JPS6284885A - Edge body for soil work or the like and its manufacture - Google Patents

Abstract

PURPOSE:To improve the wear resistance of an edge body and to reduce the manufacturing cost by forming a powder body having a high hardness and a high wear resistance, in the corresponding surfaces of a pair of base material steel plates, and subsequently, polymerizing and joining each powder layer by the means of rolling, forge welding, etc. CONSTITUTION:On an edge body manufacturing line, a hopper 7 containing a high hardness/high wear resistance powder body 8 is provided, and also a calcination furnace 9 is provided. By the calcination furnace 9, a base material 6 is brought to red heat at a high temperature, and also the powder body 8 is calcinated and a powder layer 10 is formed on the base material 6. Also, in other line of the same kind, a powder layer 10' formed by making a powder body 8' adhere onto a base material 6' is formed, and both powder layers 10, 10' of the materials 6, 6' are pressed strongly against a clad roller 12. According to this method, the powder layers 10, 10' are anchor-coupled firmly to each other, and an edge body base material A which are polymerized and joined strongly is obtained. Accordingly, the wear resistance of the edge body A is improved and the manufacturing cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to improvements in various blade bodies used for soil work, specifically for agricultural work equipment and the like, as well as methods for manufacturing the same.

(Prior art) For example, as agricultural soil working equipment, there are plows and plows for tilling the soil, rotary machines for tilling and crushing the soil, rakes and harrows for leveling the soil, and even more. There are mowers and the like that are related to this work, and these are equipped with the most important blade that performs the work function.

One example is the rotary tiller blade. This tilling claw blade has impact resistance and wear resistance.
Steel materials such as No. 4 have been conventionally used, and their surfaces are hardened by heat treatment to particularly improve wear resistance. In addition to the above-mentioned tilling claw blade, there is also one made of three-layer steel plate as shown in FIG. In the figure, the middle layer 1 is a steel plate with high hardness and wear resistance, and the upper layer 2 and the lower layer 3 are made of relatively soft steel plates to provide toughness. The cladding material consisting of 3 is manufactured by a hot welding rolling method or the like.

(Problems to be Solved by the Invention) Even in the case of a tiller blade made of the conventional single steel material and subjected to heat treatment, the hardened layer is at most 0.3 to 0.5
It was approximately 1.0 mm in diameter and rapidly wore out within a short period of time, and users considered it a consumable item and discarded it as a matter of course. In addition, in the tilling claw blade using the craft material shown in 10, by using a thick wear-resistant material for the intermediate layer 1, the part indicated by the reference numeral 5.5 in the leading edge portion 4 shown in the same figure wears out first. By maintaining its sharpness, it has a relatively long lifespan compared to the former, but there is a risk of peeling between the layers due to impact, etc., and sometimes separation and scattering, leading to a major accident. These problems are not limited to the above-mentioned tilling blade, but are common to other blades for soil work.

(Means for Solving the Problems) The present invention provides a blade body for soil work, etc., and a method for manufacturing the same, in order to solve the above-mentioned conventional problems. A powder layer is formed by attaching a highly wear-resistant powder, and then the powder layers of a pair of steel plates having the powder layer are brought into contact with each other and polymerized and joined by rolling, forge welding, explosion welding, or diffusion means. The method is to form a blade material, and then use the blade material to obtain a blade.

(Example) A basic embodiment of the invention is shown in FIGS. 1-6.

FIG. 1 shows a manufacturing line for the blade material A of the present invention, with 6
is hot-rolled 5UP6 or 5 having a predetermined thickness and width.
It is a base material (rope material) such as UP4.

Reference numeral 7 denotes a hopper containing a powder with high hardness and high wear resistance, or a powder mixture 8 of the powder and a base material.
The powder 8 is applied to the surface of the base material 6 from the bottom to a predetermined thickness as shown in FIG. As shown in If, over the entire width of the base material,
Alternatively, it is spread and laid over a part of the width of the part that will become the edge of the blade body in the future. At this time, the amount of powder supplied from the hopper 7 is controlled by appropriate means.

In addition, the powder body 8 having high hardness and high wear resistance used in the present invention is WC% MOC% TiCs TiN 5
B4CSBN, Diamond, 5isNa, StC%
Sialon, ZrB, , TiB2, AhOs, Zr0
z and combinations thereof. Alternatively, cemented carbide powder may be used. At this time, if these powders do not have good wettability with the base material, it is preferable to use powders with improved wettability by modifying the surface of these powders. Further, in the present invention, it is also possible to use a mixture of the powder and a metal powder that is compatible with the base material (for example, a metal powder of the same type as the base material).

The powder body 8 used in the embodiment of the present invention is the above-mentioned WC,
It is preferable to use pulverized scrap produced during the production of TiC, etc., and its external shape is sharp, resembling crushed glass. however,
The present invention is not limited to the above-mentioned scrap. FIG. 3 is an enlarged view of the powder 8 spread and laid on the base material 6, and in order to maintain this state, a liquid binder made of an inorganic material or the like may be sprayed as necessary. Reference numeral 9 denotes a calcining furnace in which the base material 6 is heated to a high temperature and the powder 8 is calcined, and the powder layer 10 is formed by adhering the powder 8 onto the base material 6. 11 is not shown, but on another line same as above, a powder layer 10'' is formed by depositing 8 degrees of powder on the base material 6''. ′ is transferred so as to correspond to the powder layer 10. 12 is a Talara drol, and the base material 6 having the powder layer 10 and the base material 6′ having the powder layer 10′ are both powder layers 1
0.10° serves as a bonding interface, and the rolls 12 press the edges strongly from above and below to obtain a polymerized and bonded blade material A.

