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Preparation method of impact resistant and wear resistant pipe

A technology of impact-resistant and wear-resistant pipes and materials, which is applied in the field of wear-resistant pipes and can solve problems such as insufficient wear-resistant and impact-resistant performance of pipes

Inactive Publication Date: 2016-07-06
ANHUI ZHENGSHI NEW BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wear-resistant and impact-resistant properties of the pipelines in the prior art are not enough and need to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing an impact-resistant and wear-resistant pipe proposed by the present invention comprises the following steps:

[0039] S1. The raw material is heated to a molten state in an argon atmosphere, and then vacuum-insulated to obtain a material a, wherein the material a includes by weight percentage: C: 0.8%, Si: 0.55%, V: 0.15%, W: 0.08%, Nb : 0.07%, Zr: 0.02%, Cr: 3.7%, Ti: 0.04%, Sc: 0.007%, Bi: 0.005%, B: 0.05%, La: 0.08%, S≤0.02%, P≤0.02%, Yu The amount is Fe;

[0040] S2. The material a is taken out of the furnace for pouring, cooled to 450° C., and subjected to surface machine treatment to obtain material b;

[0041] S3. Raise the temperature of material b to 1003°C for austenitization, keep it warm for 2.25h, take it out and put it in a nitrate bath with a temperature of 230°C, raise the temperature to 295°C, keep it warm for 2.2h, air cool to 140°C, and then heat up to Temper at 175°C, keep warm for 5 hours, and air cool to room temperature to...

Embodiment 2

[0043] A method for preparing an impact-resistant and wear-resistant pipe proposed by the present invention comprises the following steps:

[0044] S1. The raw material is heated to a molten state in an argon atmosphere, and then vacuum-insulated to obtain a material a, wherein the material a includes by weight percentage: C: 1.1%, Si: 0.45%, V: 0.25%, W: 0.05%, Nb : 0.10%, Zr: 0.01%, Cr: 4.0%, Ti: 0.03%, Sc: 0.010%, Bi: 0.002%, B: 0.08%, La: 0.05%, S≤0.02%, P≤0.02%, Yu The amount is Fe;

[0045] S2. The material a is taken out of the furnace for pouring, cooled to 480° C., and subjected to surface machine treatment to obtain material b;

[0046] S3. Raise the temperature of material b to 1008°C for austenitization, keep it warm for 2.47h, take it out and place it in a nitrate bath with a temperature of 220°C, raise the temperature to 280°C, keep it warm for 2.5h, air cool to 155°C, and then heat up to Temper at 190°C, keep warm for 4.5 hours, and air-cool to room temperatur...

Embodiment 3

[0048] A method for preparing an impact-resistant and wear-resistant pipe proposed by the present invention comprises the following steps:

[0049] S1. Raising the temperature of the raw materials to a molten state in an argon atmosphere, and then vacuum-insulating to obtain a material a, wherein the material a includes by weight percentage: C: 0.9%, Si: 0.52%, V: 0.17%, W: 0.07%, Nb : 0.08%, Zr: 0.017%, Cr: 3.8%, Ti: 0.038%, Sc: 0.008%, Bi: 0.004%, B: 0.06%, La: 0.07%, S≤0.02%, P≤0.02%, I The amount is Fe;

[0050] S2. The material a is taken out of the furnace for pouring, cooled to 460° C., and subjected to surface machine treatment to obtain material b;

[0051] S3. Raise the temperature of material b to 1005°C for austenitization, keep it warm for 2.36h, take it out and place it in a nitrate bath with a temperature of 228°C, raise the temperature to 290°C, keep it warm for 2.3h, air cool to 145°C, and then heat up to Tempering at 180°C, heat preservation for 4.9h, and a...

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Abstract

The invention discloses a preparation method of an impact resistant and wear resistant pipe. A raw material is heated to a molten state for insulation to obtain a material a; the material a is charged from a furnace for pouring, cooling to 450-480 DEG C and surface machining to obtain a material b; and the material b is heated to T1 DEG C for austenitizing and insulation by 3-4 h, is taken out to put in a nitrate bath with a temperature of 220-230 DEG C, is heated to T2 DEG C for insulation by 4-5 h, is cooled to 140-155 DEG C by air, is heated to T3 DEG C for tempering and insulation by t3 h, and is cooled to room temperature by air to obtain the impact resistant and wear resistant pipe, wherein T1 is 980-1040, t1 is 2-2.6, T2 is 280-295, t2 is 2.2-2.5, T3 is 175-190, t3 is 4.5-5, T1 / T2 is not more than 3.6 and not less than 3.4, (T2*t2) / (T3*t3) is not more than 0.93 and not less than 0.66, and t1 / t3 is not more than 0.55 and not less than 0.45.

Description

technical field [0001] The invention relates to the technical field of wear-resistant pipes, in particular to a preparation method for impact-resistant and wear-resistant pipes. Background technique [0002] In metallurgy, mining, electric power, petroleum, construction, coal and other industries, materials are conveyed through pipelines under pressure. Since the materials are lumpy or granular, the conveying pipes are subject to high pressure and severe wear. To ensure normal To carry out the work, the pipeline must have excellent properties of wear resistance and impact resistance. However, the wear-resistant and impact-resistant properties of the pipelines in the prior art are still insufficient and need to be improved. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes a method for preparing an impact-resistant and wear-resistant pipe. The obtained impact-resistant and wear-resistant pipe has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C38/12C22C38/14C22C38/02C21D9/08C21D1/20
CPCC22C38/18C21D9/085C21D2211/001C21D2211/002C22C38/002C22C38/005C22C38/02C22C38/12C22C38/14C22C38/32
Inventor 徐先锋胡正才
Owner ANHUI ZHENGSHI NEW BUILDING MATERIAL
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