MIM Hmoov Metallurgy Txhaj Ntsia Hlau Teeb

MIM Powder Metallurgy Injection Screw Barrel Set
MIM Powder Metallurgy Injection Screw barrel 02 - DW Machinery
MIM Powder Metallurgy Injection Screw barrel 03 - DW Machinery

MIM Hmoov Metallurgy Txhaj Ntsia Hlau Teeb

Tshwj xeeb tsim ntsia hlau chim teem rau MIM hmoov metallurgy txhaj.
Engineered tshwj xeeb rau 55-70 vol% hlau hmoov feedstocks.
Tsis yog "nitride ntsia hlau, hloov me ntsis" — lub hom phiaj - ua lub plawv rau MIM.
L/D 20:1–22:1 CR ≈ 1.5–2.0 HRC 60–65 Φ20–120 mm 3–8 × Lub Neej

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Khoom Taw qhia

MIM Hmoov Metallurgy Txhaj Ntsia Hlau Teeb

1. Qhov teeb meem nrog Standard Screws hauv MIM

Hlau hmoov feedstocks (316L, 17-4PH, tungsten, titanium) muaj 55-70 vol% nyuajhmoov hais.

Khiav lawv los ntawm tus qauv nitrided yas ntsia hlau tsim pebkwv yees tsis ua hauj lwm:

1.1 Abrasive hnav - flutes scraped liab qab

Nitrided txheej (38CrMoAlA, ~ HRC 60) hnav hauv 30,000-60,000 txhaj tshuaj.

Result: shot-volume drift, green-part weight spread >0.5 g.

1.2 Shear overheating - binder degradation

Compression ratio tau theej los ntawm cov yas ntsia hlau (2.5+) ua kom muaj cua sov ntau dhau.

Cov txiaj ntsig: binder decomposition, hmoov-binder sib cais, dub me ntsis, sinteringtawg.

1.3 Acid corrosion - chim qaug dab peg

Debinding - hom binders tso tawm cov kua qaub kua qaub ntawm qhov kub thiab txias.

Qhov tshwm sim: zoo tib yam nitrided steel xeb, kos lub nplhaib seizes, unplanned downtime

MIM Powder Metallurgy Injection Screw barrel 05 - DW Machinery

2. Cov ntsiab lus tseem ceeb

Cheebtsam	Kev teeb tsa	Khoom siv / Parameter	daws
Ntsia Hlau Lub Cev	3-zone low-shear	L/D 20–22\|CR 1.5–2.0\|Pub 50% / Compress 35% / Meter 15%	Maj mam plasticizing, tsis muaj kev sib cais
Davhlau Hardface	Dual -alloy tsuag / Khoom carbide	WC-35% Co tsuag HRC 60-65; los yog YG8 / YG10X khoom carbide HV 1400-1550	Abrasion kuj nyob rau hauv cov hmoov hlau
chim	Bimetallic centrifugal casting	40Cr substrate + WC-Co hauv ob sab phlu 2.5–3 mm\|HRC 60–64	Lub tog raj kheej phab ntsa tsis zoo 3-8 × ntev
Pem hauv ntej -Kit End	Anti- rov qab foob pob hluav taws	Dual -alloy check nplhaib + thrust washer, precision lapped (gap<0.13 mm @ Φ22)	Zero backflow, ruaj khov ntsuab - qhov hnyav
Tau tshaj Feedstocks	Stainless / Tungsten / Titanium / CIM	316L / 17-4PH / Fe-Ni / W-Cu / Ti6Al4V / Ceramic CIM	Wax-raws li 130–170 degree\|POM catalytic 170-200 degree

Nco tseg: Tsis tu ncua siab -temp/high-siab (stainless MIM) → YG8 (nyuaj, tuav profile). Coarse W

hmoov / loj txoj kab uas hla / 冲击-prone → YG10X (tougher, resists chipping). Lub nplhaib tuaj yeem siv tau

YG15 / YG20C rau kev cuam tshuam.

3. Tsim Paub meej

3.1 Peb -zone Low- compression Screw Profile

Pub cheeb tsam: sib sib zog nqus channel rau ruaj khov conveying. Compression cheeb tsam: maj mam ntiavflights rau maj mam compaction thiab venting. Metering cheeb tsam: ntiav channel kom meejvolumetric koob tshuaj. Tsis muaj kauj ruam compression qiv los ntawm cov yas yas - qhov no khaws ciahauv zos shear kub nce qis dua 10 . degree

3.2 Bimetallic Barrel Hla-section

40Cr substrate muab lub zog torsional. Sab hauv bore yog centrifugal - nrum nrog WC -Co alloytxheej (ib sab 2.5-3 hli), metallurgically bonded - tsis muaj delamination. Piv nrogib leeg -nitride chim: hnav tsis kam ↑5–6 ×, acid-corrosion kuj ↑3 ×.

