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. Raw materials are heated to a molten state, kept warm to obtain material a; material a is taken out of the furnace for pouring, cooled to 450-480°C, and subjected to surface machine treatment to obtain material b; b warming up to T 1 ℃ for austenitization, keep it warm for 3-4 hours, take it out and place it in a nitrate bath with a temperature of 220-230 ℃, and raise the temperature to T 2 ℃, keep warm for 4~5h, air cool to 140~155℃, then heat up to T 3 ℃ for tempering, heat preservation t 3 h, air-cooled to room temperature to obtain impact-resistant wear-resistant pipe; where, T 1 980~1040, t 1 2~2.6, T 2 280-295, t 2 2.2~2.5, T 3 175-190, t 3 4.5~5, 3.4≤T 1 / T 2 ≤3.6, 0.66≤(T 2 ×t 2 ) / (T 3 ×t 3 )≤0.93, 0.45≤t 1 / t 3 ≤0.55.

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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