1. Kev faib tawm thiab kev ua tau zoo ntawm cov raj tooj liab
1. Raws li cov khoom muaj pes tsawg leeg:
Cov raj tooj liab tuaj yeem muab faib ua cov raj tooj liab liab (TP2), tooj liab raj (H62 / H65 / H68), bronze hlab (QSn6.5-0.1), cov raj nyiaj npib tsib xee (Ni-Cu alloy), thiab lwm yam. lawv, cov hlab liab tooj liab muaj qhov zoo tshaj plaws thermal conductivity, tab sis kim dua; tooj dag raj muaj lub zog siab tab sis qis thermal conductivity; bronze hlab thiab npib tsib xee nyiaj raj muaj corrosion kuj zoo tab sis kev ua haujlwm tsis zoo[1].
2. Raws li cov txheej txheem ntau lawm:
Cov raj tooj liab tuaj yeem muab faib ua cov raj tsis muaj pa oxygen, cov raj tooj liab uas muaj cov pa oxygen, cov raj tooj liab sab hauv, thiab lwm yam. Oxygen-free copper tubes muaj siab purity thiab feem ntau yog siv los ua precision qhov chaw xws li capillaries; Oxygen-muaj tooj liab raj muaj lub zog nruab nrab thiab hardness, zoo weldability, thiab feem ntau yog siv los ua cov raj txuas; Internally threaded tooj liab raj muaj threads nyob rau hauv lub puab phab ntsa, uas muaj ib tug zoo txhim khu kev qha thaum tshav kub kub nyhuv[2].
3. Raws li hardness:
Cov raj tooj liab tuaj yeem muab faib ua peb pawg: lub xeev mos (O xeev), lub xeev ib nrab (1/2H), thiab lub xeev nyuaj (H xeev). O-state tooj liab raj yog mos, nrog zoo plasticity thiab ductility, tab sis tsis muaj zog; H-lub xeev tooj liab tubes muaj zog thiab hardness, tab sis tsis zoo plasticity; 1/2H tooj liab raj muaj lub zog nruab nrab thiab yas, kev ua haujlwm zoo, thiab yog thawj qhov kev xaiv rau cov kav dej tub yees [3].
2. Kev xav tau ntawm cov raj tooj liab rau lub tshuab tub yees
1. Cov ntaub ntawv xav tau
Cov tshuab tub yees feem ntau siv 1/2H-xeev tooj liab raj (TP2M), thiab lawv cov tshuaj muaj pes tsawg leeg yuav tsum ua raws li cov kev cai ntawm GB / T 17505-2010 [4]:
Cu + Ag Ntau dua lossis sib npaug rau 99.90%
{{0}}.015% Tsawg dua lossis sib npaug rau P Tsawg dua lossis sib npaug rau 0.040%
Cov ntsiab lus ntawm impurity cov ntsiab lus yuav tsum ua tau raws li cov hauv qab no: Bi Less dua los yog sib npaug rau {{0}}.001%, Sb Tsawg dua lossis sib npaug rau {{8} }.{{10}}02%, Raws li Tsawg dua lossis sib npaug rau 0.002%, Fe Tsawg dua lossis sib npaug 0.005%, Pb Tsawg dua lossis sib npaug 0.005%.
2. Mechanical zog
Cov khoom siv kho tshuab ntawm 1/2H tooj liab raj yuav tsum ua tau raws li cov cai hauv qab no [4]:
Tensile zog Rm Ntau dua los yog sib npaug rau 295MPa
Yield zog Rp0.2 Ntau dua lossis sib npaug li 255MPa
Elongation tom qab tawg A Ntau dua lossis sib npaug li 3%
