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1. 发明专利

DE3720144C2 未知
公开(公告)号：DE3720144C2
公开(公告)日：1994-11-24
申请号：DE3720144
申请日：1987-06-16
申请人： MITSUBISHI MATERIALS CORP , NIPPON STEEL CORP
发明人： YATSUZUKA TAKASHI , OHBA TETSUYA , TANABE KOUJI , KOJIMA TATSUO , KOBAYASHI TATSUNOBU , KATOU KOUKI
IPC分类号： B21B27/03 , B21B27/02 , B21B31/07 , F16C13/00
摘要： A roll for a mill includes a roll shaft having a tapered portion disposed intermediate opposite ends thereof. The tapered portion has an outer peripheral surface tapering axially of the roll shaft. A ring of a wear-resistant material is disposed around the tapered portion of the roll shaft. A tubular sleeve having an inner peripheral surface tapering axially thereof is press-fitted between the tapered portion of the roll shaft and the ring to retain the ring in place on the roll shaft for rotation therewith. The sleeve includes an inner groove formed in the inner peripheral surface thereof and a passageway formed therethrough. The passageway is communicated with the inner groove so that pressurized oil is supplied through the passageway into the inner groove.

2. 发明专利

DE1533252B1 未知
公开(公告)号：DE1533252B1
公开(公告)日：1973-04-05
申请号：DE1533252
申请日：1966-10-26
申请人： NIPPON STEEL CORP
发明人： HOTTA TOMOMICHI , MURAKI JUNJIRO , KANAZAWA SHOGO , SAKAI TOSHIKAZU , NAKASHIMA AKIRA , TANABE KOUJI , NAKAZAWA SUSUMU
IPC分类号： C22C38/12 , C22C39/50

3. 发明专利

DE3720144A1 未知
公开(公告)号：DE3720144A1
公开(公告)日：1987-12-23
申请号：DE3720144
申请日：1987-06-16
申请人： MITSUBISHI METAL CORP , NIPPON STEEL CORP
发明人： YATSUZUKA TAKASHI , OHBA TETSUYA , TANABE KOUJI , KOJIMA TATSUO , KOBAYASHI TATSUNOBU , KATOU KOUKI
IPC分类号： B21B27/03 , B21B27/02 , B21B31/07 , F16C13/00
摘要： A roll for a mill includes a roll shaft having a tapered portion disposed intermediate opposite ends thereof. The tapered portion has an outer peripheral surface tapering axially of the roll shaft. A ring of a wear-resistant material is disposed around the tapered portion of the roll shaft. A tubular sleeve having an inner peripheral surface tapering axially thereof is press-fitted between the tapered portion of the roll shaft and the ring to retain the ring in place on the roll shaft for rotation therewith. The sleeve includes an inner groove formed in the inner peripheral surface thereof and a passageway formed therethrough. The passageway is communicated with the inner groove so that pressurized oil is supplied through the passageway into the inner groove.

4. 发明专利

JPS56133448A STEEL FOR LOW TEMPERATURE VESSEL WITH IMPROVED BRITTLE RUPTURE CAUSING PROPERTY AT WELD HEAT-AFFECTED ZONE 失效
公开(公告)号：JPS56133448A
公开(公告)日：1981-10-19
申请号：JP3641280
申请日：1980-03-22
申请人： NIPPON STEEL CORP
发明人： GONDOU HISASHI , YAMATO KAZUNARI , TAKEDA TETSUJIROU , TANABE KOUJI , HORITANI TAKAO
IPC分类号： C22C38/00 , C22C38/06 , C22C38/08 , C22C38/12
摘要： PURPOSE:To improve a brittle rupture causing property of a steel for a low temp. vessel at the weld heat-affected zone by restricting the relation among Al, O and N in the steel to a specified range. CONSTITUTION:C, Si and Mn as basic components of a steel for a low temp. vessel are reduced, further the P content is restricted, and the Al, P and N contents are also restricted to suitable ranges. In addition, Ni and Mo are combinedly added to the steel within certain upper limits. The resulting steel contains =AlX76/ 54/(O+N)>=1.7, O and N in the steel are fixed as Al2O3 and AlN, respectively. Thus, the brittle rupture causing properties of the steel at the weld heat-affected zone are improved.

5. 发明专利

JPS5215414A HOT ROLLED STEEL FOR USE IN WELDING WITH IMPROVED ANTIILAMELLAR REAR P ROPERTY 失效
公开(公告)号：JPS5215414A
公开(公告)日：1977-02-05
申请号：JP9146275
申请日：1975-07-26
申请人： NIPPON STEEL CORP
发明人： KADO SATOSHI , YAMATO KAZUNARI , INOUE HISASHI , TANABE KOUJI
IPC分类号： C22C38/00 , C22C38/28 , C22C38/60
摘要： PURPOSE:Hot rolled steel for use in welding with improved anti-lamellar tear property.

