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Graphite-based powder metallurgy material for drilling lock and preparation method of graphite-based powder metallurgy material

A powder metallurgy and powder material technology is applied in the field of powder metallurgy to prepare easy-drilling graphite-based lock body materials. Processability, improving density and preventing cracking

Active Publication Date: 2022-06-21
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the large compression resistance or poor chip breaking ability of existing padlock or gourd lock materials in the drilling process, which directly deteriorates the life of the drill bit and drilling efficiency, which in turn leads to a sharp increase in processing costs Insufficiency of the invention, a graphite-based powder metallurgy material and a preparation method thereof for drilling locks are provided

Method used

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  • Graphite-based powder metallurgy material for drilling lock and preparation method of graphite-based powder metallurgy material
  • Graphite-based powder metallurgy material for drilling lock and preparation method of graphite-based powder metallurgy material
  • Graphite-based powder metallurgy material for drilling lock and preparation method of graphite-based powder metallurgy material

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Embodiment 1

[0039] A method for preparing easy-drilling graphite-based lock materials by powder metallurgy in this embodiment is carried out according to the following steps: 959kg of iron blocks, 3kg of silicon particles, and 18kg of aluminum particles are heated and melted in a medium frequency induction furnace to 1550° C. and then injected into high-pressure mist. In the atomizing tower (the pressure of atomized argon gas and the diameter of the nozzle are 1.5MPa and 1.5mm respectively), atomized and condensed into pre-alloyed Fe-Si-Al powder material, and then sieved with a mesh to obtain Fe-Si with 250-300 meshes -Al sintering raw material; mix 98 parts of 250-300 mesh Fe-Si-Al sintering raw material and 2 parts of 500-600 mesh graphite powder in a mixer for 30 minutes at a speed of 30 r / min, and then add 0.8 part of a binder The solution (the ratio of binder and acetone is 1:10) is bonded, dried after bonding for 10 minutes, and then 0.2 parts of lubricant is added and mixed for 45 ...

Embodiment 2

[0041] A method for preparing easy-drilling graphite-based lock materials by powder metallurgy in this embodiment is carried out according to the following steps: 965kg of iron blocks, 2kg of silicon particles, and 15kg of aluminum particles are heated and melted in a medium frequency induction furnace to 1580° C. and then injected into high-pressure mist. In the atomizing tower (the pressure of atomized argon gas and the diameter of the nozzle are 1.5MPa and 1.5mm respectively), atomized and condensed into pre-alloyed Fe-Si-Al powder material, and then sieved with a mesh to obtain Fe-Si with 250-300 meshes -Al sintering raw material; mix 98.2 parts of 250-300 mesh Fe-Si-Al sintering raw material and 1.8 parts of 500-600 mesh graphite powder in a mixer for 25 minutes at a speed of 25 r / min, and then add 1.2 parts of binder The solution (the ratio of binder and acetone is 1:9) is bonded, dried for 8 minutes, then 0.5 part of lubricant is added and mixed for 40 minutes at a speed...

Embodiment 3

[0043] A method for preparing easy-drilling graphite-based lock materials by powder metallurgy in this embodiment is carried out according to the following steps: 971kg iron blocks, 1kg silicon particles, and 13kg aluminum particles are heated and melted in a medium frequency induction furnace to 1600° C. and then injected into high-pressure mist. In the atomizing tower (the pressure of atomized argon gas and the diameter of the nozzle are 1.5MPa and 1.5mm respectively), atomized and condensed into pre-alloyed Fe-Si-Al powder material, and then sieved with a mesh to obtain Fe-Si with 250-300 meshes -Al sintering raw material; mix 98.5 parts of 250-300 mesh Fe-Si-Al sintering raw material and 1.5 parts of 500-600 mesh graphite powder in a mixer for 35 minutes at a speed of 35 r / min, and then add 1.0 part of a binder The solution (the ratio of binder and acetone is 1:8) is bonded, dried after bonding for 15 minutes, then 0.3 parts of lubricant is added and the secondary mixing is...

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Abstract

The invention discloses a graphite-based powder metallurgy material for drilling a lock and a preparation method of the graphite-based powder metallurgy material, and belongs to the technical field of locks. The graphite-based powder metallurgy material for drilling the lock comprises the following chemical components in percentage by mass: 95.5 to 97.2 weight percent of Fe, 1.5 to 2.0 weight percent of C, 0.05 to 0.3 weight percent of Si, 1.2 to 2.0 weight percent of Al and the balance of inevitable trace impurities, the preparation method comprises the steps of preparation of a pre-alloyed Fe-Si-Al powder material, mixing of raw materials, compression molding of a green body and high-temperature sintering. The graphite-based powder metallurgy material not only can meet the requirements for cleaning and continuous industrial production of locks, but also can meet the requirements for continuous drilling and cutting machining of the locks, and therefore the graphite-based powder metallurgy material can be used for producing lock materials such as padlocks or calabash locks.

Description

technical field [0001] The invention belongs to the technical field of locks, and more particularly relates to a method for preparing an easy-drilling graphite-based lock body material by powder metallurgy. Background technique [0002] Padlocks are the oldest and largest family in the world of locks, and other locks are multiplied and derived from padlocks. Zhejiang Pujiang County is currently the largest distribution center for the production and sales of padlocks and hoist locks in my country. The annual output of padlocks and hoist locks exceeds 300,000 tons. The lock body is mainly divided into stainless steel lock, copper lock, iron lock and zinc alloy lock according to the material. Among them, the iron lock body is the most widely used because of its low price and good drilling performance, so the output is also the largest. [0003] At present, the material of the iron lock body on the market is mainly HT200 gray cast iron. The main reason is that there are a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/06C22C33/02B22F9/08B22F1/065B22F1/10B22F3/02B22F3/10
CPCC22C38/02C22C38/06C22C33/0264C22C33/0207B22F9/082B22F3/02B22F3/1007B22F3/1028
Inventor 万勇温永红张雪鉴汤传圣高山马冬凌霄胡宇恒
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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