CN103808566A - Compressive strength testing method of shaft - Google Patents
Compressive strength testing method of shaft Download PDFInfo
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- CN103808566A CN103808566A CN201310724872.8A CN201310724872A CN103808566A CN 103808566 A CN103808566 A CN 103808566A CN 201310724872 A CN201310724872 A CN 201310724872A CN 103808566 A CN103808566 A CN 103808566A
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Abstract
The invention relates to a compressive strength testing method of a shaft. The range of pressure capable of breaking a workpiece can be determined by loading workpieces step by step; then the pressure value for breaking is determined precisely by a bisection method. The compressive strength testing method of the shaft has the advantages of simplicity, convenience, intuition, high operability, data reliability and accuracy and the like.
Description
Technical field
The invention belongs to the mechanical property detection technique technical field of metal material, particularly relate to a kind of intensity test method of axle part.
Background technology
In actual applications, often require axial workpiece to there is the combination properties such as higher intensity, toughness, skin hardness and wearing quality simultaneously.Carburizing is a kind of chemical heat treatment process often adopting, after part carburizing through quenching and lonneal, can improve surface and core structure, obtain the superficial layer of hard high-strength, subsurface stratum and the heart portion of certain toughness, tough in outer hard, high strength and certain toughness comprehensively on same part.
Under some service condition, the compressive strength of carburizing axle is to determine the axial workpiece key factor in serviceable life.Therefore, in order to guarantee the normal use of part and the safe handling of machine, must measure the compressive strength of carburizing axle, but up to the present, temporarily without the data of publishing.
Summary of the invention
The present invention provides a kind of intensity test method of axle part for solving the technical matters existing in known technology, the method can effectively be measured the compressive strength of Axle Surface strengthening layer and matrix.
The technical scheme that the present invention takes for the technical matters existing in solution known technology is:
An intensity test method for axle part, is characterized in that:
Comprise the following steps: a, carburizing heat treatment step;
B, finishing step to Axle Surface, described finishing step is grinding part outer on cylindrical grinder;
C, processing test surfaces step: on surface grinding machine, the cylindrical of test block one side grinding is removed to 0.1-0.9mm, process plane;
D, lay part to be tested step: test block is securely fixed on V shape iron, makes planar horizontal upward, be then placed on universal testing machine, the fault lattice of testing machine are 200-10000KN;
The compression test of e, test block: test force is loading from 200KN, loading velocity is 0-12KN/S.Add to after test load, keep 0-60min, then unloading;
F, observe test block: take off test block from testing machine, successively with the naked eye, the calmodulin binding domain CaM of microscopic examination test block surface, matrix and surface and the matrix of 10 times of magnifieres and 250 times;
If g test block is the intact vestige that there is no any damage still, test pressure is increased to 200KN at every turn, and repeat the operation of above-mentioned d, e, f item;
H, in the time observing test block and have micro-crack or other to damage, its corresponding test pressure is reduced to 10KN, then change an identical test block and test under identical test condition; Now, if it is still intact to observe test block, test pressure is increased to 5KN; If test block damages, test pressure is reduced to 5KN;
I, by that analogy, adopts and increases progressively successive subtraction method, increases or the test force that reduces is that upper level test block damages and the half of corresponding test force difference under intact test condition at every turn, is finally accurate to 1KN to test force;
J, final test power when recording test block and damaging: be compressive strength divided by the area of test block plane by this power value.
The present invention can also be by the following technical solutions:
Preferably, described to the finishing step of axial workpiece in, the surfaceness of grinding is 0.4um.
Preferably, in described processing test surfaces step, the surfaceness of grinding is 0.4um.
Advantage and good effect that the present invention has are:
Because the present invention adopts technique scheme, by the loading step by step to workpiece, determine and can realize the pressure limit of destroying to workpiece, then adopt two points of approximatiosses, accurately determine the force value that can realize destruction.That this method of testing has is easy, directly perceived, workable, the reliable advantage such as accurate of data.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A cut-open view of Fig. 1.
In figure: 1, surface strengthen layer; 2, matrix.
Embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and join platform accompanying drawing
Be described in detail as follows:
Be ground to a side and be the planform of workpiece of plane as shown in Fig. 1 Fig. 2.
