CN216306046U - High-temperature-resistant and wear-resistant valve seat ring - Google Patents
High-temperature-resistant and wear-resistant valve seat ring Download PDFInfo
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- CN216306046U CN216306046U CN202123117649.6U CN202123117649U CN216306046U CN 216306046 U CN216306046 U CN 216306046U CN 202123117649 U CN202123117649 U CN 202123117649U CN 216306046 U CN216306046 U CN 216306046U
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- valve seat
- resistant
- cast iron
- seat ring
- wear
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Abstract
The utility model relates to a high-temperature-resistant and wear-resistant valve seat ring which comprises a cylindrical hollow vermicular graphite cast iron base material. And a laser cladding area is arranged on the matching surface of the inner wall of the vermicular cast iron base material and the air valve, and a cobalt-based alloy cladding material is arranged on the laser cladding area. The valve retainer has good performance, can obviously reduce the abrasion of the valve retainer, improves the safe reliability and the service life of the valve retainer of the engine, and is suitable for improving the performance of a power system of a high-power diesel engine.
Description
Technical Field
The utility model relates to a valve seat ring for a diesel engine, in particular to a high-temperature-resistant and wear-resistant valve seat ring.
Background
In the working process of a high-power diesel engine, a pair of friction pairs is formed by a valve seat ring and a valve, and the valve seat ring and the valve are subjected to complex working conditions such as high temperature, high impact load, gas corrosion and the like, so that the problems of hardness reduction, corrosion, abrasion and the like of a valve seat ring material are easily caused, the abrasion loss of the valve seat ring is increased, the valve clearance is insufficient, the gas sealing is invalid, and the performance improvement of an engine power system is influenced.
In order to improve the safety reliability and the service life of the valve seat ring of the engine, the valve seat ring meets the following performance requirements: 1) good high-temperature mechanical properties; 2) good high-temperature gas scouring and corrosion resistance; 3) the wear resistance of the valve matching pair is good. At present, the adoption of laser cladding technology to manufacture high-performance valve seat ring materials is an inevitable trend of engine technical development, so that the design and manufacture of novel valve seat ring members to meet the requirements of complex working conditions of high-power diesel engines are necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-temperature-resistant and wear-resistant valve seat ring with good performance.
In order to solve the problems, the utility model provides a high-temperature-resistant wear-resistant valve seat ring, which is characterized in that: the valve seat ring comprises a cylindrical and hollow vermicular graphite cast iron base material; and a laser cladding area is arranged on the matching surface of the inner wall of the vermicular cast iron base material and the air valve, and a cobalt-based alloy cladding material is arranged on the laser cladding area.
The diameter of the vermicular graphite cast iron base material is 40-60 mm, and the wall thickness is 8-12 mm.
The thickness of the cobalt-based alloy cladding material is 1.2-1.8 mm.
Compared with the prior art, the utility model has the following advantages:
1. according to the utility model, the matching surface of the inner wall of the vermicular cast iron base material and the valve is provided with the laser cladding area, and the laser cladding area is provided with the cobalt-based alloy cladding material, so that the cobalt-based alloy cladding material and the vermicular cast iron base material are metallurgically bonded, and further the vermicular cast iron base material has excellent high-temperature resistance, oxidation resistance and wear resistance.
2. The valve seat ring of the utility model is matched with a nickel-chromium alloy valve, and the abrasion loss is measured after a 100h bench testLess than or equal to 0.02 mm; according to the test of GJB323A-1996, the mass ablation rate of the utility model is less than or equal to 1 x 10 after the circulation of 2000 times at 800 ℃ for 30min + boiling water for 3min-3g/s. And the wear loss of the vermicular cast iron valve seat ring subjected to surface quenching treatment is more than 0.03mm after a 100-hour bench test. Therefore, the valve retainer can obviously reduce the abrasion of the valve retainer, improve the safety reliability and the service life of the valve retainer of the engine, and is suitable for improving the performance of a power system of a high-power diesel engine.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic representation of a vermicular cast iron billet according to the present invention.
Fig. 3 is a cross-sectional view of the present invention.
In the figure: 1-a vermicular cast iron substrate; 2-cobalt-based alloy cladding material; 3-laser cladding area.
Detailed Description
As shown in fig. 1 to 3, the high temperature resistant and wear resistant valve seat insert comprises a cylindrical and hollow vermicular cast iron base material 1. The laser cladding area 3 is arranged on the matching surface of the inner wall of the vermicular cast iron base material 1 and the air valve, and the cobalt-based alloy cladding material 2 is arranged on the laser cladding area 3.
Wherein: the diameter of the vermicular cast iron base material 1 is 40-60 mm, and the wall thickness is 8-12 mm.
The thickness of the cobalt-based alloy cladding material is 1.2-1.8 mm.
The manufacturing steps of the high-temperature-resistant wear-resistant valve seat ring are as follows:
firstly, processing a vermicular cast iron round bar into a blank piece according to a schematic diagram shown in fig. 2, and obtaining the vermicular cast iron base material 1.
Secondly, forming the cobalt-based alloy cladding material 2 on the vermicular graphite cast iron substrate 1 in a laser cladding area 3 shown in fig. 2 by adopting a laser cladding technology, and performing metallurgical bonding. At the moment, the cobalt-based alloy cladding material 2 is positioned on the matching surface of the valve and the valve seat ring.
Thirdly, machining to the structure shown in the figure 3, and ensuring the sizes of the cobalt-based alloy cladding material 2 and the valve seat ring.
Claims (3)
1. The utility model provides a high temperature resistant wear and tear valve seat circle which characterized in that: the valve seat ring comprises a cylindrical and hollow vermicular graphite cast iron base material (1); the laser cladding area (3) is arranged on the matching surface of the inner wall of the vermicular cast iron base material (1) and the air valve, and a cobalt-based alloy cladding material (2) is arranged on the laser cladding area (3).
2. A high temperature and wear resistant valve seat insert as claimed in claim 1, wherein: the diameter of the vermicular graphite cast iron base material (1) is 40-60 mm, and the wall thickness is 8-12 mm.
3. A high temperature and wear resistant valve seat insert as claimed in claim 1, wherein: the thickness of the cobalt-based alloy cladding material (2) is 1.2-1.8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123117649.6U CN216306046U (en) | 2021-12-13 | 2021-12-13 | High-temperature-resistant and wear-resistant valve seat ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123117649.6U CN216306046U (en) | 2021-12-13 | 2021-12-13 | High-temperature-resistant and wear-resistant valve seat ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216306046U true CN216306046U (en) | 2022-04-15 |
Family
ID=81084557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123117649.6U Active CN216306046U (en) | 2021-12-13 | 2021-12-13 | High-temperature-resistant and wear-resistant valve seat ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216306046U (en) |
-
2021
- 2021-12-13 CN CN202123117649.6U patent/CN216306046U/en active Active
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