s, and perform the simulation. After the simulation, select the stable area of ​​the interface, and select the curves of the interface stress S22 and S12 changing with time, as show...

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Abstract

The invention discloses a test method for combining strength in a combining process of dissimilar materials. The method comprises the steps: performing mechanical analysis on the combining process of dissimilar materials by simulation software, and extracting effective combining parameters and correspondingly simplifying the effective combining parameters; inputting experiment related data into a test machine, by setting a time-stress experimental measurement changing curve, setting a stretching velocity and inputting the stretching velocity into test equipment as reaction parameters; performing sample loading according to Gleeble 3500 experiment operation requirements, and finishing experiment parameters by imputing parameters of the test machine; by comparing interface stress strain parameters in the experimental process and the interface state parameters in an actual reaction process, testing actual interface strength parameters, thus obtaining the combining strength parameters of an interface. By performing combining experiment on the interface of the dissimilar materials and detecting the combining strength, the combining conditions and strength numerical values of the interface in different conditions can be accurately judged, and accurate data is provided for production.

Description

technical field [0001] The invention relates to a material strength detection technology, in particular to a method for testing the bonding strength in the bonding process of heterogeneous materials. Background technique [0002] The thermal bonding process of dissimilar materials is mainly through hot rolling method and diffusion welding method to obtain a stable bonding interface with higher strength and higher bonding rate. In the current experimental research and test research, the interface bonding strength research and strength measurement methods are limited to the detection of the interface cold state strength and bonding effect after the bonding reaction is completed, the temperature of the interface tissue returns to normal temperature, and the metal on both sides of the interface diffuses sufficiently. This makes it impossible to know the interface strength of dissimilar materials during the bonding process, and can only be predicted or recursively calculated by s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18
Inventor 臧勇陈博宇管奔
Owner SHUNDE GRADUATE SCHOOL UNIV OF SCI & TECH BEIJING
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