China DIN7991 Hex Socket Countersunk Screw Grade Carbon Karfe Zinc Plated Grade 8.8 10.9 masana'antun da masu kaya

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

Takaitaccen Bayani:

Saukewa: DIN7991

Sunan samfur: Hex Socket Flat Head Screw

Mabuɗin Kalmomi: DIN7991, Hex Socket Flat Head Screw, Countersunk Screw

Girman: M3-M42

Abu: 10B21, 35CrMo, 40Cr

Matsayin Qarfi: 8.8, 10.9

Maganin Sama: Farar Zinc Plated

Tsawon Zaren: Cikakkun Zaren/Rabin Zaren

Shiryawa: Bag/Carton/Kayan katako

Wasu fasaloli: Ba da alamar kai na musamman

Aika mana imel

Cikakken Bayani

Tags samfurin

Bayani

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10000+ SKU a cikin sito

Mun ƙaddamar da abubuwan RTS:

70% abubuwan da aka kawo cikin kwanaki 5

80% abubuwan da aka kawo cikin kwanaki 7

90% abubuwan da aka kawocikin kwanaki 10

Babban umarni, da fatan za a tuntuɓi sabis na abokin ciniki

d		M3	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24
d
P	Fita	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3
α	(+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 ml ≤ 200	/	/	/	24	28	32	36	40	44	48	52	56	60
	L ＞200	/	/	/	/	/	45	49	53	57	61	65	69	73
dk	Max=Na'am	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=Na'am	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	Na suna	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=Na'am	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

Cikakken bayanin

Babban ƙarfi fasteners za su samar da crispness lokacin da galvanized. Bukatar kulawa ta musamman.

Ruwan ruwa na hydrogen yawanci ana siffanta shi da jinkirin karaya a ƙarƙashin damuwa. An sami maɓuɓɓugan mota, wanki, sukurori, maɓuɓɓugan ruwa da sauran sassan galvanized, a cikin 'yan sa'o'i bayan an rushe taro, raguwar kashi 40% ~ 50%. A cikin tsarin yin amfani da sassa na musamman da aka yi da cadmium, an sami karyewar batch, kuma an warware wata matsala mai mahimmanci ta ƙasa kuma an tsara tsari mai tsauri. Bugu da kari, akwai wasu hydrogen embrittlement ba ya nuna jinkirta karaya sabon abu, kamar: electroplating hanger (karfe waya, jan karfe waya) saboda da yawa sau na electroplating da pickling plating, hydrogen shigar ne mafi tsanani, sau da yawa ya bayyana a amfani da ninki zai. faruwa ga karaya sabon abu; Maƙarƙashiyar bindigar, bayan sau da yawa na chroming, ya faɗi ƙasa ya karye; Wasu sassan da aka kashe (babban damuwa na ciki) za su fashe yayin da ake tsinke. Waɗannan sassan suna da tsananin hydrogenated kuma suna fashe ba tare da damuwa na waje ba, waɗanda ba za a iya amfani da su ba don dawo da taurin asali ta rashin ruwa.

Mafi girman ƙarfin abu, mafi girman haɓakar haɓakar hydrogen. Wannan shine ainihin ra'ayi wanda dole ne a fayyace shi ta hanyar masu fasaha na jiyya a saman yayin tattara ƙayyadaddun tsari na lantarki. Karfe tare da ƙarfi mai ƙarfi σb> 105kg / mm2 da ake buƙata ta ƙa'idodin ƙasa da ƙasa ya kamata a shayar da damuwa da pre-plating da kuma bayan-plating dehydrogenation magani daidai. Masana'antar zirga-zirgar jiragen sama ta Faransa tana buƙatar daidaitaccen maganin dehydrogenation don sassan ƙarfe tare da ƙarfin yawan amfanin ƙasa σs>90kg/mm2.

Saboda kyakkyawar ma'amala tsakanin ƙarfin ƙarfe da taurin, ya fi fahimta da dacewa don yin hukunci akan yanayin haɓakar hydrogen embrittlement na abu ta ƙarfi fiye da ƙarfi. Domin cikakkiyar zane-zanen samfuri da aikin injin ya kamata a yi alama da taurin ƙarfe. A cikin na'urar lantarki, mun gano cewa taurin karfe a kusa da HRC38 ya fara nuna hadarin karaya na hydrogen embrittlement. Don sassa sama da HRC43, ya kamata a yi la'akari da dehydrogenation bayan plating. Lokacin da taurin ya kasance game da HRC60, dole ne a yi maganin dehydrogenation nan da nan bayan jiyya na saman, in ba haka ba sassan karfe za su fashe a cikin 'yan sa'o'i.