There are several types of pipe tempering

Numutkeun syarat kinerja pipa baja GB / T9711.1, nurutkeun suhu tempering béda, bisa dibagi kana jenis handap tempering:

[1] Suhu rendah (150-250 derajat)
Struktur mikro anu diala ku tempering suhu rendah nyaéta martensit tempered.Tujuanana pikeun ngurangan setrés quenching jeung brittleness baja hardened dina premis ngajaga karasa tinggi sarta lalawanan maké tinggi, ku kituna ulah cracking atawa karuksakan prématur salila pamakéan.Ieu utamana dipaké pikeun sagala jinis parabot motong karbon tinggi, alat ukur, GB / T9711.1 pipa baja pipe, rolling arah sarta bagian carburizing, jsb, karasa sanggeus tempering umumna HRC58-64.

[2] Tempering suhu sedeng (250-500 derajat)
Mikrostruktur diala ku tempering sedeng nyaéta tempered trostite.Tujuanana nyaéta pikeun kéngingkeun kakuatan ngahasilkeun anu luhur, wates elastis sareng kateguhan anu luhur.Ku alatan éta, utamana dipaké pikeun sagala jinis GB / T9711.1 pipa baja pipe jeung perlakuan kapang panas, sanggeus tempering karasa sacara umum HRC35-50.

[3] Tempering suhu luhur (500-650 derajat)
Mikrostruktur diala ku suhu luhur tempering nyaeta tempered sortensite.Ilaharna, perlakuan panas digabungkeun jeung quenching na tempering disebut quenching na tempering.Tujuanana pikeun ménta sipat mékanis komprehensif hadé kakuatan, karasa, plasticity sarta kateguhan.Ku alatan éta, éta loba dipaké dina mobil, GB / T9711.1 pipeline pipa baja, parabot mesin jeung bagian struktural penting lianna, kayaning rod nyambungkeun, baud, gear jeung aci.Karasa sanggeus tempering umumna HB200-330.

Standar

API SPEC 5L -- Amérika Petroleum Institute Standar

GB / T9711 -- Standar Nasional Cina

Mangpaat

Dipaké pikeun oksigén, cai jeung minyak conveying pipe dina minyak bumi jeung industri gas alam

Produksi utama sasmita pipa baja:

B, X42, X52, X60, X65, X70 L245 L290 L320 L360 L390 L450 L485

Sipat mékanis

Standar	Tingkat produk	Kelas Baja	Kakuatan ngahasilkeun (min), Mpa	Kakuatan Tensile (MPa)
API 5L GB / T9711.2	PSL 1	A atanapi L210	210	335
		B atanapi L245	245	415
		x42 atanapi L290	290	415
		X46 atanapi L320	320	435
		X52 atanapi L360	360	460
		X56 atanapi L390	390	490
		X60 atanapi L415	415	520
		X70	483	565
	PSL 2	BR atanapi L245R	245~450	415~760
		X42R atanapi L290R	290~495	415~760
		BN atanapi L245N	245~450	415~760
		X42N atanapi L290N	290~495	415~760
		X46N atanapi L320N	320~525	435~760
		X52N atanapi L360N	360~530	460~760
		X56N atanapi L390N	390~545	490~760
		X60N atanapi L415N	415~565	520~760
		X65N atanapi L450N	425~566	525~760
		X70 atanapi L480	484~565	565~768
		X80	552~690	621~827

Méja Unsur Kimia dina Pipa

Tingkat produk	Kelas Baja	Komposisi Kimia,%
Tingkat produk	Kelas Baja	C	Mn	P	S	Jeung	IN	Nb	Of	CEpcm
PSL 1	B atanapi L245	≤0.28	≤1.20	≤0,030	≤0,030	-	-	-	-	-
	x42 atanapi L290	≤0.28	≤1.30	≤0,030	≤0,030	-	-	-	-	-
	X46 atanapi L320	≤0.28	≤1.40	≤0,030	≤0,030	-	-	-	-	-
	X52 atanapi L360	≤0.28	≤1.40	≤0,030	≤0,030	-	-	-	-	-
	X56 atanapi L390	≤0.28	≤1.40	≤0,030	≤0,030	-	-	-	-	-
	X60 atanapi L415	≤0.28	≤1.40	≤0,030	≤0,030	-	-	-	-	-
	X70	≤0.28	≤1.40	≤0,030	≤0,030	-	-	-	-	-
PSL 2	BR atanapi L245R	≤0.24	≤1.20	≤0,025	≤0,015	≤0.40	c	c	≤0.04	≤0.25
	X42R atanapi L290R	≤0.24	≤1.20	≤0,025	≤0,015	≤0.40	≤0.06	≤0.05	≤0.04	≤0.25
	BN atanapi L245N	≤0.24	≤1.20	≤0,025	≤0,015	≤0.40	c	c	≤0.04	≤0.25
	X42N atanapi L290N	≤0.24	≤1.30	≤0,025	≤0,015	≤0.40	≤0.06	≤0.05	≤0.04	≤0.25
	X46N atanapi L320N	≤0.24	≤1.40	≤0,025	≤0,015	≤0.40	≤0.07	≤0.05	≤0.04	≤0.25
	X52N atanapi L360N	≤0.24	≤1.40	≤0,025	≤0,015	≤0,45	≤0.10	≤0.05	≤0.04	≤0.25
	X56N atanapi L390N	≤0.24	≤1.40	≤0,025	≤0,015	≤0,45	≤0.10	≤0.05	≤0.04	≤0.25
	X60N atanapi L415N	≤0.24	≤1.40	≤0,025	≤0,015	≤0,45	≤0.10	≤0.05	≤0.04	-
	X65N atanapi L450N	≤0.24	≤1.40	≤0,025	≤0,015	≤0,45	≤0.10	≤0.05	≤0.04	-
	X70N	≤0.24	≤1.40	≤0,025	≤0,015	≤0,45	≤0.10	≤0.05	≤0.04	-
	X80	≤0.24	≤1.40	≤0,025	≤0,015	≤0,45	≤0.10	≤0.05	≤0.04