An intensity test method for axle part, comprises the following steps:
A, carburizing heat treatment step: adopt gas carbonizing method for the workpiece after machine work, heating-up temperature is 900-9300C, and temperature retention time is 4-7h, and carburizing test block is cooled to 760-850 ℃ of direct quenching, then at 160-2000 ℃ of tempering 2-3h;
B, finishing step to Axle Surface, described finishing step is grinding part outer on cylindrical grinder, the surfaceness of grinding is 0.4-1.6um;
C, processing test surfaces step: on surface grinding machine, the cylindrical of test block one side grinding is removed to 0.1-0.9mm, process plane, the surfaceness of grinding is 0.4-1.6um;
D, lay part to be tested step: test block is securely fixed on V shape iron, makes planar horizontal upward, be then placed on testing machine, the specification of testing machine is 200-10000KN;
The compression test of e, test block: test force is loading from 200KN, adds to after test load, keeps the regular hour, then unloading;
F, observe test block: take off test block from testing machine, successively with the naked eye, the calmodulin binding domain CaM of microscopic examination test block surface, matrix and surface and the matrix of 10 times of magnifieres and 250 times;
If g test block is the intact vestige that there is no any damage still, test pressure is increased to 200KN at every turn, and repeat above-mentioned d, e, the operation of f item;
H, in the time observing test block and have micro-crack or other to damage, its corresponding test pressure is reduced to 10KN, then change an identical test block and test under identical test condition; Now, if it is still intact to observe test block, test pressure is increased to 5KN; If test block damages, test pressure is reduced to 5KN;
I, by that analogy, adopts and increases progressively successive subtraction method, increases or the test force that reduces is that upper level test block damages and the half of corresponding test force difference under intact test condition at every turn, is finally accurate to 1KN to test force;
J, final test power when recording test block and damaging: be compressive strength divided by the area of test block plane by this power value.
Claims (3)
1. an intensity test method for axle part, is characterized in that: comprise the following steps:
A, carburizing heat treatment step;
B, finishing step to Axle Surface, described finishing step is grinding part outer on cylindrical grinder;
C, processing test surfaces step: on surface grinding machine, by the cylindrical of test block one side grinding 0.1-0.5mm, process plane;
D, lay part to be tested step: test block is securely fixed on V shape iron, makes planar horizontal upward, be then placed on testing machine, the specification of testing machine is 200-10000KN;
The compression test of e, test block: test force is loading from 200KN, loading velocity is 0-12KN/S, adds to after test load, keeps 0-60min, then unloading;
F, observe test block: take off test block from testing machine, successively with the naked eye, the calmodulin binding domain CaM of microscopic examination test block surface, matrix and surface and the matrix of 10 times of magnifieres and 250 times;
If g test block is the intact vestige that there is no any damage still, test pressure is increased to 200KN at every turn, and repeat the operation of above-mentioned d, e, f item,
H, in the time observing test block and have micro-crack or other to damage, its corresponding test pressure is reduced to 10KN, then change an identical test block and test under identical test condition; Now, if it is still intact to observe test block, test pressure is increased to 5KN; If test block damages, test pressure is reduced to 5KN;
I, by that analogy, adopts and increases progressively successive subtraction method, increases or the test force that reduces is that upper level test block damages and the half of corresponding test force difference under intact test condition at every turn, is finally accurate to 1KN to test force,
J, final test power when recording test block and damaging: be compressive strength divided by the area of test block plane by this power value.
2. the intensity test method of a kind of axle part according to claim 1, is characterized in that: described in the finishing step of axial workpiece, the surfaceness of grinding is 0.4-1.6um.
3. the intensity test method of a kind of axle part according to claim 1, is characterized in that: in described processing test surfaces step, the surfaceness of grinding is 0.4-1.6um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310724872.8A CN103808566A (en) | 2013-12-19 | 2013-12-19 | Compressive strength testing method of shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310724872.8A CN103808566A (en) | 2013-12-19 | 2013-12-19 | Compressive strength testing method of shaft |
Publications (1)
| Publication Number | Publication Date |
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| CN103808566A true CN103808566A (en) | 2014-05-21 |
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| CN201310724872.8A Pending CN103808566A (en) | 2013-12-19 | 2013-12-19 | Compressive strength testing method of shaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823659A (en) * | 2016-03-15 | 2016-08-03 | 南昌航空大学 | Manufacturing technology of test block for comparison of micro cracks in thermal barrier coating of engine blade |
| CN112461524A (en) * | 2020-11-19 | 2021-03-09 | 苏州卓胜工贸有限公司 | Testing method capable of simultaneously testing automatic locking strength of multiple containers |
-
2013
- 2013-12-19 CN CN201310724872.8A patent/CN103808566A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823659A (en) * | 2016-03-15 | 2016-08-03 | 南昌航空大学 | Manufacturing technology of test block for comparison of micro cracks in thermal barrier coating of engine blade |
| CN112461524A (en) * | 2020-11-19 | 2021-03-09 | 苏州卓胜工贸有限公司 | Testing method capable of simultaneously testing automatic locking strength of multiple containers |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |
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| WD01 | Invention patent application deemed withdrawn after publication |