Kina DIN7991 Hex Socket Countersunk Screw Grade Carbon Steel Zinc Plated Grade 8.8 10.9 nā mea hana a me nā mea kūʻai |ʻO Hongji

DIN7991 Hex Socket Countersunk Screw Grade Carbon Steel Zinc Plated Grade 8.8 10.9

ʻO ka wehewehe pōkole:

Kūlana: DIN7991

Inoa Huahana: Hex Socket Flat Head Screw

Hua'ōlelo Nui: DIN7991, Hex socket flat head screw, Countersunk Screw

Nui: M3-M42

Mea: 10B21, 35CrMo, 40Cr

Papa Ikaika: 8.8, 10.9

Lapaʻau ʻili: Keʻokeʻo Zinc Plated

Loihi Uila: Loko piha/ Loko Half

Hoʻopili: ʻeke / pahu pahu / pahu lāʻau

Nā hiʻohiʻona ʻē aʻe: Hāʻawi i ka hōʻailona poʻo maʻamau

E hoʻouna i ka leka uila iā mākou

Huahana Huahana

wehewehe

AIKIPane

AIKIHua'ōlelo

AIKIHāʻawi

MAKAUKAU E HOOKAPU

10000+ SKU i loko o kahi waihona

Hāʻawi mākou i nā mea RTS:

70% nā mea i hāʻawi ʻia i loko o 5 mau lā

80% nā mea i hāʻawi ʻia i loko o 7 lā

90% nā mea i hāʻawi ʻiai loko o 10 lā

Nā kauoha nui, e ʻoluʻolu e kelepona i ka lawelawe mea kūʻai aku

d		M3	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24
d
P	Pitch	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3
α	tol.(+2)	90°	90°	90°	90°	90°	90°	90°	90°	90°	90°	90°	60°	60°
b	L≤125mm	12	14	16	18	22	26	30	34	38	42	46	50	54
	125＜L ≤ 200	/	/	/	24	28	32	36	40	44	48	52	56	60
	L＞200	/	/	/	/	/	45	49	53	57	61	65	69	73
dk	Max=Nominal	6	8	10	12	16	20	24	27	30	33	36	36	39
dk	Min	5.7	7.64	9.64	11.57	15.57	19.48	23.48	26.48	29.48	32.38	35.38	35.38	38.38
ds	Max=Nominal	3	4	5	6	8	10	12	14	16	18	20	22	24
ds	Min	2.86	3.82	4.82	5.82	7.78	9.78	11.73	13.73	15.73	17.73	19.67	21.67	23.67
e	Min	2.3	2.87	3.44	4.58	5.72	6.86	9.15	11.43	11.43	13.72	13.72	16	16
k	Max	1.7	2.3	2.8	3.3	4.4	5.5	6.5	7	7.5	8	8.5	13.1	14
s	Nominal	2	2.5	3	4	5	6	8	10	10	12	12	14	14
	Min	2.02	2.52	3.02	4.02	5.02	6.02	8.025	10.025	10.025	12.032	12.032	14.032	14.032
	Max	2.1	2.6	3.1	4.12	5.14	6.14	8.175	10.175	10.175	12.212	12.212	14.212	14.212
t	Max=Nominal	1.2	1.8	2.3	2.5	3.5	4.4	4.6	4.8	5.3	5.5	5.9	8.8	10.3
t	Min	0.95	1.55	2.05	2.25	3.2	4.1	4.3	4.5	5	5.2	5.6	8.44	9.87

wehewehe kikoʻī

ʻO nā mea hoʻopaʻa ikaika kiʻekiʻe e hana i ka crispness i ka wā i hoʻopaʻa ʻia.Pono ka nānā kūikawā.

Hōʻike pinepine ʻia ka embrittlement hydrogen e ka haʻi lohi ma lalo o ke kaumaha.Aia nā pūnāwai kaʻa, nā mea holoi, nā ʻili, nā puna wai a me nā ʻāpana galvanized ʻē aʻe, i loko o kekahi mau hola ma hope o ka haki ʻana o ka hui, ʻo ka haʻihaʻi o 40% ~ 50%.I ke kaʻina hana o ka hoʻohana ʻana i nā ʻāpana cadmium-plated o kahi huahana kūikawā, aia nā ʻāpana ʻōpala, a ua hoʻoholo ʻia kahi pilikia kī kī aupuni a ua hoʻokumu ʻia kahi kaʻina dehydrogenation koʻikoʻi.Eia kekahi, aia kekahi mau hydrogen embrittlement ʻaʻole hōʻike i ka lohi ʻana o ka haki ʻana, e like me: electroplating hanger (steel wire, copper wire) ma muli o nā manawa he nui o ka electroplating a me ka pickling plating, ʻoi aku ka koʻikoʻi o ke komo ʻana o ka hydrogen, ʻike pinepine ʻia i ka hoʻohana ʻana i kahi paʻi. hiki mai ke ano hakihaki;ʻO ka mandrel o kahi pū pana, ma hope o kekahi mau manawa o ka chroming, hāʻule i ka honua a haki;ʻO kekahi mau ʻāpana kinai (ke koʻikoʻi kūloko nui) e pohā i ka wā pickling.Hoʻohana nui ʻia kēia mau ʻāpana me ka ʻole o ke koʻikoʻi o waho, ʻaʻole hiki ke hoʻohana hou ʻia e hoʻihoʻi i ka paʻakikī kumu ma o ka dehydrogenation.

ʻO ke kiʻekiʻe o ka ikaika waiwai, ʻoi aku ka nui o ka naʻau o ka hydrogen embrittlement.He manaʻo kumu kēia e pono e wehewehe ʻia e nā ʻenehana lapaʻau i ka wā e hōʻuluʻulu ai i nā kikoʻī kaʻina hana electroplating.ʻO nā kila me ka ikaika tensile σb>105kg/mm2 i koi ʻia e nā kūlana honua pono e hoʻokau ʻia i ke koʻikoʻi pre-plating a me ka mālama dehydrogenation post-plating e like me ia.Pono ka ʻoihana mokulele Farani i ka mālama dehydrogenation kūpono no nā ʻāpana kila me ka ikaika hua σs>90kg/mm2.

Ma muli o ka pilina maikaʻi ma waena o ka ikaika kila a me ka paʻakikī, ʻoi aku ka intuitive a maʻalahi hoʻi e hoʻokolokolo i ka naʻau hydrogen embrittlement o nā mea ma ka paʻakikī ma mua o ka ikaika.No ka mea, pono ke kaha ki'i huahana a me ka hana machining me ka paakiki kila.I ka electroplating, ua ʻike mākou ua hoʻomaka ka paʻakikī o ke kila a puni ka HRC38 e hōʻike i ka pilikia o ka haki ʻana o ka hydrogen embrittlement.No nā ʻāpana kiʻekiʻe aʻe ma mua o HRC43, pono e noʻonoʻo ʻia ka dehydrogenation ma hope o ke kau ʻana.Ke pili ka paʻakikī i ka HRC60, pono e hoʻokō koke ʻia ka mālama dehydrogenation ma hope o ka mālama ʻana i ka ʻili, inā ʻaʻole e haki nā ʻāpana kila i loko o kekahi mau hola.