Valve retainer and preparation process thereof

A valve seat ring and preparation process technology, applied in manufacturing tools, metal material coating process, mechanical equipment and other directions, can solve the problem of aggravating impact wear, adhesive wear and corrosion wear, aggravating valve seat wear degree, poor wear resistance, etc. problems, to achieve the effect of increasing wear resistance and corrosion resistance, improving engine reliability, and improving mechanical properties

A valve seat ring and preparation process technology, applied in manufacturing tools, metal material coating process, mechanical equipment and other directions, can solve the problem of aggravating impact wear, adhesive wear and corrosion wear, aggravating valve seat wear degree, poor wear resistance, etc. problems, to achieve the effect of increasing wear resistance and corrosion resistance, improving engine reliability, and improving mechanical properties

CN108588577AActive Publication Date: 2018-09-28WEICHAI POWER CO LTD +1
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  • Valve retainer and preparation process thereof
  • Valve retainer and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In the present embodiment, the material composition (wt%) for preparing the valve seat ring is shown in Table 1 below:

[0042] Table 1

[0043]

[0044] The valve seat was prepared according to the above material composition and the valve seat preparation process, and related performance tests were carried out on the valve seat: after surface treatment, a density test was first performed, and the test showed that the valve seat The density is 7.85g / cm 3 Then adopt the Rockwell hardness method to carry out the hardness test, the test shows that the hardness of the upper seat ring 1 of the valve seat ring is 46HRC; then adopt the Vickers hardness method to carry out the hardness test, the test shows that the surface hardness of the valve seat ring is 830HV. .2; Finally, a ball mill type friction and wear testing machine is used to carry out a friction test, and the test shows that the coefficient of friction of the valve seat ring is 0.15.

Embodiment 2

[0046] In the present embodiment, the material composition (wt%) for preparing the valve seat ring is shown in Table 2 below:

[0047] Table 2

[0048]

[0049] Prepare the valve seat according to the material composition shown in Table 2 and the valve seat preparation process, and carry out relevant performance tests on the valve seat: after surface treatment, first carry out density test, the test shows The density of the valve seat ring is 8.04g / cm 3 Then adopt the Rockwell hardness method to carry out the hardness test, the test shows that the hardness of the upper seat ring 1 of the valve seat ring is 48HRC; then adopt the Vickers hardness method to carry out the hardness test, the test shows that the surface hardness of the valve seat ring is 854HV. .2; finally adopt the ball mill type friction and wear testing machine to carry out the friction test, the test shows that the friction coefficient of the valve seat ring is 0.12.

Embodiment 3

[0051] In the present embodiment, the material composition (wt%) of preparing valve seat is as shown in table 3 below:

[0052] table 3

[0053]

C

Si

mn

S

co

Cr

Mo

V

Cu

Fe

upper layer

1.1

0.5

2.0

1.0

4.0

7.0

7.5

3.0

20.0

margin

lower level

0.9

1.0

1.1

22.0

margin

[0054] The valve seat was prepared according to the above material composition and the valve seat preparation process, and related performance tests were carried out on the valve seat: after surface treatment, a density test was first performed, and the test showed that the valve seat The density is 8.18g / cm 3 Then adopt the Rockwell hardness method to carry out the hardness test, the test shows that the hardness of the upper seat ring 1 of the valve seat ring is 51HRC; then adopt the Vickers hardness method to carry out the hardness test, the test shows that the surface hardness of the...

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Abstract

The invention provides a valve retainer and a preparation process thereof. The preparation process comprises the following steps of: preparing powder, wherein the powder comprises high alloy layer powder and low alloy layer powder; carrying out compression moulding and sintering on the powder to prepare a valve retainer; carrying out cold treatment, heat treatment, cleaning and drying on the prepared valve retainer; carrying out deposition on a base surface of the valve retainer by adoption of a cathode arc deposition technology and magnetron sputtering technology combined manner so as to forma transition layer and a DLC coating; and finally annealing the valve retainer. By adoption of the preparation process, the valve retainer has relatively high heat stability, relatively high corrosion resistance and relatively low friction coefficient, so that the wear resistance, service life and system reliability of the valve retainer are effectively improved.

Description

technical field [0001] The invention mainly relates to a method for preparing engine cylinder head accessories, in particular to a valve seat ring and a preparation process thereof. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] The valve seat ring is located at the part where the cylinder head is combined with the valve cone surface. There is a corresponding cone surface. With continuous improvement, the high-speed impact and working stress between the valve and the valve seat ring are increasing, and the impact wear on the valve seat ring is becoming more and more serious. In addition, the valve seat ring in the prior art is often There are adhesive wear and corrosion wear. The so-called adhesive wear, also known as occlusal wear, refers to the local occurrence of metal adhesion on the contact surface of the friction pair during sliding friction, and the adhesion ...

Claims

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Application Information

Patent Timeline
28 Sep 2018
Publication
CN108588577A
IPC
C22C38/20; B22F7/02; C21D1/26; C21D9/00; C22C38/02; C22C38/04; C22C38/22; C22C38/24; C22C38/30; C22C38/38; C22C38/60; C23C14/06; C23C14/16; C23C14/32; C23C14/35; F01L3/02; F02F11/00
CPC
B22F7/02; C21D1/26; C21D9/0068; C22C38/02; C22C38/04; C22C38/20; C22C38/22; C22C38/24
Inventors
辛延君; 姜爱龙