6. 发明专利

JPS6112820A Manufacture of low-alloy nickel steel having high strength and toughness 失效
标题翻译：具有高强度和粗糙度的低合金镍钢的制造
公开(公告)号：JPS6112820A
公开(公告)日：1986-01-21
申请号：JP13352784
申请日：1984-06-28
申请人： Nippon Steel Corp
发明人： YANO SEINOSUKE , OKAMURA YOSHIHIRO , KAKO KATSUO , INOUE HISASHI , TANABE KOUJI
IPC分类号： C21D8/00
CPC分类号： C21D8/005
摘要： PURPOSE:To manufacture a low-alloy Ni steel having 80-110kg/mm. tensile strength and high toughness by subjecting a low-alloy Ni steel slab to soln. heat treatment, hot rolling under specified conditions, rapid cooling and tempering. CONSTITUTION:A low-alloy steel slab contg. 1.5-8wt% Ni is subjected to soln. heat treatment. The slab is hot rolled at 900-1,150 deg.C heating temp. and 700- 1,000 deg.C finishing temp., and it is rapidly cooled at once and then tempered at the A1 point or below. The desired low-alloy Ni steel is obtd. by combining soln. heat treatment with thermo-mechanical treatment as mentioned above.
摘要翻译：目的：通过对低合金镍钢板进行溶剂处理，制造出具有80-110kg / mm 2的拉伸强度和高韧性的低合金Ni钢。热处理，在规定条件下进行热轧，快速冷却回火。构成：低合金钢板 1.5-8wt％Ni经过溶胶。热处理。板坯在900-1,150℃加热温度下热轧。和700-1000℃的精加工温度，并立即冷却，然后在A1点或更低温度回火。所需的低合金Ni钢是有效的。通过组合soln。如上所述用热机械处理进行热处理。

7. 发明专利

JPS60228618A METHOD FOR PREVENTING LOCAL CORROSION OF WELDING HEAT AFFECTED PART 失效
公开(公告)号：JPS60228618A
公开(公告)日：1985-11-13
申请号：JP8204384
申请日：1984-04-25
申请人： NIPPON STEEL CORP
发明人： INOUE HISASHI , TANABE KOUJI , KOSEKI TADASHI
IPC分类号： C22C38/00 , C21D9/50
摘要： PURPOSE:To prevent a local corrosion at welding heat affected part by quenching and tempering a welding base metal to obtain a homogeneous intermediate step structure, and to obtain temper treated said structure also in the welding heat affected part. CONSTITUTION:At welding time of a quenched and temper treated steel plate having the basic components of, by weight 0.05-0.13% C, 0.0005-0.003% B, 0.01-0.1% Sol, Al, 0.0005-0.01% Ca and 0.3-0.70% quenchability parameter P at welding time indicated by a formula (1), all of the structure of the welding heat affected part is made to the intermediate structure in processes from hand welding of low heat input due to rapid cooling rate to submerged arc welding of high heat input due to slow cooling rate. Simultaneously, only the surface layer part near the welding part where corrosion may be caused is temper treated locally at 500-700 deg.C in 5mm. depth or below, and the welding heat affected part is prevented from the corrosion by sea water, etc. in contact therewith.

