A kind of hardenability measurement component and measurement method of medium and low hardenability steel

Abstract

The invention relates to a measuring component and a measuring method for the hardenability of steel with medium and low hardenability, and belongs to the technical field of hardenability testing of metal materials. In the present invention, the hardenability measurement component of low hardenability steel includes a base, a bracket, a liquid inlet pipe, a liquid inlet valve, a liquid storage tank, a test sample, a quenching liquid, a liquid discharge pipe, a liquid discharge valve, and the liquid storage tank is fixedly arranged. On the base, the top side end of the liquid storage tank is provided with a liquid inlet pipe communicating with the cavity of the liquid storage tank, the quenching liquid is arranged in the liquid storage tank, and the bottom end of the liquid storage tank is provided with a pipe connected with the cavity of the liquid storage tank. The liquid discharge pipe is provided with a liquid discharge valve, and the support is fixed horizontally on the inner wall of the lower part of the liquid storage tank; the test sample is arranged on the support; the test sample is a unequal diameter cone structure. The present invention solves the technical problem of a large amount of samples by setting the test sample as an unequal-diameter cone structure, and conducts the same experiment in the same hardenability measuring device for medium and low hardenability steel to ensure that the sample The quenching conditions are the same.

Description

technical field

[0001] The invention relates to a measuring component and a measuring method for the hardenability of medium and low hardenability steel materials, and belongs to the technical field of hardenability testing of metal materials. Background technique

[0002] The hardenability of steel refers to the ability of the steel to obtain an effective hardening depth after austenitization. Generally, the depth from the quenching end to the semi-martensitic zone is defined as the depth of the effective hardening layer. Understanding the hardenability of steel is of great significance for selecting the appropriate steel for the workpiece and determining a reasonable heat treatment process for the part.

[0003] The critical hardening diameter method is a method for measuring the hardenability of materials. The critical hardening diameter method refers to the maximum diameter of the round bar sample quenched in a quenching liquid, and the center of the cross section is que...

Examples

Embodiment 1

[0036] Example 1: from Figure 1~3 As shown, a medium-low hardenability steel hardenability measurement component includes a base 1, a bracket 2, a liquid inlet pipe 3, a liquid inlet valve 4, a liquid storage tank 5, a test sample 6, a quenching liquid 7, and a drain Pipe 8, drain valve 9,

[0037] The liquid storage tank 5 is fixedly arranged on the base 1, and the top side end of the liquid storage tank 5 is provided with a liquid inlet pipe 3 communicating with the cavity of the liquid storage tank 5, and the quenching liquid 7 is arranged in the liquid storage tank 5, and the liquid storage tank 5 The bottom end of the bottom is provided with a liquid discharge pipe 8 communicating with the cavity of the liquid storage tank 5, the liquid discharge pipe 8 is provided with a liquid discharge valve 9, and the bracket 2 is fixed horizontally on the inner wall of the lower part of the liquid storage tank 5;

[0038] The test sample 6 is set on the support 2;

[0039] Test sa...

Embodiment 2

[0051] Embodiment 2: This embodiment adopts the method for measuring the hardenability of the medium and low hardenability steel by the low hardenability steel hardenability measuring member in Embodiment 1, and the specific steps are as follows:

[0052] (1) The test sample of SA508-3 steel, which is a large nuclear power forging, is processed into an unequal diameter cone structure (see image 3 ), where the major diameter is Φ30mm, the minor diameter is Φ20mm, and the length is 100mm;

[0053] (2) Put the SA508-3 steel test sample with unequal diameter cone structure into a heat treatment furnace and heat it up to 900°C for 30 minutes, and keep it at 900°C for 30 minutes to make the sample completely austenitized. The heating process is as follows: Figure 5 shown;

[0054] (3) Fix the bracket horizontally on the inner wall of the liquid storage tank, open the liquid inlet valve of the liquid inlet pipe, and add the quenching liquid (water) into the liquid storage tank unt...

