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CN-121973086-A - Iron-based binding agent honing stick and preparation method thereof

CN121973086ACN 121973086 ACN121973086 ACN 121973086ACN-121973086-A

Abstract

The invention provides an iron-based binding agent honing sand strip which comprises, by mass, 40% -60% of iron powder, 10% -30% of copper powder, 3% -15% of tin powder, 2% -15% of nickel powder, 1% -10% of tungsten carbide powder, 0.1% -5% of cerium oxide, 0.5% -5% of an additive and the balance of cubic boron nitride. The invention adopts the formula of the bonding agent taking iron powder as the main body, overcomes the defects of short service life and high cost of the traditional copper-based bonding agent sand strip, and provides the honing sand strip with the advantages of long service life, good processing quality and low cost. The iron powder is nontoxic, and the binding agent using the iron powder as a main body can furthest protect the health of a sand strip producer. The iron-based bonding agent honing stick provided by the invention can improve the reticulate pattern qualification rate of the cylinder sleeve, optimize the oil storage lubrication function, reduce the risk of cylinder pulling and prolong the service life of an engine. Meanwhile, the good reticulate patterns can reduce the phenomenon of engine oil burning, reduce the emission of particulate matters and hydrocarbon, and further protect the environment.

Inventors

  • CHEN CHONG
  • HUANG RONG
  • Yin Weiding
  • CUI LEI
  • TAO HONGJUN
  • CAO HONGXING

Assignees

  • 中原内配集团鼎锐科技有限公司

Dates

Publication Date
20260505
Application Date
20260209

Claims (10)

  1. 1. The iron-based binding agent honing stick is characterized by comprising the following raw materials in percentage by mass: 40-60% of iron powder, 10-30% of copper powder, 3-15% of tin powder, 2-15% of nickel powder, 1-10% of tungsten carbide powder, 0.1-5% of cerium oxide, 0.5-5% of additive and the balance of cubic boron nitride.
  2. 2. The iron-based binder honing stick of claim 1 wherein the additive is selected from one or more of graphite, molybdenum disulfide, zinc stearate, naphthalene.
  3. 3. The iron-based binder honing stick according to claim 1, characterized in that the particle size of the cerium oxide is 20-30 μm; The particle sizes of the iron powder, the copper powder, the tin powder, the nickel powder, the tungsten carbide powder and the additive are less than or equal to 80 mu m; The granularity of the cubic boron nitride is 200/230.
  4. 4. The iron-based binder honing stick of claim 1, wherein the iron-based binder honing stick has an overall hardness of 90-110HRB.
  5. 5. The iron-based binder honing stick of claim 1, wherein the distribution density of the cubic boron nitride in the iron-based binder honing stick is 30-100 pieces/mm 2 .
  6. 6. A method for preparing the iron-based binder honing stick according to any one of claims 1 to 5, characterized by comprising the following steps: a) Mixing iron powder, copper powder, tin powder, nickel powder, tungsten carbide powder, cerium oxide, an additive and cubic boron nitride to obtain a mixture; B) And (3) carrying out hot-pressing sintering on the mixture after filling the die to obtain the iron-based bonding agent honing sand strip.
  7. 7. The method of claim 6, wherein step a) comprises the steps of: Mixing iron powder, copper powder, tin powder, nickel powder, tungsten carbide powder, cerium oxide and additives for 6-8 hours, and then mixing with cubic boron nitride for 3-5 hours to obtain a mixture.
  8. 8. The method of manufacturing according to claim 6, wherein the die-filling comprises the steps of: (1) The assembly mould is used for selecting a proper graphite mould for assembly according to the size of the sand strip; (2) Weighing a certain weight of mixture, putting the mixture into an assembled graphite mold layer by layer, and smoothing the mixture by using a scaler; (3) And (3) closing the dies, namely installing the die upper covers into the dies after feeding the materials one by one and compacting.
  9. 9. The method of manufacturing according to claim 6, wherein the hot press sintering comprises the steps of: Stage hot pressing is carried out under vacuum conditions: the temperature in the first stage is set to 450-500 ℃, the temperature is kept for 2-3min, and the pressure is set to 20-25MPa; The temperature in the second stage is 650-700 ℃, the temperature is kept for 2-3min, and the pressure is set to 30-35MPa; the temperature in the third stage is 750-800 ℃, the temperature is kept for 3-4min, and the pressure is 40-45MPa.
  10. 10. The method of manufacturing according to claim 6, further comprising cooling, trimming and inspection after the hot press sintering.

