CN212674599U

CN212674599U - Steel hydrogen embrittlement test device

Info

Publication number: CN212674599U
Application number: CN202021177728.9U
Authority: CN
Inventors: 周兰兰; 黄爱霞
Original assignee: Xinchang Hongji Electronic Technology Co ltd
Current assignee: Xinchang Hongji Electronic Technology Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-03-09
Anticipated expiration: 2030-06-23

Abstract

The utility model discloses a steel hydrogen embrittlement test device, including bottom plate, hydraulic stem, test bar, shrouding, spacing casing and spring, the welding of the upper surface four corners position department of bottom plate has the bracing piece, and the lower surface welding of bottom plate has the supporting seat, the lower surface welding of shrouding is on the top of bracing piece, the intermediate position department of test bar is equipped with the test breach, and the both ends symmetrical welding of test bar has the roof, the roof activity is pegged graft in the inside of spacing casing, the threaded rod is installed to the avris equidistance screw thread of spacing casing, threaded rod and roof contact each other, the outer surface welding of spacing casing has the link, and the tether has the connection rope on the link, and the one end that the connection rope deviates from the link is established on the hydraulic. The utility model discloses, compact structure, it is convenient to use, is convenient for accomplish tensile test, simplifies the fixed step of work piece, improves device stability, satisfies personnel's user demand.

Description

Steel hydrogen embrittlement test device

Technical Field

The utility model relates to a steel material test technical field specifically is a steel hydrogen embrittlement test device.

Background

Hydrogen embrittlement is the dissolution of hydrogen in steel, and the hydrogen molecules are polymerized to cause stress concentration, and the stress concentration exceeds the strength limit of steel, and fine cracks, also called white spots, are formed in the steel. Hydrogen embrittlement is only preventive and not curative. Once hydrogen embrittlement occurs, it is impossible to eliminate the embrittlement and even cracking of the material caused by the internal residual or external stress of trace hydrogen introduced into the steel during the smelting process of the material and the manufacturing and assembling process of parts, such as electroplating and welding.

Hydrogen embrittlement defines the three requirements of a high strength structural steel for catastrophic brittle fracture induced by hydrogen at relatively low in-use stresses, the steel having to be heat treated to some relatively high strength level. In general, as the strength level of the steel increases, the time to break decreases and the steel must withstand a static tensile stress above a certain minimum value. This minimum stress value depends on the strength level of the steel, which must contain more than a certain-minimum amount of hydrogen, which must be able to diffuse freely through the steel, and hydrogen embrittlement occurs, i.e. hydrogen migrates under stress towards the stress concentration zone. Hydrogen weakens the internal bonding forces of the steel in some way. When sufficient hydrogen has accumulated, cracking begins. The high stress and hydrogen migration to the crack tip continues until fracture occurs, hydrogen migrates to the stress concentration site, and hydrogen concentration is maximized.

When a notch workpiece is stretched in a traditional hydrogen embrittlement notch tensile test, the force applied by the workpiece is unstable, and the fixing step is complicated, so that a tensile test device is needed to meet the use requirements of personnel.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steel hydrogen embrittlement test device possesses compact structure, and it is convenient to use, is convenient for accomplish tensile test, simplifies the fixed step of work piece, improves device stability, satisfies personnel's user demand's advantage, solves traditional hydrogen embrittlement breach tensile test when tensile breach work piece, and the work piece application of force is unstable, and fixed step is comparatively loaded down with trivial details, needs a tensile test device to satisfy personnel's user demand's problem for this reason.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a steel hydrogen embrittlement test device, includes bottom plate, hydraulic stem, test bar, shrouding, spacing casing and spring, the welding of the upper surface four corners position department of bottom plate has the bracing piece, and the lower skin weld of bottom plate has the supporting seat, the lower skin weld of shrouding is on the top of bracing piece, the intermediate position department of test bar is equipped with the test breach, and the both ends symmetrical welding of test bar has the roof, the roof activity is pegged graft in the inside of spacing casing, the threaded rod is installed to the avris equidistance screw thread of spacing casing, threaded rod and roof contact each other, the outer skin weld of spacing casing has the link, and the tether has the connection rope on the link, connects the one end that the rope deviates from the link and.

Preferably, the bottom end of the inner wall of the limiting shell is welded with an installation frame, the lower surface of the installation frame is welded with a spring, and the lower surface of the spring is in contact with the top plate.

Preferably, the top plate is located between the spring and the threaded rod, and the original length of the spring is greater than the depth of the limiting shell.