Embodiment 3

[0061] Embodiment 3: This embodiment adopts the method for measuring the hardenability of the medium and low hardenability steel by the low hardenability steel hardenability measuring member in Embodiment 1, and the specific steps are as follows:

[0062] (1) The test sample of SA508-3 steel, which is a large nuclear power forging, is processed into an unequal diameter cone structure (see image 3 ), where the major diameter is Φ30mm, the minor diameter is Φ20mm, and the length is 100mm;

[0063] (2) Put the SA508-3 steel test sample with unequal diameter cone structure into a heat treatment furnace and heat it up to 900°C for 30 minutes, and keep it at 900°C for 30 minutes to make the sample completely austenitized. The heating process is as follows: Figure 5 shown;

[0064] (3) Fix the bracket horizontally on the inner wall of the liquid storage tank, open the liquid inlet valve of the liquid inlet pipe, and add the quenching liquid (oil) into the liquid storage tank until...

technical field

[0001] The invention relates to a measuring component and a measuring method for the hardenability of medium and low hardenability steel materials, and belongs to the technical field of hardenability testing of metal materials. Background technique

[0002] The hardenability of steel refers to the ability of the steel to obtain an effective hardening depth after austenitization. Generally, the depth from the quenching end to the semi-martensitic zone is defined as the depth of the effective hardening layer. Understanding the hardenability of steel is of great significance for selecting the appropriate steel for the workpiece and determining a reasonable heat treatment process for the part.

[0003] The critical hardening diameter method is a method for measuring the hardenability of materials. The critical hardening diameter method refers to the maximum diameter of the round bar sample quenched in a quenching liquid, and the center of the cross section is que...

Examples

Embodiment 1

[0036] Example 1: from Figure 1~3 As shown, a medium-low hardenability steel hardenability measurement component includes a base 1, a bracket 2, a liquid inlet pipe 3, a liquid inlet valve 4, a liquid storage tank 5, a test sample 6, a quenching liquid 7, and a drain Pipe 8, drain valve 9,

[0037] The liquid storage tank 5 is fixedly arranged on the base 1, and the top side end of the liquid storage tank 5 is provided with a liquid inlet pipe 3 communicating with the cavity of the liquid storage tank 5, and the quenching liquid 7 is arranged in the liquid storage tank 5, and the liquid storage tank 5 The bottom end of the bottom is provided with a liquid discharge pipe 8 communicating with the cavity of the liquid storage tank 5, the liquid discharge pipe 8 is provided with a liquid discharge valve 9, and the bracket 2 is fixed horizontally on the inner wall of the lower part of the liquid storage tank 5;

[0038] The test sample 6 is set on the support 2;

[0039] Test sa...

Embodiment 2

[0051] Embodiment 2: This embodiment adopts the method for measuring the hardenability of the medium and low hardenability steel by the low hardenability steel hardenability measuring member in Embodiment 1, and the specific steps are as follows:

[0052] (1) The test sample of SA508-3 steel, which is a large nuclear power forging, is processed into an unequal diameter cone structure (see image 3 ), where the major diameter is Φ30mm, the minor diameter is Φ20mm, and the length is 100mm;

[0053] (2) Put the SA508-3 steel test sample with unequal diameter cone structure into a heat treatment furnace and heat it up to 900°C for 30 minutes, and keep it at 900°C for 30 minutes to make the sample completely austenitized. The heating process is as follows: Figure 5 shown;

[0054] (3) Fix the bracket horizontally on the inner wall of the liquid storage tank, open the liquid inlet valve of the liquid inlet pipe, and add the quenching liquid (water) into the liquid storage tank unt...

Embodiment 3

[0061] Embodiment 3: This embodiment adopts the method for measuring the hardenability of the medium and low hardenability steel by the low hardenability steel hardenability measuring member in Embodiment 1, and the specific steps are as follows:

[0062] (1) The test sample of SA508-3 steel, which is a large nuclear power forging, is processed into an unequal diameter cone structure (see image 3 ), where the major diameter is Φ30mm, the minor diameter is Φ20mm, and the length is 100mm;

[0063] (2) Put the SA508-3 steel test sample with unequal diameter cone structure into a heat treatment furnace and heat it up to 900°C for 30 minutes, and keep it at 900°C for 30 minutes to make the sample completely austenitized. The heating process is as follows: Figure 5 shown;

[0064] (3) Fix the bracket horizontally on the inner wall of the liquid storage tank, open the liquid inlet valve of the liquid inlet pipe, and add the quenching liquid (oil) into the liquid storage tank until...

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