Bit matrix performance design

Based on these two points, bit matrix performance design should include

steel bonded carbide type carcass composition and its properties. Type

of steel bonded carbide matrix diamond drill design and research, in

order to replace most of the metal grinding wheel  tungsten carbide alloy, based on a certain

amount of nickel, cobalt, manganese, titanium, chromium, molybdenum and

other materials, and rare earth elements in hot conditions with the

formation of a certain hardness, wear resistance and can be securely

appropriate package insert diamond steel bonded carbide matrix [1]. We

focus on the matrix hardness, wear resistance and firmness diamond bezel

setting. Type of steel bonded carbide matrix material, you also need a

certain amount of phosphorous alloy material to replace part of pure

iron. Adding phosphorus alloy aims to reduce the sintering temperature

and increase the performance of the carcass brittle [3], and in favor of

a diamond blade in the matrix to improve the drilling time. In order to

control the phosphorus content in the matrix, in addition to a

phosphorus alloy powder, the pure iron carbonyl must join to control the

phosphorus content and improving the performance of the carcass. 1.2

steel bonded carbide type carcass test: For hard and compact rock

characteristics, drilling practices and  diamond polishing pads preliminary studies indicate

that the matrix hardness to diamond drill HRB108 ~ HRB115 more

appropriate, the wear amount of lower-middle (260 mg ~ 370 mg) is ideal.

Steel bonded carbide type carcass preliminary trials have shown that in

order to achieve these targets, the carcass of the basic formula is as

follows: P 2 iron content of 40% to 48%, as a binder metal content of

26% tin bronze ~ 32% tungsten content of 12% ~ 28%, Ni content of 5% to

10%, the cobalt content of 3% to 7%, and the remaining ingredients are

titanium, manganese, molybdenum, chromium, and rare earth. According to

this basic ratio, the sintering process in a reasonable condition,

carcass materials and manufactured diamond drill has better adaptability

and drilling results. Process for hot carcass performance will have a

significant impact, which obviously affect the sintering temperature and

pressure [4]. Therefore, in the diamond blades  study of steel bonded carbide matrix,

sintering temperature and pressure must be incorporated into the design

factors. Iron at high temperatures the diamond has some heat damage, it

should be shortened by rapid sintering and holding time. In this test,

the sintering process is designed to: sintering temperature 960 ℃,

pressure parameters 16 MPa, holding time 4 min. Sintering in SM1002A

carcass type resistance furnace controlled intelligent. The combination

of hot-pressing process is the result of many experiments and analysis

finalized, so it is reasonable. According to the above-mentioned range

of carcass composition and sintering processes, uniform design

experiments to study the carcass composition of steel bonded carbide

type changes on the carcass performance were investigated. In accordance

with the uniform design method, the experimental design of the 16 matrix

formula combinations in Table 1. Select the matrix hardness and wear

resistance properties of the target for the carcass. Matrix hardness

testing using HR - 150A Rockwell hardness tester, and select HRB as

measured values, for each combination of two samples of prototype

formulations, both sides of the direction of the pressure measured

twice, 8 hardness data were measured, taking Examples of the formulation

the average hardness value....