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Preparation method for wear-resistant pipe long in service life

A technology of wear-resistant pipes and long service life, applied in the field of wear-resistant pipes, can solve the problems of insufficient wear-resistant and impact-resistant performance of pipes, and achieve the effects of excellent wear-resistant performance, reduced diffusion speed, and uniform grain refinement

Inactive Publication Date: 2016-07-20
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

[0032] A method for preparing a wear-resistant pipe with a long service life proposed by the present invention comprises the following steps:

[0033] S1. The raw material is heated to a molten state in an argon atmosphere, and then vacuum-insulated to obtain the first material, wherein the first material includes by weight percentage: C: 0.8%, Si: 0.55%, Mn: 0.2%, Ni: 0.15% , W: 0.05%, Nb: 0.18%, Zr: 0.03%, Cr: 4.0%, Ti: 0.7289%, Co: 0.04%, Mo: 0.16%, B: 0.09%, Ce: 0.18%, S≤0.02% , P≤0.02%, the balance is Fe;

[0034] S2. The first material is taken out of the furnace for pouring, cooled to 375° C., and subjected to surface machine treatment to obtain the second material;

[0035] S3. Raise the temperature of the second material to 1075°C for austenitization, then keep it warm for 2.8 hours, take it out and place it in a nitrate bath with a temperature of 220°C, raise the temperature to 300°C, keep it warm for 1.5h, and cool it by air to 100°C, then Heat up to 200°C for tem...

Embodiment 2

[0037] A method for preparing a wear-resistant pipe with a long service life proposed by the present invention comprises the following steps:

[0038] S1. The raw material is heated to a molten state in an argon atmosphere, and then vacuum-insulated to obtain the first material, wherein the first material includes by weight percentage: C: 1.1%, Si: 0.45%, Mn: 0.3%, Ni: 0.12% , W: 0.08%, Nb: 0.15%, Zr: 0.06%, Cr: 3.6%, Ti: 0.7196%, Co: 0.07%, Mo: 0.13%, B: 0.12%, Ce: 0.15%, S≤0.02% , P≤0.02%, the balance is Fe;

[0039] S2. The first material is taken out of the furnace for pouring, cooled to 395° C., and subjected to surface machine treatment to obtain the second material;

[0040] S3. Raise the temperature of the second material to 1065°C for austenitization, then keep it warm for 3 hours, take it out and put it in a nitrate bath with a temperature of 200°C, raise the temperature to 330°C, keep it warm for 1 hour, air cool to 120°C, and then heat up to Tempering at 220°C, h...

Embodiment 3

[0042] A method for preparing a wear-resistant pipe with a long service life proposed by the present invention comprises the following steps:

[0043] S1. The raw material is heated to a molten state in an argon atmosphere, and then vacuum-insulated to obtain the first material, wherein the first material includes by weight percentage: C: 0.9%, Si: 0.52%, Mn: 0.25%, Ni: 0.14% , W: 0.06%, Nb: 0.17%, Zr: 0.04%, Cr: 3.9%, Ti: 0.7256%, Co: 0.05%, Mo: 0.15%, B: 0.10%, Ce: 0.17%, S≤0.02% , P≤0.02%, the balance is Fe;

[0044] S2. The first material is taken out of the furnace for pouring, cooled to 380° C., and subjected to surface machine treatment to obtain the second material;

[0045] S3. Raise the temperature of the second material to 1070°C for austenitization, then keep it warm for 3 hours, take it out and put it in a nitrate bath with a temperature of 215°C, raise the temperature to 310°C, keep it warm for 1.3h, air cool to 105°C, and then raise the temperature Tempering a...

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Abstract

The invention discloses a preparation method for a wear-resistant pipe long in service life. The preparation method includes the steps that the temperature of raw materials is raised, and heat preservation is conducted to obtain a first material; pouring and cooling are conducted on the first material, and surface machine processing is conducted to obtain a second material; the temperature of the second material is raised to TA DEG C for austenitizing, then heat preservation is conducted for tA h, the second material is taken out and put in a nitrate bath, the temperature is raised to TB DEG C, heat preservation is conducted for tB h, air cooling is conducted till the temperature is 100 DEG C to 120 DEG C, the temperature continues to rise to TC DEG C for tempering, heat preservation is conducted for tC h, and air cooling is conducted till the temperature is the room temperature to obtain the wear-resistant pipe long in service life; TA ranges from 1050 to 1100, tA ranges from 2.6 to 3.2, TB ranges from 300 to 330, tB ranges from 1 to 1.5, TC ranges from 200 to 220, and tC ranges from 3 to 4; and TA, tA, TB, tB, TC and tC conform to the following relations that TB / K1=TA-955, TAxtA=K2xTBxtB+TCxtC, the value of K1 ranges from 2.5 to 3, and the value of K2 ranges from 4 to 9.

Description

technical field [0001] The invention relates to the technical field of wear-resistant pipes, in particular to a preparation method of wear-resistant pipes with long service life. 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 existing in the background technology, the present invention proposes a preparation method for a wear-resistant pipe with a long service life. The obtained wear-resistant pipe has excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/10C22C38/08C22C38/12C22C38/14C22C38/32C21D1/20C21D6/00
CPCC22C38/02C21D1/20C21D6/004C21D6/005C21D6/007C21D6/008C21D2211/002C22C38/005C22C38/04C22C38/105C22C38/12C22C38/14C22C38/32
Inventor 徐先锋胡正才
Owner ANHUI ZHENGSHI NEW BUILDING MATERIAL