Fund of TiC of modified of accept rice TiN belongs to pottery and porcelain but research of dislocation razor blade

Bending strength B.

Rupture tenacity C.

Hardness pursues the bending strength that T of 1 accept rice adds the accretion of the TiN of influence accept rice that measures mechanical to material performance to measure pair of material, rupture the influence of tenacity, hardness sees a picture 1. By the graph 1 knowable, weight is added to be less than in accept rice TiN 4% when, bending strength, rupture to the value of tenacity increases along with what add a capacity and increase somewhat, and hardness change is not big. When adding a quantity to continue to increase, 3 person have more apparent addition. Adding aggravating quantity to be 6% when, rupture tenacity and hardness reach highest value. Add weight to be 8% when bending strength reachs highest value, subsequently 3 person reduce. Accept rice TiN adds weight to be less than 4% when, mechanical performance change is not apparent, drop even, because grain of TiN accept rice is in,be photograph of high temperature fluid (the solubility that basically is the N that Ni, Ti still has a share, C) is bigger, the fast face that adds accept rice grain can be mixed fast face is active, can think to remain after agglomeration not much, because effect of this strong pliable but strong is not big. Cause the negative effect such as hole, impurity as a result of its at the same time, the hardness that brings about material possibly drops. Add when accept rice TiN when weight increases gradually, the grain of subsistent accept rice TiN in material is ceaseless grow in quantity, its coriaceous effect also is reflected gradually came out. Add weight to be more than when accept rice TiN 6% when, rupture tenacity and hardness drop and intensity rises, because TiN belongs to pottery and porcelain in TiC fund,be in, likelihood and TiC, Ni, Mo fashions solid solution (Fu of Ti, Ni, Mo)(C, N) the surface at TiN or TiC, namely so called " SS " : Remain possibly also come down to serve as horniness photograph. When it forms SS photograph, can prevent hardness photograph grain and felt photograph between of each element diffuse, rise to refine the action of grain. But the hardness of TiN itself relatively TiC is low, and decompose generation nitrogen easily below higher temperature, add in accept rice TiN so when the amount is larger, intensity, rupture tenacity and hardness all have drop phenomenon. By go up knowable, accept rice TiN adds pair of material to have certain modified effect, mechanical function has rise apparently, each peak value of mechanical function parts the accretion of corresponding and certain accept rice TiN is measured. Should add weight to be 6% ～ 8% when, can obtain relatively the integrated and mechanical function of actor. The research accept ground rice of dispersive craft has pink of TiN of 2 accept rice to compare the surface and fast face active iota granuality, high. In preparation process, because Fandewaersili and coulomb force exist between grain, grain coagulates extremely easily and, reunite form grain 2 times, make bead diameter increases form soft reunite and hard reunite, lose the function that exceeds fine grained place to have finally. Accordingly, must pass physics, chemical method to undertake finishing to body of accept ground rice, make its disperse adequately in liquid medium, in order to develop the property with due body of accept ground rice. Use the ball is ground and supersonic two kinds of dispersive craft. Bisect of value of PH of sort of activator of the dispersive character that considered to wait for organic matter to serve as dispersive medium with anhydrous alcohol and dispersive medium, surface and dosage, dispersive system, supersonic time comes loose the influence of the effect. Found out relatively the dispersive system constituent of actor and dispersive craft parameter. The TiC fund that 3 cutting function studies to use modified of self-restrained accept rice TiN belongs to pottery and porcelain but dislocation razor blade (TNU(G)N160412 and SNUN150416) two kinds, the YT15 with similar standards, YG8 but the lathe tool of make it of dislocation razor blade, undertake on CA6140 lathe sexual turning experiments contrasting. With cutting of razor blade of YT15, YG8 the comparison when 45 steel A.

Vc=200m/min, ap=0.

5, f=0.

1mm/rb.

Vc=200m/min, ap=0.

5, f=0.

5mm/r pursues wear curve of cutting tool of cutting tool of modified of 2 accept rice and YT15, YG8 is in cutting speed Vc=200m/min, back penetration of a cutting tool measures Ap=0.

5mm, feed F=0.

1mm/r and F=0.

