A method and device for preparing static tensile samples of steel wires with a cross-sectional diameter of 2-10mm

A technology for tensile specimens and steel wires, applied in the preparation of test samples, measuring devices, sampling, etc., can solve the problem of inability to accurately obtain conventional mechanical performance indicators, inability to obtain accurate stress and strain values, and difficulty in obtaining effective data guidance Steel wire and other problems, to achieve the effect of good sample performance, simple structure and good cooling effect

Inactive Publication Date: 2019-02-15
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The uniaxial tensile test is an important test method for the mechanical properties of metals. Yield strength, tensile strength, elongation after fracture and reduction of area can be determined through this test. Carry out machining as a standard sample, and use the method of directly clamping the steel wire to easily cause the clamping part to break or be damaged, so that the conventional mechanical performance indicators cannot be accurately obtained, and the accurate stress and strain values ​​cannot be obtained. The test data is inaccurate and unreliable , the accuracy is poor, which makes it more difficult to solve the processing index, and it is difficult to obtain effective data to guide the production of steel wire and steel rope enterprises

Method used

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  • A method and device for preparing static tensile samples of steel wires with a cross-sectional diameter of 2-10mm
  • A method and device for preparing static tensile samples of steel wires with a cross-sectional diameter of 2-10mm
  • A method and device for preparing static tensile samples of steel wires with a cross-sectional diameter of 2-10mm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: a kind of cross-section diameter 2-10mm steel wire static tensile sample preparation method, comprises the following steps:

[0029] (1) Sample loading: Pass one end of the steel wire with a cross-sectional diameter of 2-10 mm through the center of the barrel lid of the sample preparation device and then lean against the middle of the bottom side of the drum. The bottom of the barrel lid is set as an arc-shaped transition surface. Sample standard production;

[0030] (2) Casting solution: Put the low-melting point metal Sn into the graphite crucible and heat it to above 232°C in a box furnace to melt it;

[0031] (3) Pouring the metal Sn solution melted in step (2) into the drum in step (1) through the sprue, covering the surrounding of the metal material, and after the metal Sn around the metal material is solidified, remove it from the sample preparation Take it out from the device to obtain one end of the steel wire tensile material sample to complete ...

Embodiment 2

[0037] Embodiment 2: as Figure 1-Figure 5 As shown, a steel wire static tensile sample preparation device with a cross-sectional diameter of 2-10mm includes a drum 1 and a drum cover 2. A blind cone hole 8 for placing a sample is arranged in the middle of the inner bottom of the drum 1, and the upper end is A barrel cover 2 is provided, the barrel wall of which is a hollow cavity 3, the middle part of the barrel cover 2 is provided with a through hole 9 passing through the sample, and the barrel cover 2 is provided with a pouring port 10, and the lower side is provided with a The arc-shaped transition surface 12 protrudes downwards. The cavity 3 includes an outer wall 4 and an inner wall 5 . The outer wall 4 is provided with a water inlet 6 and a water outlet 7 communicating with the cavity 3 .

[0038] Preferably, the above-mentioned barrel cover 2 and the drum 1 are connected by threads, which can be quickly installed and the operation is convenient and fast.

[0039]Prefe...

Embodiment 3

[0044] Embodiment 3: First, brush a layer of demoulding material on the inner wall of the drum of the sample preparation device, then cut the steel wire with a cross-sectional diameter of 2-10mm into a preliminary sample with a minimum length of 5 times the diameter and fix it vertically on the drum and the lid of the sample preparation device After the sample is fixed, put the low-melting point metal Sn into the graphite crucible and melt it through the laboratory box furnace above 232°C. After the metal Sn in the crucible is melted, use crucible tongs to remove it from the In order to prevent the crucible from breaking due to partial cooling, when using crucible tongs to hold a hot crucible, the tip of the tongs must be preheated first, and then the metal Sn solution in the crucible must be scooped out with a spoon. The sprue of the barrel cover in the sample preparation device pours the metal Sn solution around the metal material. In order to avoid the impact of the high tem...

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Abstract

The invention discloses a device and a method for preparing a static stretching sample of a steel wire with a section diameter being 2-10mm. The device comprises a drum and a drum cover, the middle of the inner bottom of the drum is provided with a blind taper hole, the drum cover is arranged at the upper end of the drum wall which forms a cavity, the middle of the drum cover is provided with a through hole and a sprue, the lower side of the drum cover is provided with an arc transition surface protruding downwards, and the outer wall of the cavity is provided with a water inlet and a water outlet. One end of the stretching sample is vertically put into the device, and cooling water is fed into the cavity to solidify poured molten metal Sn. The device and the method for preparing the static stretching sample of the steel wire with the section diameter being 2-10mm have universality; by cooling outside the drum, solidification time of metal Sn solution can be shortened, and influences of overhigh temperature of molten metal Sn solution on textures of metal materials are avoided; due to self-positioning of the metal materials by the blind taper hole of the drum, positioning accuracy is realized while thickness uniformity of surrounding solidified metal Sn is guaranteed; in addition, the device has the advantages of structural simplicity, light weight, convenience, small size, convenience in assembly and disassembly, low manufacturing cost, time saving, labor saving and the like.

Description

technical field [0001] The invention relates to a sample preparation method and device for a steel wire static tensile sample with a section diameter of 2-10mm, and belongs to the technical field of sample preparation of metal materials for material analysis and testing. Background technique [0002] The uniaxial tensile test is an important test method for the mechanical properties of metals. Yield strength, tensile strength, elongation after fracture and reduction of area can be determined through this test. Carry out machining as a standard sample, and use the method of directly clamping the steel wire to easily cause the clamping part to break or be damaged, so that the conventional mechanical performance indicators cannot be accurately obtained, and the accurate stress and strain values ​​cannot be obtained. The test data is inaccurate and unreliable , the accuracy is poor, which makes it more difficult to solve the processing index, and it is difficult to obtain effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 向嵩梁宇梁益龙石维杨明冀宣名
Owner GUIZHOU UNIV
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