The drill rod solder of hard alloy

Hard alloy is the carbide of 9 kinds of metals with the IVa in periodic chart, Va, VIa a group of things with common features and Fe, Co, Ni metal of iron a group of things with common features, make the alloy floorboard that have and becomes through pulverous metallurgy method. Carbide photograph makes alloy has tall hardness and wearability, and felt photograph gifts the intensity with sure alloy and tenacity.
Basis composition, can be hard alloy cent 5 kinds big: Carbonization tungsten base titanium of hard alloy, carbonization base hard alloy, coating hard alloy, steel radical hard alloy and other hard alloy.

Hard alloy can divide by its scope of application for: Cutting tool of hard alloy cutting, hard alloy mould, hard alloy measure and wear-resisting spare parts, and mine oil geology uses hard metal 4 kinds big.

Generally speaking, WC-Co kind the use contrast of hard alloy is extensive, mould of drawing of the cutting cutting tool that can be used at cast-iron, nonferrous metal and its alloy, metal, punch mould, measure and mine machinery and geological exploration use wear-resisting part; WC-Ti-Co kind alloy is principal with Yu Gang material cutting is machined; WC-TiC- (NbC) - Co kind alloy is principal the cutting treatment that is used at qualitative part of tall hardness ability.
Although the hard alloy of other type got great progress in recent years, gained very great success in a few special use situations, but be fastened as a result of WC-Co (namely YG kind) hard alloy has very good Baconian and mechanical performance, this kind of hard alloy is now the good on industry a kind of hard alloy with the widest, the biggest dosage.
The doubt that 1. encounters when solder of hard alloy drill rod
The sex of drill rod solder of hard alloy is poorer. Because the volume containing carbon of hard alloy is higher,this is, contain a lot ofmore free carbon normally without the appearance that arrange, what hamper drill rod expects next is damp. In addition, hard alloy issues simple oxidation to form oxidation film in the temperature of drill rod solder, what also can affect drill rod to expect is damp. Consequently, it is very main that the appearance before drill rod solder arranges the damp sex that goes up in hard alloy to improving drill rod to expect, still can adopt the measure such as outside copper facing or plating nickel when necessary.
Another doubt in solder of hard alloy drill rod is contact easy happening crackle. Because its linear expansion coefficient is the half of mild steel only,this is, when the solder of matrix drill rod of hard alloy and this kind of steel, very great thermal stress can happen in contact, cause the craze of contact next. Consequently, hard alloy and different when solder of data drill rod, should try to adopt prevent crack measure.

The article arranges storage-rack.onsonhardware.com of processing factory of drill rod solder