8. 发明专利

JPS5913048A Tenacious steel for cold forging 失效
标题翻译：冷锻用钢
公开(公告)号：JPS5913048A
公开(公告)日：1984-01-23
申请号：JP12169682
申请日：1982-07-13
申请人： Nippon Steel Corp
发明人： GONDOU HISASHI , YAMATO KAZUNARI , INOUE HISASHI , TANABE KOUJI
IPC分类号： C22C38/00 , C22C38/06 , C22C38/14 , C22C38/32
摘要： PURPOSE: To obtain a tenacious steel for cold forging with improved cold forgeability, by reducing the contents of Si, Mn, P, Al, N and O in a machine structural carbon steel to prescribed amounts or less and by adding small amounts of Ti, B and Ca.
CONSTITUTION: The contents of Si, Mn, P, Al, N and O in a machine structural carbon steel contg. 0.4W0.75% C are reduced to ≤0.1% Si, ≤0.4% Mn, ≤0.01% P, ≤0.01% Al, ≤0.005% N and ≤0.005% O, and ≤0.05% Ti, ≤0.003% B and ≤0.01% Ca are added to the steel. ≤0.8% Cr may be added furthermore. The contents of said components in the carbon steel are reduced, the insufficient hardenability is compensated by adding Ti and B, and Ca is actively added to cause deoxidation. As a result, a steel material with remarkably improved deformation resistance and deformability is obtd.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：通过将机械结构碳钢中的Si，Mn，P，Al，N和O的含量降低到规定量以下，通过添加少量的Ti来获得具有改善的冷锻性的用于冷锻的韧性钢， B和Ca. 构成：机械结构碳钢中Si，Mn，P，Al，N和O的含量 0.4-0.75％C降低到<= 0.1％Si，<= 0.4％Mn，<= 0.01％P，<= 0.01％Al，<= 0.005％N和<= 0.005％O，<= 0.05％Ti ，钢中加入<= 0.003％B和<= 0.01％Ca。还可以添加<= 0.8％的Cr。碳钢中所述组分的含量降低，通过添加Ti和B来补偿不足的淬透性，并且主动加入Ca以引起脱氧。结果，可以看到具有显着提高的变形阻力和变形能力的钢材。

9. 发明专利

JPS5763635A Production of steel bar for cold forming 失效
标题翻译：生产用于冷成型的钢棒
公开(公告)号：JPS5763635A
公开(公告)日：1982-04-17
申请号：JP13835280
申请日：1980-10-03
申请人： Nippon Steel Corp
发明人： GONDOU HISASHI , YAMATO KAZUNARI , INOUE HISASHI , TANABE KOUJI
IPC分类号： C22C38/00 , B65H3/52 , C21D6/00
CPC分类号： C22C38/02 , B65H3/52 , C21D1/26 , C21D1/32 , C21D9/525 , C21D2211/005 , C21D2211/008 , C22C38/002 , C22C38/04 , C22C38/06
摘要： PURPOSE:To save spheroidizing heat treatment and obtain a steel bar of small deformation resistance during cold forging by holding a hot rolled-steel bar at the temp. below AC1 temp. amd as close to the same as possible. CONSTITUTION:The hot-rolled steel bar of 0.15-0.45 C by %, =5hr. Then, cementite cohesively deposits and the strength lowers. However, the formation of coarse ferrite grains occurs and the cracking during cold forging is liable to occur. To prevent this, Si is kept low, and Al, Ca are made essential. However, a large amt. of Al leads to brittle grain boundaries on account of deposition of AlN. The Ca at the upper limit is sufficient. The holding temp. is required t be below the AC1 point on account of cementite deposition and to be above the lower limit in order to expedite the cohesion thereof. The time is the time required for the deposition and cohesion thereof.
摘要翻译：目的：为了节省球化热处理，通过将热轧钢棒保持在温度下，在冷锻期间获得具有小变形阻力的钢棒。低于AC1温度 amd尽可能接近一样。构成：轧制0.15-0.45℃的热轧钢筋，<= 0.1Si，0.1-1.0Mn，<= 0.020A，<= 0.02Ca，余量基本上为Fe，然后将其放入炉的炉温在AC1相变点以下600℃以上，AC1相变点不低于50℃，维持> 5hr。然后，渗碳体凝聚沉积，强度降低。然而，发生粗铁素体晶粒的形成，并且容易发生冷锻期间的开裂。为了防止这种情况，Si保持较低，并且使Al，Ca成为必需的。然而，一个大的。的Al由于AlN的沉积导致脆性晶界。 Ca在上限就足够了。保持温度由于渗碳体沉积需要在AC1点以下，并且为了加速其凝聚力而高于下限。时间是沉积和凝聚所需的时间。

10. 发明专利

JPS56136930A WORKING METHOD FOR HIGH TENSILE STEEL PLATE 失效
公开(公告)号：JPS56136930A
公开(公告)日：1981-10-26
申请号：JP3816680
申请日：1980-03-27
申请人： NIPPON STEEL CORP
发明人： YAMATO KAZUNARI , INOUE HISASHI , TANABE KOUJI
IPC分类号： C21D9/52 , B21J5/00
摘要： PURPOSE:To obtain a product which does not form any crack, is superior in shape and provides high strength and toughness by hardening a steel plate of 60-100kg/ mm. in strength after hardening and tempering, and 5-50mm. thickness then heating the same to its annealing temp. and plastically working the same within the specific temp. range during cooling this. CONSTITUTION:A steel plate of 60-100kg/mm. in tensile strength after annealing and tempering and 5-50mm. thickness is hardened. When the 450-650 deg.C temp. range is reached, it is worked to machine prts etc. by pressing, spinning and forging.

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