Method for manufacturing wear-resistant metal piece

A manufacturing method and technology of wear-resistant parts, applied in the direction of manufacturing tools, metal processing equipment, welding equipment, etc., can solve the problems of complex process, poor strength, poor wear resistance, etc., and achieve simple and reasonable process, improved service life, wear-resistant good performance

Inactive Publication Date: 2011-01-12
HUNAN DEUSINO WEAR RESISTANT IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wear-resistant integral casting is currently the main way to solve the wear-resistant thickness. Then, there are contradictory problems in performance selection in the manufacture of cast wear-resistant parts. Casting materials with good wear resistance have high hardness, poor quenching strength, and impact and extrusion resistance. Weak, if you choose a material with strong impact resistance, the wear resistance will decrease. The high manganese steel hammer head is the representative of cast wear-resistant parts. It is widely used in the crushing of mine materials, but its wear resistance is poor and it needs to be replaced frequently.
Wear-resistant composite casting is a new type of manufacturing method for wear-resistant parts. There are two methods. One is a wear-resistant part that is cast with a steel matrix as the core and covered with a layer of wear-resistant material. It is an effective way to improve wear resistance. , wear-resistant parts with good strength, but their wear resistance and thickness are limited, and because the combination of wear-resistant casting body and steel core directly affects the quality of wear-resistant parts, the process is complicated, and it is difficult to achieve a good combination by itself. It is difficult to increase the wear resistance and impact resistance greatly; the other is to combine sintered or cast hard blocks and rods into a core, and wrap and cast with steel materials, or because of the combination of the two materials, it is easy to peel off
It is a very good way to solve the comprehensive performance of impact resistance and wear resistance of the surface. This method has the limitation of super-thickness of surfacing welding and stress concentration. Larger problem, in the conditions of strong impact resistance and thermal expansion and contraction, it is easy to cause the separation and peeling of the grid steel bar and the surfacing material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: High-pressure extrusion roll of a roll press with a diameter of 1600 mm

[0018] Making the body: the body material of the high-pressure extrusion roller is 42CrMo, which is made by the prior art method.

[0019] Making blind holes: Drill 162 blind holes staggeredly on the outer circumference of the body. The diameter of the blind hole is 22.5mm, the hole depth is 25mm, and the center distance between adjacent blind holes is 31mm.

[0020] Overlay welding filling: filling wear-resistant welding consumables in the form of overlay welding. In this embodiment, two different wear-resistant welding materials are used. First use the ZD-155 wear-resistant material produced by Zhongde Company to fill the holes, and its hardness is HRC55-58. Then use the ZD-160 wear-resistant material produced by Zhongde Company to fully weld along the gap between the holes, and its hardness is HRC60-62. Form a pattern with a thickness of 5 mm.

[0021] Annealing: optional. The ...

Embodiment 2

[0022] Embodiment 2: The crushing roller of the cone crusher of PYZ1200 model

[0023] Manufacture of the body: The material of the crushing roller body is 30CrMo, which is manufactured by the prior art method.

[0024] Making blind holes: Divide the crushing roller into three sections: left, middle and right, among which the middle section is the easiest to wear. The diameter of the blind holes is 30mm, the blind holes are arranged in a staggered manner, the center distance between adjacent blind holes is 39-42mm, the depth of the blind holes in the middle section is 50mm, and the depth of the blind holes at the left and right ends is 30mm.

[0025] Overlay welding filling: filling wear-resistant welding consumables in the form of overlay welding. In this embodiment, the same kind of wear-resistant welding material is used for surfacing welding twice. Wear-resistant welding material ZD-160 wear-resistant material produced by Zhongde Company, its hardness is HRC60-62. For t...

Embodiment 3

[0027] Example 3: Breaking hammer of single roll crusher

[0028] Manufacture of the main body: 30CrMo material castings are used to process the main body with a width of about 200mm, a thickness of 100mm and a length suitable for the working surface of the crown part.

[0029] Making blind holes: Because the head crown is more prone to wear and tear, the side of the working area is formed into an approximate triangle with a side length of 180mm to drill blind holes on both sides, and drill blind holes on the top along the midline. The diameter of the blind hole is 25mm, the center distance between adjacent blind holes is about 12mm, the depth is 35mm, and the number of blind holes on the top is 4, the purpose of which is to prevent the wear of the flow channel.

[0030] Overlay welding filling: filling wear-resistant welding consumables in the form of overlay welding. In this embodiment, the same kind of wear-resistant welding material is used for surfacing welding twice. W...

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Abstract

The invention provides a method for manufacturing a wear-resistant metal piece. A body of the wear-resistant piece is manufactured according to the conventional process, and, in a work area of the body of the wear-resistant piece, the following process steps are performed: manufacturing blind holes which are alternated one another on the surface of the body of the wear-resistant piece; and overlaying and filling a wear-resistant welding material in the blind holes. After the blind holes are overlaid and filled, the wear-resistant welding material is continuously overlaid on the surface to form a wear-resistant protective layer. The wear-resistant welding materials in different specifications can be adopted on the same body. The wear-resistant metal piece subjected to the overlaying process is subjected to thermal treatment to eliminate internal stress generated in welding. The method can meet the requirements on abrasion resistance, impact resistance, thick layer abrasion resistance and the like of the wear-resistant metal piece. The method is simple and reasonable, is easy to operate, and has low cost. The wear-resistant metal piece has good wear resistance, and the service life is remarkably prolonged. The method is suitable for companies manufacturing wear-resistant metal pieces.

Description

technical field [0001] The invention relates to a method for processing and manufacturing mechanical parts, in particular to a method for manufacturing metal wear-resistant parts aimed at improving the wear resistance of metal parts. Background technique [0002] The main methods of manufacturing metal wear-resistant parts are: 1. heat treatment and surface hardening; 2. metal surface surfacing and spray welding spraying; 3. wear-resistant integral casting; 4. wear-resistant composite casting; Wait. Aiming at the working conditions of thick layer anti-wear, anti-wear and impact resistance required for anti-abrasive wear, and to obtain a higher cost performance, the above-mentioned manufacturing methods of wear-resistant parts have their own shortcomings. [0003] Heat treatment and surface hardening are used to manufacture wear-resistant parts with low abrasive wear resistance, and are generally used in low-wear conditions, such as shafts and gear workpieces. Among the wea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P17/00B23K31/02
Inventor 周卓林
Owner HUNAN DEUSINO WEAR RESISTANT IND CO LTD
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