公开(公告)号：US20180080107A1

公开(公告)日：2018-03-22

申请号：US15267673

申请日：2016-09-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Maurice G. Meyer ,  Qigui Wang ,  Jianghuai Yang

IPC: C22F1/04 ,  F02F1/00 ,  H05B6/10 ,  H05B6/06 ,  C21D1/42 ,  C21D1/30 ,  C21D1/613

CPC classification number: C22F1/04 ,  C21D1/30 ,  C21D1/42 ,  C21D1/613 ,  F02F1/004 ,  F02F1/18 ,  F02F7/0085 ,  F02F2200/06 ,  H05B6/06 ,  H05B6/101 ,  Y02P10/253

Abstract: A method for relieving residual stress in cast-in-place liners of high pressure die cast (HPDC) engine blocks to prevent cracking in the liners during the machining process. The method includes locally heating up the liners and the surrounding engine block material through rapid induction heating and then cooling down the liners and surrounding engine block material with still ambient air to a predetermined temperature after the residual stress has been reduced to a desired threshold.

公开(公告)号：US20170362691A1

公开(公告)日：2017-12-21

申请号：US15184699

申请日：2016-06-16

Applicant: GM Global Technology Operations LLC

Inventor： Zhe Li ,  Martin S. Kramer ,  Yucong Wang ,  Jianghuai Yang

IPC: C23C4/02 ,  F02F1/00

CPC classification number: C23C4/02 ,  F02F1/004

Abstract: An improved substrate surface texture i.e., roughness, significantly improves the adhesion of thermal spray coatings. The surface texture is defined by two metrology parameters and the invention comprehends a range of average roughness (Sa) between 9 and 15 μm and developed interfacial area ratio (Sdr) of greater than 100%. This surface texture is achieved by methods such as water jet erosion, mechanical roughening, laser texturing, chemical etching and plasma etching. The surface texture is especially beneficial for walls of cylinders of internal combustion engines, hydraulic cylinders and similar components to which a thermal spray coating is adhered and which are exposed to sliding or frictional wear.

公开(公告)号：US20170322183A1

公开(公告)日：2017-11-09

申请号：US15145418

申请日：2016-05-03

Applicant: GM Global Technology Operations LLC

Inventor： Jianghuai Yang ,  Martin S. Kramer ,  Qigui Wang ,  Yucong Wang ,  Zhe Li

IPC: G01N29/04 ,  F02F1/18 ,  C23C4/00 ,  F02F1/00

CPC classification number: G01N29/04 ,  C23C4/00 ,  C23C4/18 ,  F02F1/18 ,  F02F2001/008 ,  G01N29/14 ,  G01N2291/0289 ,  G01N2291/101 ,  G01N2291/106 ,  G01N2291/2636

Abstract: A system for inspecting thermal spray coated cylinder bores of aluminum alloy cylinder blocks, the system includes a failure detection apparatus, a heating apparatus, a cooling apparatus, and a control unit in electronic communication with each of the failure detection apparatus, the heating apparatus, and the cooling apparatus, and wherein the control unit includes a memory and a control logic sequence for operating the system.

公开(公告)号：US11890668B2

公开(公告)日：2024-02-06

申请号：US17839680

申请日：2022-06-14

Applicant: GM Global Technology Operations LLC

Inventor： Liang Wang ,  Qigui Wang ,  Jianghuai Yang ,  Kiran Mistry ,  Oliver Patrick Jordan

IPC: B22D25/02 ,  B22C9/02 ,  B22D19/04 ,  B22D25/06

CPC classification number: B22C9/02 ,  B22D19/04 ,  B22D25/06 ,  B23P2700/07 ,  F16C2202/06 ,  F16C2202/10 ,  F16C2204/60 ,  F16C2220/06 ,  Y10T29/17 ,  Y10T29/49286

Abstract: Systems and methods of making a cast steel alloy crankshaft for an internal combustion engine are provided. The method comprises providing a mold of the crankshaft. The mold has cavities to form the crankshaft. The method further comprises melting a first metallic material at between 1400 degrees Celsius (° C.) and 1600° C. to define a molten metallic material. In addition, the method further comprises feeding the molten metallic material at a riser connection angle of between 30° and 75° in the cavities of the negative sand cast mold. The method further comprises cooling the molten metallic material at a solidification time of between 5 seconds (sec) and 20 sec in the negative sand cast mold with at least one chill member to define a solidified metallic material having dimensions of the cast steel alloy crankshaft. Furthermore, the method comprises separating the solidified metallic material from the negative sand cast mold to define the cast steel alloy crankshaft.

公开(公告)号：US11879168B2

公开(公告)日：2024-01-23

申请号：US17462527

申请日：2021-08-31

Applicant: GM Global Technology Operations LLC

Inventor： Jianghuai Yang ,  Dale A. Gerard ,  Qigui Wang

IPC: C22C37/10 ,  F02F1/00 ,  C22C37/08

CPC classification number: C22C37/10 ,  C22C37/08 ,  F02F1/004

Abstract: A high elastic modulus, high ultimate tensile strength, and low alloy gray cast iron for cylinder liners. The gray cast iron includes from 2.60 wt % to 3.30 wt % Carbon (C); from 1.50 wt % to 2.30 wt % Silicon (Si); from 0.30 wt % to 0.80 wt % Manganese (Mn); from 0.15 wt % to 0.35 wt % Phosphorus (P); from 0.05 wt % to 0.11 wt % Sulphur (S); from 0.60 wt % to 1.20 wt % Copper (Cu); from 0.10 wt % to 0.30 wt % Chromium (Cr); from greater than 0.0 wt % to 0.1 wt % Nickle (Ni); from 0.15 wt % to 0.40 wt % Molybdenum (Mo); and balance wt % Iron (Fe). The total wt % of Si, Mn, P, S, Cu, Cr, Ni, and Mo is less than about 4.10 wt %. The gray cast iron has a Carbon Equivalent (CE) from 3.00 wt % to 3.90 wt % and the product of Mn %*S % is from 0.025 to 0.045.