Preferably, the upper surface of bottom plate and the lower surface of shrouding all install the pneumatic cylinder through the bolt, and movable mounting has the hydraulic stem in the pneumatic cylinder.

Preferably, the number of the limiting shells is two, four threaded rods are arranged on a single limiting shell, the four threaded rods are distributed on the limiting shell in an annular array mode, threaded holes matched with the threaded rods are formed in the limiting shell, and the threaded rods are installed in the threaded holes in a threaded mode.

Preferably, the number of the supporting seats is four, and the four supporting seats are distributed on the lower surface of the bottom plate in a rectangular array.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses steel hydrogen embrittlement test device is in the use, can peg graft respectively in two spacing casings with the test rod both ends of looking sideways at the breach, then the threaded rod rotates, the threaded rod is driven to move on spacing casing through the thread engagement between threaded rod and the spacing casing, thereby make the threaded rod support the surface at the test rod roof, fix the position of test rod in spacing casing, through the design of spring, when the test rod is located spacing casing, the spring can effectively reduce the activity stroke of test rod, avoid the device to rock by a wide margin before the test, then hang spacing casing on two hydraulic stems through the connecting rope, control the pneumatic cylinder work through external power supply, the hydraulic stem exerts stable pulling force to the work piece, make the hydraulic stem pulling spacing casing carry out hydrogen embrittlement detection, through a large amount of test descriptions, serious hydrogen embrittlement can fracture within a few minutes to several hours, sometimes, the steel wire is broken in tens of hours or tens of hours, which indicates that hydrogen embrittlement exists, but the steel wire is light, generally, the steel wire cannot be broken after tens of hours or hundreds of hours, the low hydrogen embrittlement is qualified, the structure is compact, the use is convenient, the tensile test is convenient to complete, the workpiece fixing step is simplified, the stability of the device is improved, and the use requirement of personnel is met.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic side view of the present invention;

fig. 3 is a schematic bottom view of the limiting shell and the threaded rod of the present invention;

fig. 4 is a schematic structural diagram of a in fig. 1 according to the present invention.

In the figure: 1. a base plate; 2. a hydraulic cylinder; 3. a supporting seat; 4. a hydraulic lever; 5. a test rod; 6. testing the notch; 7. connecting ropes; 8. a support bar; 9. closing the plate; 10. a top plate; 11. a limiting shell; 12. hanging a ring; 13. a mounting frame; 14. a spring; 15. a threaded rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, the present invention provides an embodiment: the utility model provides a steel hydrogen embrittlement test device, includes bottom plate 1, hydraulic stem 4, test bar 5, shrouding 9, spacing casing 11 and spring 14, and the welding of bottom plate 1's upper surface four corners position department has bracing piece 8, and the lower skin weld of bottom plate 1 has supporting seat 3, and supporting seat 3 totally four, and four supporting seats 3 are rectangular array distribution at the lower surface of bottom plate 1.

The lower surface of the sealing plate 9 is welded on the top end of the supporting rod 8, the middle position of the testing rod 5 is provided with a testing notch 6, two ends of the testing rod 5 are symmetrically welded with a top plate 10, the top plate 10 is movably inserted in the limiting shell 11, threaded rods 15 are arranged on the side equidistant threads of the limiting shell 11, the threaded rods 15 are contacted with the top plate 10, two ends of the testing rod 5 with the testing notch 6 can be respectively inserted in the two limiting shells 11, the number of the limiting shells 11 is two, four threaded rods 15 are arranged on a single limiting shell 11, the four threaded rods 15 are distributed on the limiting shell 11 in an annular array, threaded holes matched with the threaded rods 15 are arranged on the limiting shell 11, the threaded rods 15 are arranged in the threaded holes, then the threaded rods 15 are rotated, the threaded rods 15 are driven to move on the limiting shell 11 through the thread meshing action between the threaded, so that the threaded rod 15 is abutted against the surface of the top plate 10 of the test rod 5 to fix the position of the test rod 5 in the limit shell 11.

The outer surface of the limiting shell 11 is welded with a hanging ring 12, a connecting rope 7 is tied on the hanging ring 12 in a bolting mode, and one end, deviating from the hanging ring 12, of the connecting rope 7 is arranged on the hydraulic rod 4. The welding of the inner wall bottom of spacing casing 11 has mounting bracket 13, the lower surface welding of mounting bracket 13 has spring 14, mutual contact between spring 14's lower surface and the roof 10, the position of roof 10 is in between spring 14 and the threaded rod 15, and spring 14's original length is greater than spacing casing 11's the degree of depth, design through spring 14, when test bar 5 is located spacing casing 11, spring 14 can effectual reduction test bar 5's stroke, avoid the device to rock by a wide margin before the test, then hang spacing casing 11 through connecting rope 7 and establish on two hydraulic stems 4.

