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Method for detecting bonding strength of babbitt metal and matrix

A technology of babbitt alloy and bonding strength, which is applied in the detection field, can solve the problems that the bonding strength of babbitt alloy and the matrix cannot be quantitatively characterized, the strength value cannot be given, and the sample preparation steps are complicated, so as to achieve easy sample processing and easy sampling Check and analyze the effect of short cycle time

Pending Publication Date: 2021-02-05
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

The soft babbitt alloy is prepared on the high-strength substrate by surfacing welding, so that it can better serve the wear resistance and impact resistance. However, if the bonding strength between the babbitt alloy and the substrate is not good, there will be babbitt alloy Therefore, it is very important to test the bonding strength between the babbitt alloy surfacing layer and the substrate
[0003] In terms of testing the bonding strength of the Babbitt alloy layer, GB / T 12948-91 specifies the destructive test method for the bimetallic bonding strength of sliding bearings. The standard stipulates that the thickness of the Babbitt alloy layer is not less than 2mm, but this standard requires higher dimensional accuracy , the sample preparation steps are relatively complicated; in addition, the Chisel test method is often used in enterprises to quickly and qualitatively analyze the bonding performance of Babbitt alloy and matrix, but it cannot quantitatively characterize the bonding strength of Babbitt alloy and matrix. Unable to give strength value as a reference

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  • Method for detecting bonding strength of babbitt metal and matrix
  • Method for detecting bonding strength of babbitt metal and matrix

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Embodiment Construction

[0020] The technical solutions of the present invention will be further described below through specific embodiments.

[0021] as attached figure 1 Shown, be the detection method of a kind of low-carbon steel surface welding babbitt alloy of the present invention and matrix bonding strength, comprise the steps:

[0022] Step 1: Under the welding currents of 50A, 70A, and 90A, respectively, adopt the arc surfacing method to surfacing the Babbitt alloy layer with a thickness of 4mm on the surface of Q235B low-carbon steel with a thickness of 6mm. The welded workpiece is processed by wire cutting to make a cuboid sample with a length × width × thickness of 10mm × 5mm × 2mm.

[0023] Three workpieces were sampled for each welding current. The components of Babbitt welding consumables and low carbon steel used are shown in Table 1 and Table 2 respectively;

[0024] Step 2: Place the sample in the fixture stably and clamp it firmly;

[0025] Step 3: Place the fixture of the asse...

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Abstract

The invention discloses a detection method for detecting the bonding strength of babbitt metal and a matrix. The method comprises the following steps of: preparing a matrix with a babbitt metal layerprepared on the surface into a shear sample, stably placing the sample in a clamp, performing firm clamping, placing the clamp with the clamped sample on a tensile testing machine platform, pressing the babbitt metal layer downwards along the direction of a surfacing bonding surface at a speed of 0.1mm / s-0.4mm / s by a pressure head until the babbitt metal layer is stripped from the matrix, and stopping pressing; and recording the maximum load and the sectional area of a fracture during stripping of the babbitt metal layer, and calculating the bonding strength value of the babbitt metal layer according to the formula W=F / S. The method can be used for quantitatively measuring the bonding strength of the babbitt metal and the matrix, overcomes the defects of large error and incapability of quantitative rating in qualitative analysis, can acquire precise and visual bonding strength data, and has the advantages of short analysis period, easy sample processing, simple operation, low detectioncost, precise data, high sensitivity and the like.

Description

technical field [0001] The invention belongs to the technical field of detection, and relates to a method for detecting the bonding strength of a surface material and a substrate, in particular to a method for detecting the bonding strength of a babbitt alloy and a substrate. Background technique [0002] Babbitt alloy is widely used in sliding bearings in various mechanical fields because of its excellent wear resistance. The soft babbitt alloy is prepared on the high-strength substrate by surfacing welding, so that it can better serve the wear resistance and impact resistance. However, if the bonding strength between the babbitt alloy and the substrate is not good, there will be babbitt alloy Therefore, it is very important to detect the bonding strength between the babbitt alloy surfacing layer and the substrate. [0003] In terms of testing the bonding strength of the Babbitt alloy layer, GB / T 12948-91 specifies the destructive test method for the bimetallic bonding str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 周方明魏通达张庆亚徐冬豪石铭霄
Owner JIANGSU UNIV OF SCI & TECH
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