公开(公告)号：US20230059113A1

公开(公告)日：2023-02-23

申请号：US17407884

申请日：2021-08-20

Applicant: GM Global Technology Operations LLC

Inventor： Jianghuai Yang ,  Qigui Wang ,  Anil K. Sachdev

IPC: B22D29/04 ,  C22C38/44 ,  C22C38/42 ,  C22C38/50 ,  C22C38/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/00

Abstract: A cast steel alloy for an engine of a vehicle is provided. The cast steel alloy comprises 0.29 to 0.65 weight percent (wt %) carbon, 0.40 to 0.80 wt % silicon, 0.6 to 1.5 wt % manganese, up to 0.03 wt % phosphorus, 0.04 to 0.07 wt % sulfur, 0.8 to 1.4 wt % chromium, 0.2 to 0.6 wt % nickel, 0.15 to 0.55 wt % molybdenum, 0.25 to 2.0 wt % copper, up to 0.03 wt % titanium, 0.07 to 0.17 wt % vanadium, 0.02 to 0.06 wt % aluminum, up to 0.03 wt % nitrogen (N), and 0.01 to 0.06 wt % of at least one of cerium (Ce) and lanthanum. The cast steel alloy has unexpected and unconventional results such as reduced ferrite and enhanced strengths.

公开(公告)号：US11098672B2

公开(公告)日：2021-08-24

申请号：US16539269

申请日：2019-08-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jianghuai Yang ,  Qigui Wang ,  Dale A. Gerard

IPC: F02F1/10 ,  F02F1/00 ,  F02F1/08

Abstract: A method of forming an engine component includes providing a cylinder liner main body having a curved interior wall forming a cylinder bore extending along a bore axis and a curved exterior wall formed circumferentially about the curved interior wall. The method includes disposing a coating layer onto the interior wall and the exterior wall. A cylinder liner is provided that includes a main body and a coating layer disposed on an exterior wall and on an interior wall of the main body.

公开(公告)号：US20210087645A1

公开(公告)日：2021-03-25

申请号：US17114961

申请日：2020-12-08

Applicant: GM Global Technology Operations LLC

Inventor： Jianghuai Yang ,  James D. Cremonesi ,  Paul J. Gelazin ,  Qigui Wang ,  Daniel J. Wilson

IPC: C21D9/30 ,  F16C3/08 ,  C21D1/18 ,  C21D1/58 ,  C22C38/00

Abstract: A method for manufacturing a crankshaft for an internal combustion engine with a plurality of journals having a hardened case with a first microstructure. The crankshaft is comprised of a steel comprising between about 0.3 wt % and 0.77 wt % Carbon. The first microstructure of the hardened case of the journals comprises between about 15% and 30% ferrite and a balance of martensite and the resultant subsurface residual stress between 310 MPa and 620 MPa.

公开(公告)号：US20200306825A1

公开(公告)日：2020-10-01

申请号：US16363526

申请日：2019-03-25

Applicant: GM Global Technology Operations LLC

Inventor： Jianghuai Yang ,  Qigui Wang ,  Dale A. Gerard ,  Michael J. Braskich

IPC: B22D19/00 ,  F02F1/00 ,  F02B77/04

Abstract: A method of manufacturing a cylinder block for an engine comprises providing a cylinder liner for the cylinder block and keeping the cylinder liner in a controlled atmosphere, removing the cylinder liner from the controlled atmosphere, removing moisture and gaseous contamination from the cylinder liner, and positioning the cylinder liner in a mold and over-casting a cylinder block in the mold.

公开(公告)号：US20200095655A1

公开(公告)日：2020-03-26

申请号：US16136445

申请日：2018-09-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jianghuai Yang ,  James D. Cremonesi ,  Qigui Wang ,  Eduardo Velasco Orosco ,  Dale A. Gerard

IPC: C22C37/10 ,  C22C37/06

Abstract: A nodular iron alloy and automotive components, such as crankshafts, are provided. The nodular iron alloy may include iron, about 3.3-3.9 wt % carbon, about 0.2-0.5 wt % manganese, about 1.9-2.6 wt % silicon, about 0.15-0.30 wt % copper, about 0.03-0.06 wt % magnesium, about 0-0.02 wt % sulfur, about 0-0.1 wt % chromium, about 0-0.05 wt % phosphorus, and/or about 0-0.01 wt % tin. The nodular iron alloy may include a number of graphite nodules, each having a diameter between 15 and 120 micrometers, and the graphite nodules having a number density of at least 90 per square millimeter. Iron may surround the graphite nodules in an amount of 20-40% of a ferrite microstructure and 60-80% of a pearlite microstructure. The nodular iron alloy may have an ultimate tensile strength in the range of 550 MPa to 680 MPa as-cast and at least 80% nodularity.