The upper surface of bottom plate 1 and the lower surface of shrouding 9 all install pneumatic cylinder 2 through the bolt, movable mounting has hydraulic stem 4 in the pneumatic cylinder 2, through external power supply control pneumatic cylinder 2 work, make hydraulic stem 4 pull spacing casing 11 and carry out the hydrogen embrittlement detection, exert stable pulling force, through a large amount of tests explanation, serious hydrogen embrittlement can be within a few minutes to several hours fracture, sometimes tens hours or tens hours also have the fracture, it has the hydrogen embrittlement to explain, but lighter, generally tens hours or hundreds of hours later, can not break basically, low hydrogen embrittlement is just qualified, compact structure, it is convenient to use, be convenient for accomplish tensile test, simplify the fixed step of work piece, the stability of the device is improved, personnel's user demand is satisfied.

The hydraulic cylinder 2 is T6C-017-2R00-C1 in model number, and has the advantages of small volume, long arm strength and the like.

The working principle is as follows: the utility model discloses a steel hydrogen embrittlement test device can be in the use, can peg graft respectively in two spacing casings 11 with test gap 6 test rod 5 both ends, then rotate threaded rod 15, through the screw-thread engagement effect between threaded rod 15 and the spacing casing 11 drive threaded rod 15 and move on spacing casing 11, thereby make threaded rod 15 support the surface at test rod 5 roof 10, fix the position of test rod 5 in spacing casing 11, through the design of spring 14, when test rod 5 is located spacing casing 11, spring 14 can effectively reduce the stroke of activity of test rod 5, avoid the device to rock by a wide margin before the test, then hang limit casing 11 on two hydraulic stems 4 through connecting rope 7, through external power supply control pneumatic cylinder 2 work, make hydraulic stem 4 stimulate spacing casing 11 to carry out the hydrogen embrittlement detection, explain through a large amount of tests, severe hydrogen embrittlement can be broken within minutes to hours, sometimes tens of hours or tens of hours, indicating hydrogen embrittlement, but is light, generally, the hydrogen embrittlement does not break basically after tens of hours or hundreds of hours, and low hydrogen embrittlement is qualified.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a steel hydrogen embrittlement test device, includes bottom plate (1), hydraulic stem (4), test rod (5), shrouding (9), spacing casing (11) and spring (14), its characterized in that: the welding of the upper surface four corners position department of bottom plate (1) has bracing piece (8), and the lower surface welding of bottom plate (1) has supporting seat (3), the lower surface welding of shrouding (9) is on the top of bracing piece (8), the intermediate position department of test bar (5) is equipped with test breach (6), and the both ends symmetrical welding of test bar (5) has roof (10), roof (10) activity is pegged graft in the inside of spacing casing (11), threaded rod (15) are installed to the avris equidistance screw thread of spacing casing (11), threaded rod (15) and roof (10) contact each other, the outer surface welding of spacing casing (11) has link (12), and the tether has connection rope (7) on link (12), and the one end that connection rope (7) deviate from link (12) is established on hydraulic stem (4).

2. A steel hydrogen embrittlement test apparatus according to claim 1, wherein: the welding of the inner wall bottom of spacing casing (11) has mounting bracket (13), and the lower surface welding of mounting bracket (13) has spring (14), and the lower surface of spring (14) and roof (10) contact each other.

3. A steel hydrogen embrittlement test apparatus according to claim 1, wherein: the top plate (10) is located between the spring (14) and the threaded rod (15), and the original length of the spring (14) is larger than the depth of the limiting shell (11).

4. A steel hydrogen embrittlement test apparatus according to claim 1, wherein: the upper surface of bottom plate (1) and the lower surface of shrouding (9) all install pneumatic cylinder (2) through the bolt, and movable mounting has hydraulic stem (4) in pneumatic cylinder (2).

5. A steel hydrogen embrittlement test apparatus according to claim 1, wherein: spacing casing (11) are totally two, are equipped with four threaded rods (15) on single spacing casing (11), and four threaded rods (15) are annular array and distribute on spacing casing (11), and are equipped with the screw hole with threaded rod (15) looks adaptation on spacing casing (11), and threaded rod (15) screw thread is installed in the screw hole.

6. A steel hydrogen embrittlement test apparatus according to claim 1, wherein: the number of the supporting seats (3) is four, and the four supporting seats (3) are distributed on the lower surface of the bottom plate (1) in a rectangular array.