Preparation method of nodular cast iron-bronze composite material for cylinder body of plunger pump

A technology of ductile iron and composite materials, which is applied in the field of preparation of ductile iron-bronze composite materials, can solve the problems of large interface bonding strength and small thermal stress gradient, and achieve the effect of improving the interface bonding strength

Inactive Publication Date: 2011-09-14
无锡市汉力士液压泵制品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the two problems that the solid solubility between copper and iron is small and the thermal stress gradient is large in

Method used

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  • Preparation method of nodular cast iron-bronze composite material for cylinder body of plunger pump
  • Preparation method of nodular cast iron-bronze composite material for cylinder body of plunger pump
  • Preparation method of nodular cast iron-bronze composite material for cylinder body of plunger pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, a method for preparing a nodular cast iron-bronze composite material for a plunger pump cylinder, the manufacturing steps are:

[0027] Ductile iron surface treatment

[0028] First, use water sandpaper to polish the surface of graphite cast iron, then pickle with 10% H2SO4 and 2% HF mixture for 30 seconds, rinse with hot water for 15 minutes, then wash with 5% NaOH solution for 30 minutes, and then rinse with hot water for 15 minutes. Minutes to remove rust and oil on the surface of ductile iron as much as possible.

[0029] Ductile iron electroplated nickel

[0030] The electroplating solution was prepared with nickel sulfate as the main salt. The composition of the plating solution was NiSO4·6H2O: 330 g / l, NiCl·6H2O: 45 g / l, H3BO3: 37 g / l, H2O2: 0.5 ml / l, and placed in a water bath Heating to about 60°C, then using high-purity graphite rod as anode and ductile iron as cathode, control the current density at about 5A / dm2 for 10 minutes, and the t...

Embodiment 2

[0037] Embodiment 2, a method for preparing a nodular cast iron-bronze composite material for a plunger pump cylinder, the manufacturing steps are:

[0038] Ductile iron surface treatment

[0039] First, use water sandpaper to polish the surface of graphite cast iron, then pickle with 10% H2SO4 and 2% HF mixture for 30 seconds, rinse with hot water for 15 minutes, then wash with 5% NaOH solution for 30 minutes, and then rinse with hot water for 15 minutes. Minutes to remove rust and oil on the surface of ductile iron as much as possible.

[0040] Ductile iron electroplated nickel

[0041] Prepare the electroplating solution with nickel sulfamate as the main salt. The components of the plating solution are Ni(NH2SO3)2: 340 g / l, NiCl2 6H2O: 40 g / l, H3BO3: 40 g / l, C12H25SO4Na: 0.1g / l, And heat it to about 50°C in a water bath, then use the nickel plate as the anode and the ductile iron as the cathode, and control the current density at about 5A / dm2 for 20 minutes, and the...

Embodiment 3

[0048] Embodiment 3, a method for preparing a nodular cast iron-bronze composite material for a plunger pump cylinder, the manufacturing steps are:

[0049] Ductile iron surface treatment

[0050] First, use water sandpaper to polish the surface of graphite cast iron, then pickle with 10% H2SO4 and 2% HF mixture for 30 seconds, rinse with hot water for 15 minutes, then wash with 5% NaOH solution for 30 minutes, and then rinse with hot water for 15 minutes. Minutes to remove rust and oil on the surface of ductile iron as much as possible.

[0051] Ductile iron electroplated nickel

[0052] Prepare the electroplating solution with nickel chloride as the main salt. The composition of the plating solution is NiCl2 6H2O: 300 g / l, H3BO3: 30 g / l, NaCl: 10 g / l, C12H25SO4Na: 0.1g / l, and in a water bath Heat to about 70°C, then use the nickel plate as the anode and the ductile iron as the cathode, control the current density to about 5A / dm2 for 50 minutes, and the thickness of t...

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Abstract

The invention relates to a preparation method of a nodular cast iron-bronze composite material for a cylinder body of a plunger pump, relating to a preparation method of a metal composite material. The preparation method comprises the following steps of: plating a nickel layer on the surface of a nodular cast iron through a plating method, and then pressing a powdery bronze layer on the surface of the nickel-plated surface of the nodular cast iron to obtain a composite blank; and sintering the composite blank in a reducing or neutral atmosphere to obtain a sintered composite material. The invention effectively solves the problems of lower solid solubility between the nodular cast iron and bronze, higher heat stress gradient during cooling, and the like, thereby greatly enhancing the combining performance of an interface of the composite material.

Description

technical field [0001] The invention relates to a method for preparing a metal composite material, in particular to a method for preparing a nodular cast iron-bronze composite material used for a cylinder body of a plunger pump. Background technique [0002] Piston pump is an indispensable and important part of hydraulic machinery in construction, metallurgy, petroleum, shipbuilding, mining, military industry and other fields. As the plunger pump cylinder material, steel or cast iron and bronze composite materials are usually used. Patent [91109101, Zhou Tietao, Li Haizhi, Zhou Weiyang, Wang Yihu. Cast iron-copper bimetallic composite material sintering process] A sintering process for preparing cast iron-copper alloy composite material is introduced. In this process, a thin layer of copper powder is evenly spread on the surface of the cast iron substrate, and placed in the sintering furnace for the first diffusion sintering to make the copper and iron diffuse and bond to ...

Claims

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Application Information

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IPC IPC(8): B22F7/04C25D3/12
Inventor 李海王芝秀孙晓浩刘琴
Owner 无锡市汉力士液压泵制品有限公司
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