Laser cladding method for improving abrasion resistance of mechanical seal sleeve for pump

A laser cladding and abrasion-resistant technology, which is applied in the coating, metal material coating process, etc., can solve the problems of non-wear resistance, acid and alkali corrosion resistance, and low hardness of the mechanical seal shaft sleeve, and achieve high temperature Oxidation and corrosion resistance, wear resistance improvement effect

Active Publication Date: 2014-08-13
HANGZHOU DAYE LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention proposes an abrasion-resistant laser cladding method for pump machine seal shaft sleeves, which solves the problems of low hardness, non-abrasion resistance, and acid and alkali corrosion resistance of the machine seal shaft sleeves in the prior art

Method used

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  • Laser cladding method for improving abrasion resistance of mechanical seal sleeve for pump

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of wear-resistant laser cladding method of mechanical seal shaft sleeve for pump (see figure 1 shown), including:

[0028] Step S1: surface treatment on the wear-resistant part of the shaft sleeve of the machine seal; specifically, unilateral cutting of the workpiece that needs to be modified by laser cladding to form grooves, the groove depth is 0.3-1.5mm; use acetone to clean the grooves , to remove oily impurities on the surface.

[0029] Step S2: Equipment 2000W high power semiconductor laser.

[0030] The wear-resistant parts after the surface treatment in step S1 are clad with nickel-based composite powder through a laser. The cladding adopts two layers of single-pass laser cladding layers, and helium is used to protect the molten pool during the cladding process; the output power The power is 1500W, the focal length is 160mm, the wavelength is 976nm, the powder feeding rate is 5g / min, the scanning speed is 12mm / s, and the melting temperature is 1080℃;

...

Embodiment 2

[0034] An abrasion-resistant laser cladding method for a shaft sleeve of a mechanical seal for a pump, comprising:

[0035] Step S1: Perform surface treatment on the wear-resistant part of the shaft sleeve of the machine seal; specifically, unilaterally cut the workpiece that needs to be modified by laser cladding to form a groove, the groove depth is 2-4mm; use acetone to clean the groove, Removes oily impurities from the surface.

[0036] Step S2: Equipment 2000W high power semiconductor laser.

[0037] The wear-resistant parts after the surface treatment in step S1 are clad with nickel-based composite powder through a laser. The cladding adopts 3 layers of single-pass laser cladding layers, and the thickness of the single-layer cladding layer is 0.1-1mm (the cladding thickness According to the scanning speed and powder feeding amount control), helium is used to protect the molten pool during the cladding process; the output power is 1800W, the focal length is 260mm, the wa...

Embodiment 3

[0041] The process of embodiment 3 is the same as embodiment 1, and its difference is as follows:

[0042] Process parameters in the cladding process: output power is 1600W, focal length is 200mm, wavelength is 976nm, powder feeding rate is 15g / min, scanning speed is 5mm / s, and melting temperature is 1060°C.

[0043] The chemical composition and mass percentage of the components of the nickel-based composite powder are as follows (the particle size of the nickel-based composite powder is: -150 / +280): C: 0.8%, Cr: 16%, Si: 4%, B: 4 %, Cu: 3%, Mo: 4%, Fe: 9%, CeO: 0.4%, Ti: 0.8%, W: 3%, and Ni: the balance;

[0044] Step S3: performing wet grinding on the shaft sleeve of the mechanical seal after cladding in step S2. Quality inspection: Carry out quality inspection on the mechanical seal shaft sleeve after cladding to confirm that the quality of the cladding parts meets the requirements for use.

[0045] The mechanical seal shaft sleeve for pumps in the present invention has a...

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Abstract

The invention provides a laser cladding method for improving the abrasion resistance of a mechanical seal sleeve for a pump. The laser cladding method comprises the following steps: carrying out surface treatment on an abrasion resistance part of the mechanical seal sleeve; carrying out fusion covering on the abrasion resistance part subjected to surface treatment by using nickel-based composite powder through a laser, wherein the nickel-based composite powder comprises the following chemical components in percentage by mass: 0.5-1% of C, 14-19% of Cr, 3.5-5% of Si, 3-4.5% of B, 2-4% of Cu, 2-4% of Mo, 8-9% of Fe, 0.3-0.5% of CeO, 0.5-1% of Ti, 2.5-3.5% of W and the balance of Ni; and carrying out wet-type grinding on the mechanical seal sleeve subjected to fusion covering, detecting and processing. After the mechanical seal sleeve for the pump is modified by laser cladding, the hardness of the mechanical seal sleeve for the pump can reach HRC (Rockwell hardness) 72-76, and the mechanical seal sleeve for the pump is anti-abrasive and meanwhile resists various chemical media.

Description

technical field [0001] The invention relates to the technical field of laser cladding, in particular to an abrasion-resistant laser cladding method for a pump mechanical seal shaft sleeve. Background technique [0002] Laser cladding technology is an interdisciplinary high-tech involving many disciplines such as optics, mechanics, electricity, computers, materials, physics, and chemistry. It was proposed in the 1960s, and the first patent on high-energy laser cladding was born in 1976. In the 1980s, laser cladding technology has developed rapidly, and the rapid prototyping technology combined with the rise of CAD technology has added new vitality to laser cladding technology. [0003] The main problems faced by the further application of laser cladding technology are: ① The main reason why laser cladding technology has not yet fully realized industrialization in China is the instability of cladding layer quality. During the laser cladding process, the heating and cooling s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05
Inventor 谢长国
Owner HANGZHOU DAYE LASER TECH
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