CN102061420A

CN102061420A - Alloy with low specific gravity and preparation method thereof

Info

Publication number: CN102061420A
Application number: CN 201110035425
Authority: CN
Inventors: 邵化; 彭忠元
Original assignee: ZHUZHOU CHANGJIANG CARBIDE TOOLS CO Ltd
Current assignee: ZHUZHOU CHANGJIANG CARBIDE TOOLS CO Ltd
Priority date: 2011-02-10
Filing date: 2011-02-10
Publication date: 2011-05-18

Abstract

The invention discloses an alloy with low specific gravity and a preparation method thereof. The alloy with low specific gravity is prepared from the following components in percentage by weight: 8-9 percent of Co, 14.5-15.5 percent of TiC and the balance of WC, has the specific gravity smaller than 12.0g/cm<3>, the HV30 of 1550-1650 and the abrasive resistance test RS value of 50-65. The preparation method comprises the following steps of: selecting raw materials; blending the raw materials; carrying out ball milling; calendaring and sintering, and the preparation method is characterized in that the blending of the raw materials is carried out by firstly adding 30 percent by weight of WC powder with the Fsss granularity of 1.0-1.5 mum, then adding 35.15-40.75 percent of YT zinc melting stock of a less known brand and adding 0.05-0.055 percent of Co powder and 24.00-29.40 percent of composite carbide CK32 according to the weight percentage of all components of the alloy with the low specific gravity, wherein the carbon balance value is (-0.05)-(-0.1) percent in the case of blending calculation. The prepared alloy has low cost and meets the client requirement for the wearing resistance of anti-skid stud products.

Description

The low-gravity Alloy And Preparation Method

Technical field

The present invention relates to a kind of low-gravity alloy and preparation thereof, especially is the low-gravity Alloy And Preparation Method of main raw material with the reworked material.

Background technology

It is raw material (cobalt quality percentage composition is 8%, the surplus wolfram varbide) production that the safety stud product generally adopts conventional Wimet trade mark YG8, proportion 14.5 g/cm ³About, HV ₃₀1350～1450, raw materials cost and selling price are basic identical, and no profit can be sayed; Simultaneously, the safety stud product RS value of conventional YG8 trade mark preparation is 70～90, can not satisfy wear resistance RS value that safety stud improves constantly and be 50～65 requirement.

Summary of the invention

The purpose of this invention is to provide a kind of low specific weight hard Alloy And Preparation Method, the cost of alloy of preparation is cheap and satisfy the requirement of client to safety stud product wear resistance.

For achieving the above object, low specific weight hard alloy of the present invention comprises weight percent and is 8～9 %Co, 14.5～15.5% TiC, surplus are WC; Its proportion＜12.0g/cm ³, HV ₃₀Be 1550～1650, wearability test RS value 50～65.

Its preparation method, comprise raw-material selection, batching, ball milling, compacting, sintering, it is characterized in that: add earlier weight percent during batching and be 30%, the Fsss granularity is the WC powder of 1.0～1.5 μ m, add YT zinc melt 35.15～40.75% of inferior brand again, and add 0.05～0.055% Co powder, 24.00～29.40% composite carbide CK32 according to each weight percentages of components of described low-gravity alloy; During charge calculation, the carbon balance value is (0.05～-0.1) %.

Because added weight percent in the raw material and be 30%, the Fsss granularity is the WC of 1.0～1.5 μ m, the HV of the alloy of preparing ₃₀Can between 1550～1650, the RS value between 50～60, wear resistance can satisfy the safety stud product requirement fully; Adopting YT class zinc melt of inferior brand is that regenerative raw materials is a main raw material, with low cost, and reduction along with alloy proportion, the grain number that the safety stud product grain number of every kilogram of production of this alloy is produced than the YG8 trade mark increases more than 15%, is that unit is sold and work as product with the grain number, again the product profit that further increases.

