Application of HVOF Supersonic Spraying WC-10Co-4Cr in High Pressure Gate Valve（5）

       

(a) Porosity = 1.6% (b) Porosity = 1.4%

(a) Porosity = 1.6% (b) Porosity = 1.4%

（a）孔隙率= 1.6％（b）孔隙率= 1.4％

(A) Porosity = 1.6% (b) 1.4% Porosity =

（A）孔隙率= 1.6％（b）1.4％孔隙率=

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Figure 3 Porosity test of WC-10Co-4Cr coating

Figure 3 Porosity test of WC-10Co-4Cr coating

图3 WC-10Co-4Cr涂层的孔隙率测试

FIG 3 WC-10Co 4Cr-coating porosity test

图3 WC-10Co 4Cr涂层孔隙率测试

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Figure 4 Valve plate water pressure-resistant sealing experimental device

Figure 4 Valve plate water pressure-resistant sealing experimental device

图4阀板耐水密封实验装置

FIG 4 the valve plate sealing the water pressure resistance test apparatus

图4阀板密封耐水压试验装置

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3. Summary

3. Summary

3.总结

3, summary

3，总结

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Using HVOF spraying process, WC-10Co-4Cr powder spraying material, spraying and strengthening the working surface of the valve plate, the following conclusions are drawn:

Using HVOF spraying process, WC-10Co-4Cr powder spraying material, spraying and strengthening the working surface of the valve plate, the following conclusions are drawn:

采用HVOF喷涂工艺，WC-10Co-4Cr粉末喷涂材料，喷涂并加固阀板的工作表面，得出以下结论：

HVOF spraying using, WC-10Co-4Cr powder coating material is sprayed on the face of the valve plate reinforced, the following conclusions:

使用HVOF喷涂法，将WC-10Co-4Cr粉末涂料喷涂在增强的阀板表面上，得出以下结论：

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(1) The bonding strength of the coating reaches 72.63Mpa, and the bonding state between the coating and the substrate is good;

(1) The bonding strength of the coating reaches 72.63Mpa, and the bonding state between the coating and the substrate is good;

（1）涂层的结合强度达到72.63Mpa，涂层与基材之间的结合状态良好；

(1) the bonding strength reaches 72.63Mpa, a good state of bonding between the coating and the substrate;

（1）结合强度达到72.63Mpa，涂层与基材之间的结合状态良好；

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(2) The Vickers hardness value (HV0.3) of the coating is 1257.1, the micro hardness value of the coating is uniform, and the coating is dense and tough;

(2) The Vickers hardness value (HV0.3) of the coating is 1257.1, the micro hardness value of the coating is uniform, and the coating is dense and tough;

（2）涂层的维氏硬度值（HV0.3）为1257.1，涂层的显微硬度值均匀，涂层致密坚韧。

(2) Vickers hardness of coating layer (HV0.3) of 1257.1, micro-hardness coat layer uniform, coating density, good toughness;

（2）涂层的维氏硬度（HV0.3）为1257.1，涂层的显微硬度均匀，涂层密度大，韧性好；

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(3) The porosity of the coating is about 1.5%. Passing the 100Mpa water pressure test, there is no leakage on the working surface of the valve plate, indicating that the coating has good density, and the porosity level meets the working needs of high-pressure gate valves.

(3) The porosity of the coating is about 1.5%. Passing the 100Mpa water pressure test, there is no leakage on the working surface of the valve plate, indicating that the coating has good density, and the porosity level meets the working needs of high-pressure gate valves.

（3）涂层的孔隙率约为1.5％。通过100Mpa水压试验，阀板工作面无渗漏，表明涂层密度高，孔隙率可满足高压闸阀的工作需要。

(3) coating porosity of about 1.5%, by 100Mpa water pressure resistance test, the valve plate face leakage does not occur, indicating that induced good coating density, a high pressure valve to meet this level of porosity required work.

（3）涂层孔隙率约为1.5％，通过100Mpa耐水压试验，阀板表面不会发生渗漏，表明诱导的涂层密度良好，高压阀门可满足此孔隙率水平所需的工作。

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