Method used for manufacturing composite wear-resistant hammerhead from hard alloy through high temperature casting

A technology of cemented carbide and steel-bonded cemented carbide, which is applied in the field of high-temperature inlay-cast cemented carbide to manufacture composite wear-resistant hammer heads, which can solve the problem that the hammer handle and cemented carbide are easy to fall off, and the cemented carbide and hammer matrix are not well bonded. The problems such as fastness and pouring combination are difficult, and the effect of low cost, good anti-oxidation performance and simple process is achieved.

Active Publication Date: 2018-08-28
嘉禾县飞恒合金铸造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem solved by the present invention is that it is difficult to combine the molten metal of the hammer head matrix with the cold hammer handle and hard alloy pouring, the cemented carbide and the hammer head matrix are not firmly combined, and the hammer handle and the cemented carbide are easily formed in the hammer head matrix. fall off

Method used

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  • Method used for manufacturing composite wear-resistant hammerhead from hard alloy through high temperature casting
  • Method used for manufacturing composite wear-resistant hammerhead from hard alloy through high temperature casting

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Embodiment 1

[0038] Embodiment 1, the unit weight of the hammer head in this embodiment is 10kg, and the hammer handle is pre-cast with low-alloy high-strength steel, wherein the mass fraction of the chemical composition of the low-alloy high-strength steel is C 0.32-0.38%, Mn 1.6 -1.9%, Si 1.45-1.75%, V 0.10-0.20%, the balance is Fe, the mechanical properties are σb 1840Mpa, σ0.2 1580MPa; the alloy for inlay casting is titanium carbide-based steel-bonded carbide TM65, and its shape is Rod, size The center of one end of the alloy rod is welded with a fixed pin, the size is All are produced by our company; the mass parts of its components are Cr0.6-1.0%, Mo0.8-1.4%, C 0.8-1.0%, MnFe powder 4.0-7.0%, TiC 32.0-35.0%, and the balance is Fe ;Mechanical and physical properties: density 6.4g / ㎝ 3 , sintered hardness HRC 63-65, bending strength 1500-1800MPa, impact toughness 6.0-8.0J / ㎝ 2 The hammer head material that the present invention selects is ZG120Mn13Cr2 austenitic manganese steel; The...

Embodiment 2

[0040] Example 2, the overall hammer base is high manganese steel, with a single weight of 110kg, and the casting material of the hammer is titanium carbide-based steel-bonded hard alloy TM65, the shape is rod-shaped, and the size is and Two types, the center of one end of the rod is welded with a dowel, the size is The above materials are produced by our company. The composition and mass fraction of steel-bonded cemented carbide TM65 are: Cr 0.6-1.0%, Mo 0.8-1.4%, C 0.8-1.0%, MnFe powder 4.0-7.0%, TiC 32.0-35.0%, and the balance is Fe; The mechanical and physical properties are: density 6.4g / ㎝ 3 , sintered hardness HRC 63-65, bending strength 1500-1800MPa, impact toughness 6.0-8.0J / ㎝ 2 ; Hammer base material of the present invention is ZG120Mn13Cr2 austenitic manganese steel;

[0041] The present embodiment utilizes the foamed plastic mold to realize high-temperature inlay casting. The quality of the inlaid casting hammer head is 110 kg, and the specific implementatio...

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Abstract

The invention discloses a method used for manufacturing a composite wear-resistant hammerhead from a hard alloy through high temperature casting. The composite wear-resistant hammerhead comprises a hammer handle, a hammerhead base body, and the hard alloy embedded in the hammerhead base body. The method comprises following steps: the hard alloy is fixedly arranged in a casting mold, the casting mold is heated to 1100 to 1250 DEG C, casting of molten metal of the hammerhead base body is carried out so as to form metallurgical bonding between the hammerhead base body and the hard alloy, after cooling, a mold shell is removed so as to obtain the composite wear-resistance hammerhead. According to the method, high temperature casting is capable of removing defects, such as casting alloy block shedding caused by cold shut, generation of holes caused by blocking of molten steel by cold iron and fill shrink, pores caused by obstruction on gas elimination, and cracks caused in cooling shrinkage,caused by cold iron casting; high temperature casting is capable of realizing metallurgical bonding between the hammerhead base body and the hard alloy in the hammerhead base body, and obtaining compact castings.

Description

technical field [0001] The invention relates to a method for manufacturing a composite wear-resistant hammerhead with a high-temperature insert-cast hard alloy, and belongs to the technical field of wear-resistant materials. Background technique [0002] Crusher hammer is a kind of anti-wear structural material used under the condition of contact friction and wear of strong impact hard materials. It is a wearing part with fast wear and large consumption. Because of the frequent and troublesome hammer replacement, there are many materials and methods for manufacturing composite hammer heads, but there is no high-temperature insert-casting cemented carbide to manufacture composite durable hammer heads. The method of grinding the hammer head. [0003] At present, the hammer head materials used in the crusher industry generally include high manganese steel, high chromium cast iron and low alloy wear-resistant steel. The high manganese steel hammer head has good toughness and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/12C22C38/22C22C38/28C22C38/38B22C9/04B22C9/22B22D19/16
Inventor 张春友
Owner 嘉禾县飞恒合金铸造有限公司
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