Cov kev xav tau hardness no ua kom ntseeg tau tias cov cuab yeej txiav tuaj yeem tswj tau qhov ntse thaum lub sijhawm txiav, txiav cov khoom ua haujlwm zoo, tiv taus hnav, thiab txuas ntxiv lawv lub neej kev pabcuam. Hauv kev siv tswv yim, nws yog ib qho tsim nyog los xaiv cov cuab yeej tsim nyog thiab hardness raws li cov khoom siv ua haujlwm thiab kev txiav.
Ⅰ. High hardness thiab hnav tsis kam:
1. Lub hardness ntawm txiav ib feem ntawm lub cuab yeej yuav tsum siab tshaj li ntawm cov khoom siv workpiece los xyuas kom meej txiav zoo.
2. Qhov siab dua qhov hardness ntawm cov khoom siv, qhov zoo dua nws hnav tsis kam, yog li ncua kev pab cuam lub neej ntawm cov cuab yeej.
3. Cov kev cai tshwj xeeb: Lub hardness ntawm cov khoom siv ntawm chav tsev kub yuav tsum siab tshaj HRC62.
II. Kev sib raug zoo ntawm hardness thiab hnav tsis kam, lub zog, thiab toughness:
1. Txiav cov cuab yeej tsis tsuas yog xav tau siab hardness, tab sis kuj muaj zog txaus thiab toughness los tiv thaiv lub siab thiab cuam tshuam thaum lub sij hawm txiav, tiv thaiv ntug chipping thiab breakage.
2. Lub zog yog feem ntau qhia los ntawm dabtsi yog khoov lub zog, thiab toughness yog qhia los ntawm tus nqi cuam tshuam.
III. Hardness Cov yam ntxwv ntawm cov khoom sib txawv ntawm cov cuab yeej txiav:
1. High-ceev steel: Nws muaj thermal stability, lub zog thiab toughness, nrog rau tej yam hardness thiab hnav tsis kam, thiab yog haum rau kev ua tsis yog -ferrous hlau thiab ntau yam ntaub ntawv hlau.
2. Cemented carbide: Nws muaj hardness heev thiab hnav tsis kam. Nws qhov kev ua tau zoo yog zoo dua li ntawm siab -ceev steel, thiab nws cov durability yog ob peb mus rau kaum ob lub sij hawm ntawm siab -ceev steel, tab sis nws cov cuam tshuam toughness kuj tsis zoo.
3. Coated inserts: Coated los ntawm CVD los yog PVD txoj kev los txhim kho lub durability ntawm cemented carbide cov cuab yeej. CVD txheej yog TiC, thiab PVD txheej yog TiN, TiAlN, thiab Ti (C, N).
4. CBN (Cubic Boron Nitride): Nws hardness thiab thermal conductivity yog thib ob tsuas yog pob zeb diamond. Nws muaj cov thermal stability thiab zoo tshuaj stability, thiab yog haum rau ua quenched steel, nyuaj cam khwb cia hlau, thiab lwm yam.
5. PCD (Polycrystalline Pob Zeb Diamond): Thaum siv los ua cov cuab yeej txiav, nws yog sintered rau ntawm cov cemented carbide substrate thiab tuaj yeem ua precision machining ntawm siab - cov ntaub ntawv hardness xws li cemented carbide thiab ceramics.
Ⅳ.Hardness Sawv cev hauv ISO Indexable Insert Material Classification Method:
1. steel qhov chaw: P05, P25, P40. Tus naj npawb tsawg dua, qhov nyuaj ntawm cov hniav, qhov zoo dua qhov hnav tsis kam, tab sis qhov tsis zoo ntawm qhov cuam tshuam.
2. Stainless hlau: M05, M25, M40, nrog rau kev faib cov logic zoo ib yam li cov hlau qhov chaw.
3. Cam khwb cia hlau: K05, K25, K30, nrog rau kev faib cov logic zoo ib yam li cov hlau qhov chaw.