Below the cutting condition of 5mm/r, get a picture the wear curve of 2. If plan institute is shown, cutting tool of accept rice modified is a lot of longer than life of YT15 cutting tool, when the cutting tool when feed is lesser in order to wear away form and invalidation: Become the cutting tool when feed is bigger with damaged shape be no longer in force. Is the reason with longer life of cutting tool of modified of accept rice TiN: ? The wear process that Σ of shaming provide for loves fund of IC of of approach of the  that suckle Qiong to belong to pottery and porcelain is felt wear away add horniness photograph flake. Because,this is Ti(C, hardness of TiC of main horniness photograph is more than N) radical in cermet YT is WC of photograph of the horniness in hard alloy. More because the affiliation of TiN was restrained,the element such as W, Ti passes Ni to diffuse to horniness photograph, can arise to refine the grain, result that improves hardness and strength apparently, it is good to because this is fought,grind bead tatty function. The thermal conductivity that TiC fund belongs to pottery and porcelain is good, the coefficient of friction with steel is lesser, cutting temperature is inferior, can decrease diffuse wear away, speed diffuses to be less than Co and WC in Xiang Gang of TiC of photograph of the felt photograph Ni that besides TiC fund belongs to pottery and porcelain, horniness. Additional, tiC and TiN can make more compact TiO2 film below high temperature, but Fu provides what the surface prevented each element further to diffuse at the knife. So cermet has TiC radical to be fought goodly diffuse wear away ability. Because the fine grain structure of the formation of TiO2 film and material also increased cutting tool,fight felt to wear away ability. In TiC fund the Ni in belonging to pottery and porcelain and TiN increased the corrosion resistance of material and chemical stability. By go up knowable, cutting tool of cermet of TiC of modified of accept rice TiN has very good integrated cutting property. In graph 2b, because feed is bigger, unit advocate the negative charge on cutting blade is bigger, and the intensity that TiC fund belongs to pottery and porcelain, tenacity fastens hard alloy than YT low, reason causes collapse blade. Belong to cutting of razor blade of pottery and porcelain with common TiC fund when 45 steel and casting pig compare A.

Cutting 45 steel B.

Cutting casting pig pursues modified of 3 accept rice is in to the influence of function of cutting of cermet cutting tool cutting speed Vc=200m/min, back penetration of a cutting tool measures Ap=0.

5mm, feed F=0.

Below the cutting condition of 1mm/r, machine 45 steel and casting pig respectively, the wear curve that gets 3 are shown pursueing. Be pleasant to the eye by the graph piece, cermet of accept rice modified fights collapse blade sex, wearability to all have bigger rise. Because in the accept rice with TiC dispersive crystal boundary TiN grain has a hammer to plunge into the action of crystal boundary,this is, those who prevent TiC grain is grown, have the effect of dispersion aggrandizement and fine brilliant aggrandizement namely. The tremendous surface of end of accept ground rice can provide function of agglomeration driving force, activated sintering, promote diffuse and drop firing temperature, be helpful for getting fine crystal structure. In the meantime, the TiN grain that comes loose partly inside TiC grain also has the effect of solid dissolve aggrandizement. From this knowable, cermet of accept rice modified is the new method that a kind of pottery and porcelain adds pliable but strong. Cutting quenchs the comparison when steel pursues cutting of a few kinds of 4 cutting tool quenchs the wear curve when steel pursues 4 it is cutting speed Vc=30m/min, back penetration of a cutting tool measures Ap=0.

5mm, feed F=0.

Cutting of below 1mm/r condition a few kinds of cutting tool quenchs 45 steel (classics intermediate frequency quenchs heat treatment, hardness is the wear curve of 55HRC) . By can see in the graph, below inferior cutting speed, fund of TiC of modified of accept rice TiN belongs to cutting of cutting tool of pottery and porcelain to quench wearability of the cutting tool when steel is good, life is longer. Ever did a test with cutting speed Vc>30m/min, cutting tool wears away quickly in cutting process, and with collapse blade invalidation. Do 4 epilogue show: through above cutting experiment? Fund of TiC of modified of IN of Zhu of arrogate to oneself belongs to pottery and porcelain but dislocation razor blade has hardness tall, high temperature capability and chemical stability are good, fight grind bead to wear away, felt wears away, diffuse wear away and chemical tatty capability is stronger wait for good character, although tenacity and intensity are a bit low, sex of the blade that fight collapse is not quite good, but the cutting property that leaves it in most circumstance relatively hard alloy cutting tool is good. The TiC fund of modified of accept rice TiN belongs to pottery and porcelain is 20 centuries material of a kind of when 90 time appear new-style cutting tool, have be able to bear or endure a series of advantages such as oxidation, high temperature resistant, wear-resisting, plus its density 6.

3 ～ 6.

8g/cm3, have hard alloy density only 13.

5 ～ 14.

The half of 8g/cm3, namely the powder of identical weight, cermet can acquire the 2 times product at hard alloy amount, use as cutting tool material prolonged service life not only, and reduced cost, manufacturing application has wide perspective. CNC Milling CNC Machining