HSS yog dab tsi?

High-speed steel (HSS) yog tus qauv rau hlau txiav cov cuab yeej txij li xyoo 1830s.

High-speed steel (HSS) yog cov cuab yeej hlau uas muaj siab hardness, siab hnav tsis kam, thiab kub ua hauj. Nws tseem hu ua sharpened steel, uas txhais tau hais tias nws muaj peev xwm harden thiab nyob twj ywm ntse txawm tias txias nyob rau hauv cov huab cua thaum lub sij hawm quenching.

High-speed steel muaj feem pua ​​​​ntawm cov pa roj carbon ntau thiab lwm yam hlau. Xav tias muaj pes tsawg leeg yog cov yam ntxwv tseem ceeb tshaj plaws ntawm kev kub ceev hlau, HSS muaj tungsten, molybdenum, chromium, vanadium, cobalt, thiab lwm yam carbide-forming ntsiab nyob rau hauv tag nrho cov nyiaj li ntawm 10 mus rau 25% ntawm alloying ntsiab. Cov khoom sib xyaw no muab HSS nrog kev txiav classic thiab cov khoom siv kho tshuab xws li hnav tsis kam. Nyob rau hauv lub xeev quenched, hlau, chromium, ib co tungsten, thiab ib tug loj npaum li cas ntawm carbon nyob rau hauv high-ceev steel daim ntawv tsis tshua muaj zog carbides uas yuav txhim kho cov hlau hnav tsis kam.

Tsis tas li ntawd, HSS paub tias muaj kub kub hardness. Qhov no yog vim tungsten yaj nyob rau hauv lub matrix. Qhov kub hardness ntawm high-speed steel tuaj yeem ncav cuag 650 degrees. Tungsten, molybdenum, chromium, vanadium, cobalt, thiab lwm yam carbides muaj cov ntsiab lus uas pab tswj kom muaj zog hardness ntawm high-temperature txiav (kwv yees li 500 ° C).

Sib piv HSS rau cov cuab yeej carbon steel tuaj yeem paub qhov twg muaj qhov nyuaj dua ntawm chav tsev kub tom qab quenched thiab tempered ntawm qhov kub thiab txias. Tab sis thaum qhov kub siab tshaj 200 ° C, lub hardness ntawm cov cuab yeej carbon steel yuav poob sharply. Tsis tas li ntawd, qhov nyuaj ntawm cov cuab yeej carbon steel ntawm 500 ° C yuav poob mus rau qib zoo sib xws rau nws lub xeev annealed, uas txhais tau hais tias nws lub peev xwm los txiav hlau yog ploj tag. Qhov tshwm sim no txwv kev siv cov cuab yeej carbon steel hauv cov cuab yeej txiav. High-speed steels ua rau qhov tsis txaus ntawm cov cuab yeej carbon steel vim lawv qhov zoo kub hardness.

Cemented carbide yog superior rau HSS nyob rau hauv feem ntau. Yog tias koj txaus siab rau cov khoom lag luam tungsten carbide thiab xav paub ntau ntxiv thiab cov ntsiab lus, koj tuaj yeem tiv tauj peb hauv xov tooj lossis xa ntawv ntawm sab laug lossis xa US MAIL hauv qab ntawm nplooj ntawv. Peb tab tom tos ntsoov rau koj qhov kev nug.