Embodiment

Embodiment 1: configuration 1000g raw material, and wherein the Fsss granularity is that the WC powder of 1.3 μ m is 300g, is that weight percent is 30%, selects YT zinc melt of inferior brand 388.5g again for use, wherein TiC 12.06%, Co 8.05%; The composition 8.5%Co of the low-gravity alloy that obtains according to ultimate demand, 15% TiC, surplus are WC again, add the Co of 53.7g and the composite carbide CK32 of 257.8g in raw material; Charge calculation, carbon balance value are-0.05%.Carry out ball milling granulation, compacting, sintering after the batching, wherein ball milling is done medium, ratio of grinding media to material 5:1,48 hours ball milling time with alcohol.Be pressed into SP2 intensity bar sample after the granulation, in hydrogen furnace, 1480 ℃ of sintering temperatures, the hart metal product of acquisition, wherein Co, TiC weight percent are respectively 8.48%, 15.05%, and surplus is WC; This alloy proportion is 11.24g/cm ³, HV ₃₀: 1550, wearability test RS value is 56.

Embodiment 2: configuration 1000g raw material, and wherein the Fsss granularity is that the WC powder of 1.25 μ m is 300g, is that weight percent is 30%, selects YT zinc melt of inferior brand 407.2g again for use, wherein TiC 11.84%, Co 7.17%; The composition 8.0%Co of the low-gravity alloy that obtains according to ultimate demand, 14.5% TiC, surplus are WC again, add the Co of 50.8g and the composite carbide CK32 of 242g in raw material; Charge calculation, carbon balance value are-0.08%.Carry out ball milling granulation, compacting, sintering after the batching, wherein ball milling is done medium, ratio of grinding media to material 5:1,48 hours ball milling time with alcohol.Be pressed into SP2 intensity bar sample after the granulation, in hydrogen furnace, 1480 ℃ of sintering temperatures, the hart metal product of acquisition, wherein Co, TiC weight percent are respectively 8.04%, 14.52%, and surplus is WC; This alloy proportion is 11.26g/cm ³, HV ₃₀: 1580, wearability test RS value is 53.

Embodiment 3: configuration 1000g raw material, and wherein the Fsss granularity is that the WC powder of 1.25 μ m is 300g, is that weight percent is 30%, selects YT zinc melt of inferior brand 351.8g again for use, wherein TiC 11.84%, Co 7.17%; The composition 9.0%Co of the low-gravity alloy that obtains according to ultimate demand, 15.5% TiC, surplus are WC again, add the Co of 54.8g and the composite carbide CK32 of 293.4g in raw material; Charge calculation, carbon balance value are-0.1%.Carry out ball milling granulation, compacting, sintering after the batching, wherein ball milling is done medium, ratio of grinding media to material 5:1,48 hours ball milling time with alcohol.Be pressed into SP2 intensity bar sample after the granulation, in hydrogen furnace, 1480 ℃ of sintering temperatures, the hart metal product of acquisition, wherein Co, TiC weight percent are respectively 8.97%, 15.48%, and surplus is WC; This alloy proportion is 11.18g/cm ³, HV ₃₀: 1600, wearability test RS value is 62.

Claims

1. low specific weight hard alloy, comprising weight percent is the TiC of 8～9%Co, 14.5～15.5 %, surplus is WC; Its proportion＜12.0g/cm ³, HV ₃₀Be 1550～1650, wearability test RS value 50～65.

2. the preparation method of low specific weight hard alloy as claimed in claim 1, comprise raw-material selection, batching, ball milling, compacting, sintering, it is characterized in that: add earlier weight percent during batching and be 30%, the Fsss granularity is the WC powder of 1.0～1.5 μ m, add YT zinc melt 35.15～40.75% of inferior brand again, and add 0.05～0.055% Co powder, 24.00～29.40% composite carbide CK32 according to each weight percentages of components of described low-gravity alloy; During charge calculation, the carbon balance value is (0.05～-0.1) %.