3.3 Anti-backflow Ntsia Hlau Ntsis (Rocket Head)

Kos lub nplhaib + thrust washer + foob pob ua ntxaij taub hau, precision-lapped raws li ib tug matched teeb. Zero backflowthaum txhaj tshuaj thiab tuav - theem siab. Tseem ceeb rau siab -viscosity MIM feedstocks: alub nplhaib txheem yuav cia kev txhaj tshuaj kom lwj, ua rau thawj zaug - mus rau - qhov kawg ntawm qhov hnyav hloov pauv>0.5 g

MIM Powder Metallurgy Injection Screw barrel 04 - DW Machinery

4. Khoom Qib (Carbide Selection Guide)

Qib	Kev sib xyaw	Hardness	TRS (MPa)	Zoo tshaj rau
YG 8	WC-8% Co	HRA ≈ 89.5 / HV ≈ 1400	Ntau dua lossis sib npaug rau 3500 (zoo- nplej)	Default ntsia hlau lub cev, 316L / 17-4PH
YG10 / YG10X	WC-10% Co (zoo)	HRA ≈ 90.5–91.5 / HV 1500–550	Tsawg dua los yog sib npaug li 4000	Precision me me screws (Φ18–40), W-Cu / CIM
YG15 / YG20C	WC-15–20% Co	HRA ≈ 86–88 / HV ≈ 1100–1200	Ntau dua lossis sib npaug li 4000	Kos lub nplhaib / foob pob ua ntxaij taub hau (qhov cuam tshuam)

Nto alloy lwm txoj kev: WC-35% (Co/Ni/Cr) self-fluxing spray rau SKD61 / 42CrMo

substrate, HRC 60–65 - tus nqi tshaj plaws -kev xaiv lub ntsiab zoo rau MIM lub luag haujlwm.

5. Lifespan & Nqi sib piv

Kev daws	Est. Lub neej (316L feedstock)	Tus nqi txheeb ze	Ton-tus nqi tu
Txheem 38CrMoAlA nitrided	30,000-60,000 txhaj tshuaj	1×	Siab (hloov pauv ntau zaus)
Dual -alloy tsuag ntsia hlau + bimetallic chim (cov khoom no)	200,000-400,000 txhaj tshuaj	1.6–2.2×	Tsawg
Khoom YG8 / YG10X carbide ntsia hlau + alloy liner	500, 000+ txhaj	3.5–5×	Tsawg tshaj plaws (qib premium)

6. Qhov twg nws twb khiav lawm

Consumer Electronics

▸ Saib cov rooj plaub, lub koob yees duab nplhaib, pob khawm (316L)

Cov cuab yeej kho mob

▸Forceps, orthopedic screws, kho hniav brackets (17-4PH, Ti)

Automotive

▸ Turbocharger hniav, sensor vaj tse (Fe-Ni)

Kev Tiv Thaiv / Cov Cuab Yeej

▸ Tungsten- tooj liab counterweights, titanium aerospace qhov chaw

MIM Powder Metallurgy Injection Screw barrel 06 - DW Machinery

7. Cov Cai Ua Haujlwm (rau lub neej siab tshaj)

Txoj cai	Paub meej
Preheat	Nqa lub thoob rau qhov kub (feem ntau 170-200 degree), ces tsau 10 feeb ua ntej ntsia hlau tig. Kev pib txias yog txwv tsis pub.
Tshem tawm	Thaum hloov cov qauv, tshem tawm nrog siab -viscosity PP los yog kev tu vaj tse. Tsis muaj prying.
Hnav Saib Xyuas	Measure screw OD / clearance regularly. At Φ22, replace full set when OD wear >0.20 mm or ring gap >0.13 hli - tsis txhob patch nrog lub nplhaib tshiab ib leeg.
Txhaj tshuaj	Nyiam MIM-mob txhaj tshuaj: kaw- voj metering, qis-shear ntsia hlau tsav, xaiv qhov cua qhov zawj ze ntawm lub hopper los tiv thaiv cavitation.

8. Customization txheej txheem

Kauj ruam	Kev ua
1	Muab cov qauv ntsia hlau kos duab lossis lub nkoj hnav ib feem rau thim rov qab- engineering / ntsuas.
2	Qhia rau peb: hmoov qib, binder system, txhaj tshuaj tshuab hom & qauv, ib qho - qhov hnyav.
3	Peb muab lub hau ntswj geometry + alloy tswv yim (PDF). Koj tshuaj xyuas thiab paub meej.
4	Tus me nyuam nyob rau hauv 15-25 hnub, nrog hardness test report thiab clearance record.

Cim npe nrov: Mim hmoov metallurgy txhaj tshuaj zawv plaub hau teeb, Tuam Tshoj mim hmoov metallurgy txhaj tshuaj ntsia hlau chim teeb manufacturers, lwm tus neeg, Hoobkas

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