yuav ua li cas xaiv cov khoom siv hlau

1. Txiav txim siab txog daim ntawv thov

• Load xwm txheej:

  • Tensile zog, yield zog, hardness, qaug zog kuj, cuam tshuam toughness.

  • Piv txwv li: High-strength steel (xws li, ASTM A514 Cov Lus Qhia Tshwj Xeeb) rau cov qauv kab teeb, thaum softer steel (xws li, TIAB SA 1018) yog siv rau machining.

• Ib puag ncig:

  • Corrosion kuj (xws li, Stainless hlau 304/316 rau kev siv marine).

  • High-temperature resistance (xws li, alloy steels zoo li AISI 4130 rau boilers).

• Hnav Resistance:

  • Cov cuab yeej steel (D2, A2) los yog abrasion-resistant steels (AR400, AR 500) rau hnyav hnyav.

2. Nkag siab Cov Qeb Hlau

• Carbon Steel (Low/Medium/High Carbon):

  • Cov pa roj carbon tsawg (0.05-0.3% C, xws li AISI 1018): Zoo weldability, siv nyob rau hauv automotive lub cev.

  • Cov pa roj carbon nruab nrab (0.3-0.6% C, xws li AISI 1045): Sib npaug zog thiab ductility, siv nyob rau hauv shafts.

  • Cov pa roj carbon ntau (0.6-1.0% C, xws li AISI 1095): High hardness, siv nyob rau hauv riam thiab springs.

• Hlau alloy (eg., 4140, ib):

  • Muaj chromium, molybdenum, npib tsib xee rau kev txhim kho lub zog thiab toughness.

• Stainless hlau:

  • Austenitic (304, 316) Cov.: Corrosion-resistant, tsis-magnetic.

  • Martensitic (410, 440C): High hardness, siv nyob rau hauv cutlery.

  • Ferritic (430): Sib nqus, nruab nrab corrosion kuj.

• Cov cuab yeej hlau (eg., D2, H13, O1):

  • High hnav tsis kam rau kev txiav / tuag.

3. Xav txog cov txheej txheem tsim khoom

• Machineability: Free-machining steels (xws li, 12 l14) rau complex qhov chaw.

• Weldability: Tsawg-carbon steels weld yooj yim; high-carbon steels yuav xav tau ua ntej / tom qab cua sov.

• Formability: Cov hlau me me (piv txwv li, TIAB SA 1008) rau kev kos duab sib sib zog nqus.

4. Tshawb xyuas cov qauv & Muaj

• ASTM (A36, A516): Structural & siab nkoj steels.

• AISI/SAE (piv txwv li, 1045, 4140): Feem ntau siv hauv tshuab.

• EN Standards (piv txwv li, S355, 1.4301): European sib npaug.

5. Tus nqi vs

• Carbon steels yog pheej yig dua li alloy / stainless hlau.

• Sib npaug ntawm cov khoom xav tau thiab pob nyiaj siv.

Piv txwv xaiv Case:

1. Beam Structural (High Strength): ASTM A572 Qib 50.

2. Ncej (zoo toughness): AISI 4140 (Alloy hlau).

3. Kitchen Riam (Hardness): AISI 440C (Stainless).

4. Siab Vessel (Corrosion Resistance): ASTM A516 Qib 70.

Saum toj no yog rau cov khoom siv steel.

Rau peb cov khoom siv hlau mesh razor. peb ib txwm xaiv Q235 Q195 Tsawg carbon steel raws li cov khoom siv raw.

Tsuas yog cov mechanical zog, tus nqi kuj yog pheej yig. Yog li nws yog dav siv thiab nrov.

Peb cov hlau hlau, Mesh, laj kab, Barbed hlau yog nrov rau ntau qhov chaw.