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At present, that the material that the implement that high-speed steel is made into cuts has happened changes , uses a tool life to come down, require that high-speed steel must have higher high temperature hardness, the red hardness and tenacity come to satisfy implement cutting , these functions and the high-speed steel carbide homogeneity has direct something to do. Uneven rank of carbide is increasingly low, if 1 ~ grade-2, the carbide assumes trivial diffusion but homogeneous distribution , the high-speed steel sigmatism function finish exceeding. Reason why , the homogeneity studying and improving the high-speed steel carbide, till the purpose in improving whose function.The relation studying an impact of the cooling speed time high-speed steel chemical composition and solidification over Zhu state organization mainly at home and abroad and casting change , homogeneity and function processing handicraft and the high-speed steel carbide about pressure that state organizes during the period of high temperature warmup studies very few.The main body of a book be that the angle studies an impact of pressure treating over high-speed steel carbide homogeneity and function from hot working, the unit produces current situation and equipment condition according to , high-speed steel production capacity are big be General Availability M2 , W9 steel and M42 high-performance steel, under the situation of ensuring that high-speed steel casts state organization regularly, mass has brought forward suggestion to carbide in improving high-speed steel how, and has been used for reality in my company giving birth to a child by the fact that the aluminium carrying out an experiment on that 3 , summing up analysis: The steel ingot heats the temperature to M2 being most ideal time 1160 OC , upper limit are 1180 OC; Since W9 boundary W is to be that centre and M42 are steel by M0 with W-M0, cast state being going to spend treatment process the homogeneity before forging warmup , may there be an effect’s improved carbide rank; Under swear to cast state organization condition regularly, the pressure being in progress according to the best warmup temperature processes, the carbide is followed to forge and stamp unevenly ratio enhancing but reducing , is forge and stamp than in 15 ~ between 62, uneven carbide change is obvious; Forge and stamp be less than changing in 6.9 ~ between 15.0 , already have but a marked improvement, correct M2 steel scratch; High-speed steel cogging-down equipment forges cogging-down many , accurate had better forge the cogging-down carbide quickly scattering well , forge lumber accurate should rather for rolling mill lumber carbide to finish scattering , differ by 0.5 step or so without exception, cause is that the rolling mill adopt round box method of just flat water chestnut method of elliptic vessel ellipse pass system , every says that overturn 90 degree time , entire cross section deformation is homogeneous in the process of deformation , adopt but to forge cogging-down , rolling mill lumber quickly therefore demanding the peculiar consumer to W9 and M42 steel or to the carbide, And increase a forging ratio; Cogging-down one is igneous forge material in two fire , three igneous grade-0.2 sharing a carbide not being lower than cogging-down on degree of homogeneity, the decrease forges reason why to the full in responding to in cogging-down process striking a light time, time of condition goes down cogging-down and lumber , ensures that the carbide satisfies a request in the fewest fire.Handicraft scheme that the problem studies in short , originally, the various deformation handicraft has been put into effect without exception in the company , has got fine effect, the consumer requires that the material choosing the best ingot base deploys , adopt the best handicraft route and deformation way according to diversity to the carbide, is to have satisfied the consumer need , have having come true company beneficial result maximizes , has obvious beneficial result.
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