FIG. 4 is a cross-sectional view of the blade material A, and FIG. The base material 6 is deeply inserted into the base material 6, and the base material 6 is located at the interface.
, 6' are bonded close to metallurgical bonding, and the powders 10 and 10' form an anchor bond to each other due to their sharp shapes, and combined with the good wettability of the base materials 6 and 6', the overall A strong polymeric bond is formed. In addition,
In the above embodiment, the polymer bond is made stronger by further diffusion heating and re-rolling with rolling rolls behind the Talaradro roll 12 in FIG. 1.

The blade material A obtained as described above is formed into the shape of a blade body as shown in FIG. 6 by appropriate conventional forging, pressing means, etc.

The above is a basic embodiment of the present invention, and the rolling method of hot rolling and joining is shown as the polymerization method. However, cold rolling and joining may also be performed, and the process is shown in Fig. 7. show.

Further, in the present invention, the above-mentioned polymerization means of hot/cold rolling joining has been described, but hot/cold forging/pressure welding means can also be adopted, and an example of the process is shown in FIG. 8. FIG. 9 shows an explosive welding method as another embodiment of the present invention.

Note that the dotted lines in both figures mean that heating may be omitted.

(Effects of the Invention) The present invention includes forming a powder layer by substantially adhering high hardness and high wear resistance powder to one surface of a steel plate that is a base material, and then forming a powder layer on a pair of steel plates having the powder layer. A blade material was obtained in which the powder layers were brought into contact with each other and polymerized and bonded by rolling, forge welding, explosion welding, or diffusion means, and the blade body was manufactured using this as the raw material, so the bonded interface part was substantially hard.・A layer with a constant thickness is formed as a highly wear-resistant powder layer, and the appearance is the same as that of conventional 3.
A composite layer with a layered structure is formed, and at this time, the powder layer is deeply (embedded) in the steel plate that is the base material, and at the joining interface, the base materials are joined to a nearly metallurgical state, and one side The steel material allows the powder layer to bond to the powder in the other powder layer, or to the powder and the base metal to achieve an extremely strong polymer bond, and the blade body manufactured using this material can withstand large impact forces. Furthermore, the joint interface part has a relatively thick wall, high hardness, and high wear resistance because it is a hardened layer made of powder, so it maintains the toughness of the blade while improving wear resistance. In addition, it has been possible to provide a product with excellent sharpness, and its manufacturing method uses well-known equipment such as rolling and forge welding, and has the advantage that it can be manufactured at a low cost.

[Brief explanation of drawings]

FIG. 1 is a process explanatory diagram showing one embodiment of the manufacturing method of the present invention,
Fig. 2 is a plan view of the powder spreading state, Fig. 3 is an enlarged view of the powder spreading state, Fig. 4 is a sectional view of the blade material, Fig. 5 is an enlarged view of the joint interface, and Fig. 6 is an enlarged view of the powder spreading state. FIG. 7, FIG. 8, and FIG. 9 are process diagrams of other embodiments of the present invention, and FIG. 10 is a side sectional view of a conventional blade product. 6.6°・−Base material (steel plate), ? -Hopper, 8-・High hardness/high wear resistance powder, 10.10”-・Powder layer, 1
2...Talaradrol, 13-...Interfacial junction,
A--Blade material. Patent Applicant: Kubota Iron Works Co., Ltd. Procedural Supervisor (1) December 27, 1985, 1985 Patent No. 225610 2, Title of invention vs. blade body for soil work, etc. and its manufacturing method 3, Amendment Relationship with the case of a person who does
Year, month, day 6, subject of amendment/column for detailed explanation of the invention in the specification/drawing 7, content of amendment (1) "Crank material shown in rlO" on page 3, line 4 of the specification, Correct it to "the clad material shown in Fig. 10". (2) rTiC, J on page 5, line 7 is rM. Correct it as "C". (3) The phrase "depends on powder" on page 8, line 8 of the same document shall be amended to read "depends on powder." (4) Figure 7 of the attached drawings has been amended as shown in the attached sheet.

Claims (1)

[Scope of Claims] 1. A pair of steel plates having a powder layer of substantially high hardness and high wear resistance powder on one side, the powder layers of which are brought into contact with each other and integrally polymerized and joined. A blade body for soil work etc. characterized by the following. 2. A powder layer with high hardness and high wear resistance is substantially adhered to one surface of a steel plate that is a base material, and then the powder layers of a pair of steel plates having the powder layer are brought into contact with each other. Manufacturing of blades for soil work, etc., characterized by forming a blade material by polymerizing and joining by rolling, forge welding, explosion welding, or diffusion means, and then using the blade material to obtain the blade body. Law.