JPH03216263A - Manufacture of wear resistant parts inserting ferrous composite material as cast-in - Google Patents

Abstract

PURPOSE:To employ a reinforced fiber as a composite material and to facilitate the handling by alternately laminating the reinforced fiber and ferrous super plastic material lined up to the same direction, slicedly cutting the composite material executing hot pressing at the right angle to the fiber and inserting this as cast-in to a position it is required. CONSTITUTION:By alternately laminating the reinforced fiber 2 and the ferrous super plastic material 3 lined up to the same direction, the hot pressing P is executed to manufacture a plate of the composite material 1. Successively, this plate of composite material 1 is slicedly cut to make small pieces 4, and this is set at tip part of a mold 5 for tooth 8 and the molten metal is poured to insert the small pieces 4 and the tooth 6 having sediment wear resistance is obtd.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to the production of wear-resistant parts made by slicing and casting a composite material consisting of reinforcing fibers (long fibers) and iron-based superplastic material. Regarding law. (Prior art) Conventionally, wear-resistant materials have been made of hard materials that exceed the hardness of the mating material, and relatively soft materials that absorb stress within their elastic limits and prevent plastic deformation (e.g. wear-resistant rubber, polyurethane, etc.).
There are two systems. In the case of construction machinery parts, the former material is used in consideration of impact resistance and temperature rise due to friction. Specifically, high-manganese steel, low-alloy steel, and high-alloy steel are used after being hardened by processing or heat treatment. Hardfacing, thermal spraying, etc. are also sometimes used as hardfacing. (Problem to be Solved by the Invention) However, with conventional material improvement methods such as adding alloying elements and heat treatment, as shown in the scratch test results with sand in Figure 7, when SS41P (hardness about 160HB) is 1, SCM4l5 (carburized) with the least wear (hardness approximately 7008B)
However, the wear ratio is 0.6, so there is a limit to the improvement in wear resistance. Furthermore, because it is currently not possible to design parts that give the necessary mechanical properties only to the necessary parts, materials, processing methods, and heat treatments must be selected to satisfy the required quality in the parts with the most severe usage conditions, resulting in high costs. It has become. Another method is to use steel-based composite materials reinforced with ceramic fibers with extremely high hardness as shown in Table 1 as wear-resistant materials. Table 1 However, there are problems that need to be solved when applying metal matrix composite materials to mechanical parts. Many of the metal matrix composite materials currently produced are based on aluminum.
Considering the heat generated by friction, rope base is considered to be a good wear-resistant material for construction machinery, but there are almost no rope-based materials. The reason for this is that the purpose of developing metal-based composite materials is to reduce weight and improve specific strength, and this purpose cannot be achieved with a steel-based material. This is because the ceramic fibers, which are the reinforcing material, are damaged and the specified mechanical properties cannot be maintained. Furthermore, ceramic fibers are very expensive, and even if good products can be made depending on how they are used, they can be very expensive. The present invention aims to solve these problems. (Means for Solving the Problems) In order to achieve the above object, the present invention uses a composite material produced by alternately stacking reinforcing fibers arranged in the same direction and iron-based superplastic material and hot-pressing the reinforcing fibers arranged in the same direction. It is characterized by being sliced in a direction perpendicular to the shape and cast in the required area. (Function) With the above configuration, by using iron-based superplastic material that can be formed at low temperatures, it is possible to produce a rope-based composite material without damaging the reinforcing fibers during compounding, and it is also possible to create a rope-based composite material without damaging the reinforcing fibers during compounding. It is possible to create a wear-resistant material by casting a composite material of Beth.

(Example) An example of the present invention will be described in detail based on the drawings. The wear resistance of the ceramic composite material is determined by the ALz of the AL alloy in Figure 5.
It is extremely resistant to soil and sand, as seen in its Os content and soil and sand abrasion resistance. In the present invention, a method will be described in which a steel-based composite material is manufactured and cast into the tip of a tooth (8) of a bucket (7) of a construction machine shown in Fig. 6. 1st
As shown in Figure (a), reinforcing fibers (2
) and iron-based superplastic material (3
) are stacked alternately and hot pressed (P).
Manufacture plate (1) of the composite material shown in Figure 1(b). This composite material (1) plate is sliced into small pieces (4) as shown in Figure 2, which are placed at the tip of the mold (5) of the tooth (8) shown in Figure 3, and molten metal is injected. Then, by casting the small piece (4), a tooth (6) with soil and sand wear resistance as shown in Fig. 4 is obtained. In this case, the molten metal for casting does not require mechanical properties such as wear resistance, so an inexpensive material can be used (effects of the invention) Since the present invention is constructed as described above, it has the following effects. ■Easy to handle because the reinforcing fibers are handled as a composite plate rather than directly. ■Since we use small amounts of composite materials in our products, we can provide wear-resistant materials that keep costs down. ■Since the molten metal for casting does not require mechanical properties such as wear resistance, inexpensive materials can be used.

■Since a superplastic material is used as the matrix metal, the manufacturing temperature during composite manufacturing is relatively low and does not cause damage to the reinforcing fibers.

■Since a superplastic material is used as the matrix metal, it has good formability and can create an interface where fibers and metal are well bonded.

[Brief explanation of drawings]

Figure 1 (a) is an explanatory diagram of reinforcing fibers and iron-based superplastic materials stacked alternately according to an embodiment of the present invention, (b) is an explanatory diagram of a composite material blade manufactured by hot pressing, and Figure 2 is an explanatory diagram of a composite material blade manufactured by hot pressing. Figure 1(b) is an explanatory diagram of slice cutting, Figure 3 is an explanatory diagram of the sliced small piece of Figure 2 placed in a tooth mold, and Figure 4 is an explanatory diagram of a small piece of composite material placed on the surface that requires wear resistance. A perspective view of the cast teeth, FIG. 5 is AL. (h A of AL alloy
An explanatory diagram showing L203 content and earth and sand abrasion resistance, Figure 6 is a perspective view of the construction machine Baganoto, and Figure 7 is the results of scratch tests on various metals in sand.・Composite materials・Ceramic fibers・Iron-based superplastic materials・Small pieces of composite materials・Molds・Tooths・Bakenoto・Honoto Brace processing

Claims (1)

[Claims] Composite material produced by hot-pressing reinforcing fibers (long fibers) and iron-based superplastic material arranged in the same direction alternately, then sliced in the direction perpendicular to the fibers, and cast into the required areas. A manufacturing method for wear-resistant parts by casting iron-based composite materials.