Description

Iron-based binding agent honing stick and preparation method thereof Technical Field The invention belongs to the technical field of abrasive materials, and particularly relates to an iron-based binding agent honing stick and a preparation method thereof. Background Honing is a key process for processing engine cylinder liners, and the quality of the honing directly influences the oil consumption, emission and service life of an engine. The honing stick is a core tool for honing, and consists of three parts of abrasive materials, binding agents and air holes. Currently, the mainstream high-end honing sticks (especially diamond or CBN sticks) on the market generally use copper-based binders. Copper-based bonding agents (commonly used bronze bonding agents), although having good toughness and good holding force for abrasive materials, have poor wear resistance, resulting in a relatively short service life of the sanding strip, requiring frequent replacement, affecting processing efficiency and increasing single piece cost. Cobalt is often added to copper-based binder bars to improve wear resistance, however, cobalt is extremely expensive and fluctuates widely, resulting in high production costs for bars. Therefore, there is an urgent need in the art for a new binder formulation that maintains the excellent properties (good processing quality) of copper-based binders, and increases the service life of the sanding strip while reducing production costs. Disclosure of Invention In view of the above, the technical problem to be solved by the invention is to provide an iron-based bonding agent honing stick and a preparation method thereof. The invention provides an iron-based binding agent honing stick, which comprises the following raw materials in percentage by mass: 40-60% of iron powder, 10-30% of copper powder, 3-15% of tin powder, 2-15% of nickel powder, 1-10% of tungsten carbide powder, 0.1-5% of cerium oxide, 0.5-5% of additive and the balance of cubic boron nitride. Preferably, the additive is selected from one or more of graphite, molybdenum disulfide, zinc stearate and naphthalene. Preferably, the particle size of the cerium oxide is 20-30 μm; The particle sizes of the iron powder, the copper powder, the tin powder, the nickel powder, the tungsten carbide powder and the additive are less than or equal to 80 mu m; The granularity of the cubic boron nitride is 200/230. Preferably, the iron-based binder honing stick has an overall hardness of 90-110HRB. Preferably, in the iron-based binder honing stick, the distribution density of the cubic boron nitride is 30-100 pieces/mm 2. The invention also provides a preparation method of the iron-based binding agent honing stick, which comprises the following steps: a) Mixing iron powder, copper powder, tin powder, nickel powder, tungsten carbide powder, cerium oxide, an additive and cubic boron nitride to obtain a mixture; B) And (3) carrying out hot-pressing sintering on the mixture after filling the die to obtain the iron-based bonding agent honing sand strip. Preferably, step a) comprises the steps of: Mixing iron powder, copper powder, tin powder, nickel powder, tungsten carbide powder, cerium oxide and additives for 6-8 hours, and then mixing with cubic boron nitride for 3-5 hours to obtain a mixture. Preferably, the die filling includes the steps of: (1) The assembly mould is used for selecting a proper graphite mould for assembly according to the size of the sand strip; (2) Weighing a certain weight of mixture, putting the mixture into an assembled graphite mold layer by layer, and smoothing the mixture by using a scaler; (3) And (3) closing the dies, namely installing the die upper covers into the dies after feeding the materials one by one and compacting. Preferably, the hot press sintering includes the steps of: Stage hot pressing is carried out under vacuum conditions: the temperature in the first stage is set to 450-500 ℃, the temperature is kept for 2-3min, and the pressure is set to 20-25MPa; The temperature in the second stage is 650-700 ℃, the temperature is kept for 2-3min, and the pressure is set to 30-35MPa; the temperature in the third stage is 750-800 ℃, the temperature is kept for 3-4min, and the pressure is 40-45MPa. Preferably, after the hot press sintering, cooling, trimming and inspection are further included. Compared with the prior art, the invention provides an iron-based binding agent honing sand strip, which comprises, by mass, 40% -60% of iron powder, 10% -30% of copper powder, 3% -15% of tin powder, 2% -15% of nickel powder, 1% -10% of tungsten carbide powder, 0.1% -5% of cerium oxide, 0.5% -5% of an additive, and the balance of cubic boron nitride. The invention adopts the formula of the bonding agent taking iron powder as the main body, overcomes the defects of short service life and high cost of the traditional copper-based bonding agent sand strip, and provides the honing sand strip with the advantages of long service life, good